US2714208A - Stapling implement - Google Patents

Description

R. w. JENNY 2,714,208

STAPLING IMPLEMENT 4 Sheets-Sheet 1 Aug. 2, 1955 Filed Nov. 20, 1953 l1g 2, 1955 R. w. JENNY 2,714,208

STAPLING IMPLEMENT Filed Nov. 20, 1953 4 Sheets-Sheet 2 Il: :Hl

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Aug. 2, 1955 R. w. JENNY STAPLING IMPLEMENT 4 Sheets-Sheet 3 Filed Nov; 2o, 1955 efr larneiys.

5 In den ior: Rob er W/emzy All@ 2, 1955 R. w. JENNY 2,714,208

STAPLING IMPLEMENT Filed Nov. 20, 1953 4 Sheets-Sheet 4 20 9 214 /2 E la 2930 y ffii? 2 lhhhhhhhhm E914. so /07 f fig-qld [n ezzifor. Roberl/Jenzfy United States Patent Ofi ice Patented Aug. 2, 1955 STAPLNG IMPLEMENT Robert W. Jenny, Westerly, R. I., assigner to Bostitch, llnc., Stonington, Conn., a corporation of Rhode Island Application November' Ztl, 1953, Serial No. 393,347

18 Claims. (Cl. 144.4)

This invention relates to improvements in stapling and wire-stitching machines and particularly to a huid-pressure operated implement adapted to be manipulated manually with the staple-applying means driven by compressed air. Y

One object of the invention is to provide a poweroperated implement of light weight adapted to be held in the hand for applying it to the work and convenient for loading with staples with the greatest facility.

Another object is to provide an implement of the type indicated having a pivoted magazine for containing the staples which may be quickly opened at the front for convenient insertion of the staples in loading it.

Another object is to provide an implement of the type indicated having its parts so constructed and arranged as to be readily disassembled for repair or replacement and iikewise quickly reassembled with a minimum use of tools. p

Another object is to provide a rest for the staple-strip which .is automatically projected from the end of the magazine for guiding the staples thereinto when the magazine is opened for loading. p

Another object is to provide in an implement of the type indicated meansffor restraining the staples from rocking or canting in the throat after'they have been separated from the strip or stick to be driven into the work.

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Further objects of the improvement are set forth in 2.

the following specification which describes a preferred form of construction of the implement, by way of example, as illustrated in the accompanying drawings. In the drawings:

Fig. 1 is a side elevational View of the complete implement shown with its parts in operative relationship and the magazine loaded with staples;

Fig. 2 is a top plan view of the implement;

Fig. 3 is a bottom plan View of the same;

Fig. 4 is a part-sectional side view of the implement taken inthe vertical plane of its axis;

Fig. 5 is a transverse sectional view of a portion of the implement taken on line 5--5 of Fig. 4;

Fig. 6 is a transverse sectional view of the lower magazine portion of the implement taken on line 6-6 of Fig. 4;

Fig. 7 is a side elevational View of the machine showing the magazine open for loading with staples;

Fig. 8 is a front elevational View of the implement;

Fig. 9 is a transverse vertical sectional View at the front of the implement showing the pneumatically-operated piston, the staple-driver connected thereto, and certain parts of the staple-magazine;

Fig. l0 is a vertical sectional View on line lik-1t? of Fig. 4.

Fig. 11 is a detailed sectional View of the forward nose of the implement containing the throat through which the staples are driven;

Fig. 12 is a transverse sectional detailed View of the same taken on line 12-12 of Fig. 8;

Fig. 13 is a vertical sectional view of the upper portion of the implement showing the trigger-operated valve for controlling the pneumatic pressure for driving the piston;

Fig. 14 is a similar View showing the quick-opening air-valve as initially operated for opening it; and

Fig. 15 is a similar view showing the air-valve as cornpletely opened.

ln certain kinds of work, for example in driving staples into hard materials or through numerous layers of thick work, a power-operated implement is desirable and one that can be operated rapidly for applying the fasteners or staples in rapid succession. It is also desirable that the implement be convenient for holding in the hand and for loading its magazine with staples without chance of their becoming misalined therein and liable to be cramped to prevent their proper feeding. The present implement provides these improved features, while at the same time being convenient to operate and having its parts capable of being quickly disassembled for cleaning or repair and readily reassembled with a minimum use of tools.

Referring to the present drawings, the implement in general comprises an upper hollow handle-member 2 containing a valve-housing 3 and the piston 4 which actuates the staple-driver 5. A vertical cylinder 6 for the piston 4 is held within the cylindrical casing or head 7 at the forward end of the handle-member 2 and a horizontal magazine for the staples is pivoted midway of its ends on a strut 11 depending from the handle-member to adapt it to be swung around to quickly open its forward end without obstruction from the other parts of the implement. At the front of the implement is a depending nosepiece l2 formed with the throat through which the staples are driven into the work. The staple-driver 5 is connected to the piston 4 and adapted to be actuated to sever a staple from a strip or stick in the magazine with its motion thereafter accelerated to drive the staple into the work with a rapid stroke of the driver under maximum power, The upper portion of the implement or handlemember 2 is of hollow construction with the cylindrical enclosure or casing 7 at the front. The handle-member 2 carries the air-valve which may be of any suitable construction but preferably is of the quick-opening type such as next described.

Referring to Figs. 13 to l5, the handle-member 2 is provided with a vertical bore for receiving the cylindrical Valve-housing 3 which is formed with an axial bore 15 for slidably mounting a plunger 16. Above the bore is a counterbore 17 form which a port 18 leads into a vertical duct 19 that is continued at right-angles at the top to form arelatively constricted entrance 20 (Fig. 9) to the top of the cylinder 6. A pin 23 projecting transversely through the sides of the member 2 engages in a groove in the side of the valve-housing 3 to secure the latter in place. Extending longitudinally within the member 2 is an air-chamber 24 at the end of which is a threaded bore for receiving a nipple attached to the end of a hose 26 communicating with a source of compressed air or other fluid pressure. The plunger 16 is reduced in diameter toward its upper end to form a stem 27 which is constructed with a head 28 carrying a disk 29 at its end which overlies a washer 30 adapted to seat against the reduced end 31 of the valvehousing 3. The upper portion of the cylindrical housing 3 is reduced in diameter to receive a flexible gasket 32 seated in the end of the bore for the housing to seal the joint against leakage. Leading from the bore 15 in the housing is a duct 22 opening into a larger passage 33 which reaches to the rearward end of the member 2 to provide an egress for exhausting the air when the piston 4 is withdrawn to the upper end of the cylinder 6. The valve thus far described is of the poppet type so constructed as to operate for quick opening in a manner as later explained. The valve may be operated manually by means of a trigger pivoted on a pin 36 extending across the sides of a slot 37 in the bottom of the member 2 on which the trigger 35 is adapted to pivot. The trigger 35 may be constructed of sheet-metal and formed with a lateral bottom wall 3S adapted to engage the lower end of the plunger 16 to raise it in the bore of the Valve-housing 3. The metal of the trigger 35 is sheared away at its pivoted end and bent into a curved lip or linger 39 adapted to strike against the side of the cylinder 6 to limit the downward pivotal motion of the trigger as shown in Fig. 13. A spring-washer 4@ held in a peripheral groove adjacent the lower end of the plunger 16 is adapted to engage against the bottom of the valve-housing 3 to limit the upward movement of the plunger.

The cylinder 6 is held in the cylindrical head 7 of the member 2 and projects downwardly therefrom, being provided with an enlargement 43 at the bottom forming a shoulder 44 for mounting a horizontal plate-like member Ll 45. The forward portion of the plate or member 45 is of substantially rectangular outline in plan view (Fig. 6) and formed with a bore therein for receiving the wall of the cylinder 6. Projecting rearwardly from the member 45 is a narrower extension 46 terminating in a lug 47 which fits within a slot formed by the bifurcated end of the vertical strut 11, previously referred to as depending from the bottom of the member 2. The upper end of the strut 11 is received in a slot 48 on the under side of the member 2 and fastened in place by a crosspin 50. The f extension 46 of the member 4S carries latching means for the sustaining staple-magazine 10 which is pivoted to the lower end of the strut 11. For this purpose the magazine 10 has upstanding spaced ears 51 which straddle the sides of the strut 11 with a headed pin 52 projecting through holes in said ears, holes in the strut and also a hole in the lug 47 to connect these several parts together. A wire spring-ring 53 is inserted in a peripheral groove in the end of the pin 52 (Fig. 7) to fasten it in place. The

plate member 45 is thus xedly suspended from the handlemember 2 with the staple-magazine 1t) pivotally mounted therebelow at its approximate center to adapt its forward portion to swing downwardly as shown in Fig. 7. The swinging or rocking motion of the magazine 16 acts to open its forward end for loading it with staples in the manner as later explained; it being noted that the rearward end of the magazine engages against a rounded projection on the under side of the member 2 to limit its downward swinging motion at the front.

The means for holding the magazine 1?' in horizontal relationship below the plate member 45 consists of a latch 55 (Figs. 4 and 6) slidable in a slot 56 on the under side of the narrow extension 46 of the plate member 45 and normally pressed forwardly by a helical spring 57 pocketed in a bore in the latch with its end bearing against the end of the slot. The forward end of the latch 55 is beveled at the top and bottom with its upper inclined face adapted to engage through a similarly-shaped angular opening 58 in an L-shaped looped keeper 6i? fastened to a part of the magazine 19. A pair of transverse pins 61 projectfrom the sides of the latch 55 through longitudinal slots 62 (Fig. 6) in the sides of the extension 46 of the plate member 45 and are riveted through a pair of finger-pieces 65 that are thus mounted to slide along the outside of said extension 46. The linger-pieces 65 are formed on their inner faces with projecting splines 63 fitted to slot-like recesses 64 in the sides of the extension 46 (Fig. l0) and acting to limit the sliding movement of the finger-pieces in each direction. A relatively flat leaf-spring 66 (Fig. 4) has its rearward end fastened by a rivet 67 to the upper wall of the slot 56 in the extension 46 of the plate member 45 to bear against an upwardly projecting portion 68 on the latch 55. When the latch is withdrawn to release its forward end from the keeper 60 the spring 66 acts frictionally against the face of the projection 68 to retain the of the staple-driver 5.

latch in this relationship against the pressure of the spring 57. When, however, the magazine 10 is swung upwardly the top of the keeper engages with the downturned forward end of the spring 66 to release its frictional iold on the latch 55 whereby the spring 57 will slide it forwardly to engage it with the keeper 60 as shown in Fig. 4. The outer faces of the finger-pieces are knurled or iluted as shown in Fig. 7 to adapt them to be conveniently grasped for sliding the latch 55 to release it from the keeper 6i) when it is desired to swing thc magazine iti downwardly to open its end for loading.

Fastened to the under side of the plate member 45 is the nose-piece 12 which is generally of triangular shape and formed with an upper rectangular plate portion 70 (Fig. 3) of the same shape as the plate 46 with a slotted opening at the center. The plate portion 70 is adapted to underlie the plate member 45 and is provided with holes at both ends for receiving screws 71 screwed into tapped holes in the forward square portion of the plate member 45. The upper face of the plate portion 70 is provided with a circular raised boss 72 adapted to tit Within the cylindrical bore in the plate member 45 (Fig. 9). A small flat key 75 is held in a slot in the raised portion on'the member '70 with its end projecting therefrom to engage a slotted keyway 76 in the bottom face of the plate member 45; the purpose of this construction being to accurately locate the nose 12 in position on the under side of the plate member 45. The key is fastened in place by a pin 77 having its lower reduced portion driven into a hole in the member 70 with its larger portion projecting thereabove to provide a dowel for locating a disk-like element 80 which forms the bottom of the cylinder 6. The disk Si) (Figs. 4 and 9) is provided with a projecting ange S1 at the bottom engaging in a cylindrical groove 82 in the lower end of the cylinder 6 with the larger portion of the pin 77 projecting into a hole 83 in the disk. Cut into the side of the disk 86 is a T-shaped slot 85 (Fig. 5) through which the staple-driver 5 is adapted to slide as it descends during a driving stroke. VA second rectangular slot 86 is cut through the rearward side of the disk 80 to serve for a purpose later` explained.

Referring to Figs. 4 and 9, the staple-driver 5 is connected to the piston 4 by means of a T-shaped head 87 engaging in a similarly-shaped slot S8 on the forward side of the piston 4, the head being preferably of ovate contour or boat-shaped to adapt it to conform to the outer cylindrical surface of the piston 4, see dotted lines in Fig. 2, and the contour at'the back of the slot 88. The stapledriver 5 is of peculiar formation being constructed with a relatively thin blade portion extending downwardly from its head 87 and a relatively thick rib 91 on the front tapering from the head to the bottom edge of the blade, thus serving as a reinforcement for the blade. As shown in full lines in Fig. 4 and dotted lines in Fig. l, the lateral edges of the blade 90 are thinner than its main portion, thereby forming relatively narrow flanges at either side, see Fig. 8. The purpose of this form of construction is explained later in connection with the peculiar formation of the staple-throat in the nose-piece 12.

As shown in Fig. 4, the piston 4 is of hollow construction formed by a vertical bore disposed eccentrically to the axis of the piston to provide a thicker wall 196 at the front where it is slotted to receive the head 87 The piston 4 is normally held raised in the cylinder 6 by means of a helical spring 107 engaging under the closed upper end of the bore 105 with the lower end of the spring seated in a recess Hi8 in the closure disk 80. Rising from the center of the recess 163 in the disk Sil is a cylindrical post 109 formed with an axial bore 11d terminating in a beveled bottom formation having a small hole 111 leading downwardly through the bottom of the disk. The post 109 is offset from the axis of the disk to correspond with the eccentric relation of the bore in the piston 4 and the spring 107 is coiled 5. around its exterior with its lower end seated in the recess 108. Mounted within the bore of the post 109 is a cylindrical plug 112 of rubber or other resilient material which seats against the bottom of the bore 110 and is provided with an upwardly extending stern 113 projecting slightly above the top of the post 109. A bevel-ended washer 114, preferably constructed of nylon or similar plastic material to provide for durability, is mounted in the bore 110 above the plug with the stern 113 projecting through an axial hole therein. The washer 114 serves as a buffer to take the thrust and relieve the shoc'ar of the piston 4 as it is driven downwardly by pneumatic pressure during the descent of the driver for applying a staple to the work; it being understood that the rubber plug 112 will yield under the blow of the piston and any air trapped beneath the plug as it is distended by the blow of the piston will escape through the vent hole 111.

The staple-magazine is of novel construction to adapt it to mount a slidable element at the front to provide a closure for the rearward side of the nose 12 to complete the throat therein. This element forms a continuation of the staple-core and is adapted to be projected forwardly therewith to a position beyond the end of the magazine to serve as a rest for guiding the staples into the magazine during the loading thereof. Referring particularly to Figs. 7, 9 and l0, the magazine 10 comprises an outer trough-shaped casing having a bottom wall 115, spaced side walls 116 relatively wide flanges 117 substantially closing the top of the trough at the rear thereof and folded in portions at its rearward end meeting to close this end. Forwardly beyond the ears 51 are narrow flanges 113 which provide a space therebetween for the keeper to project through.

Within the interior of the magazine 10 is a U-shapcd staple-core 124) formed of sheet-metal with a bottom wall 121 and side walls 122. The staple-core 120 is supported on the bottom wall or floor of the magazine 10 to adapt it to slide longitudinally therein. A cylindrical abutment 123 projects above the floor 115 of the magazine 10 to engage through a relatively short slot 124 in the` bottom wall 121 of the staple-core 120 (Fig. '7) to limit its sliding movement longitudinally in the magazine. A plunger-pin 125 is slidably supported in a plug 126 welded between the sides of the core 120 at its end with a helical spring 127 surrounding the rearward portion of the plunger. One end of the spring 127 abuts the end of a counterbore 128 in the plug 126 and is held under compression by a spring-washer 129 abutting its opposite end. The head 130 at one end of the plunger-pin 125 limits its sliding motion under the tension of the spring 127 to prevent its release when the parts are first assembled. rl`he spring 127 is employed for sliding the core 120 forwardly in the magazine 10 when the magazine is swung downwardly to open its end for receiving a supply of staples.

As before noted, the forward portion of the core 121) is constituted as a staple rest or guide which is projecter beyond the open end of the magazine 10, as shown in Fig. 7, to position it for receiving the end of a staple stick straddled thereacross for facilitating entering the staples into the magazine. The guide 135 consists in a solid metal member fastened to the end of the staple-core and extending downwardly therebelow in a foot 136 to provide the closure abutment for the rearward side of the nose 12 in which the staple-throat is formed. The guide-member 135 has rearwardly-extending parallel wings 137 received within the hollow core 120 and welded or otherwise suitably secured to the side walls 122 thereof. The upper portion of the member 135 is recessed on the sides to aline it with the outer faces of the side walls 122 of the core 121) and adapt it to slide within the end of the magazine 10. At the top it is formed with slightly beveled faces 138 meeting at the center in conformity with the shape of the crossbars of the crowned staples s. Below the upper naritt Cie

. the pawl to rock the latter in clockwise direction.

6 rowed front portion of the member 135 it is formed with a slightly wider portion adapted to slidably fit between inwardly-offset narrow portions `or anges 139 at the front of the magazine 10 which form a guideway therefor.

` Therebelow the foot portion 136 of the member .135 is widened still further belond the sides of the core 120 to conform to the rearward face of the nose 12 with which it cooperates as a closure to form the throat through which the staples are driven.

A staple-pusher of usual sheet-metal construction has side walls joined by a beveled top Wall to adapt it to be slidably mounted on the core 120 and to be' advanced therealong for feeding the staples s to thedriving means. The staple-pusher 145 (Fig. 4) is advanced in the magazine by means of a helical spring 146 anchored at one end to a lug 147 formed by a slitted portion of the bottom wall 121 of the core 120 and bent upwardly therefrom. At the forward end of the core 120 is aA roller or pulley 148 journaled on a pin 149 held in holes in the side walls of the core between the wings 137 of the member 135. The spring 146 is drawn forward and upwardly around the roller 148 to extend rearwardly with its end fastened to a lug 150 bent down from the metal of the top wali of the pusher 145. The upper face of the pusher 145 is formed with serrations 151 (Fig. 7) adapted to be engaged by a detent-pawl, later described, to hold the pusher from being forced out from the end of the magazine 10 when it is opened without any staples remaining therein.

A trough-shaped cover-member 155 overlies the core 12@ with its bottom wall spaced slightly thereabove to provide a slit-like passageway thereunder forthe crowns of the staple to slide in. The cover member 155 is provided for preventing the staples from riding up on the core 120 and becoming misaligned. The rearward portion of the cover-member 155 rests on lugs or abutments 156 underlying the flanges 117 on the sides of the magazine 10 with its forward end sustained by a tubular pin 157 projecting into holes on its sides substantially midway of its ends. A spring-pin 158 (Figs. l and 3) extends through the bore in the hollow pin 157 and engages in relatively small holes in the sides of the magazine just below the ears 51 thereon. The loop-shaped keeper 60, previously described, has its foot portion welded or otherwise secured to the side walls of the member 15510 iixedly connect it to the magazine 10. At the forward end of the member 155 its bottom wall is formed with an elongate slot or opening 159 (Figs. 4 and 6) and pivotally mounted thereabove is a detent-pawl 16) for engaging with the staples to prevent them from sliding forwardly and escaping from the magazine. The pawl 160 is pivoted on a crosspin 161 held in the side walls of the member 155 with a pair of springs 162 coiled around the pin on either side thereof and having their shorter legs reaching forwardly and bent under the fore part of The longer legs of the springs 162 extend upwardly (Fig. 7) and are held under the flanges 11S at the sides of the magazine 10. The rearward end of the pawl 160 is bifurcated in swallow-tail shape to adapt its bifurcations to engage with a transverse pin 163 having its ends held in holes in the side walls of the member 155. One leg of the bifurcated end of the pawl 160 is adapted to project through the slot 159 in the bottom of the member 155 to engage with the staples to prevent them from sliding forwardly and escaping from the core when the magazine is opened as shown in Fig. 7.

The staple-throat (Figs. 4, 1l and l2) is of peculiar construction, as previously noted, being formed within the nose-member 12 by grooves of different widths at the sides thereof. At the top of the nose 12 on both sides thereof are grooves for receiving the lateral edges of the staple-driver blade 90 with parallel grooves 171 adjacent thereto for the thicker portion of the blade. Below the core 120 the grooves 170 are continued downwardly in narrower offset portions 172 of a width slightly less than the thickness of the staple legs. The purpose of this construction is to cause the staple being driven to be forced laterally into the magazine to a slight extent to bear against the foot 136 of the member 135 and thereby be held frictionally by the reaction of the spring 127 (Fig. 7) that tends to slide the core 12@ and closureabutrnent 136 forwardly. In this way a resilient pressure is applied against the staple to prevent it from sliding downwardly in the throat to escape by dropping out therefrom. Through this construction and arrangement of the parts the staple is prevented from rocking or Ganz-ing as it is held in the throat and accurately engaged by the edge of the driver to be driven into the work.

The method of operation of the improved implement is explained as follows: To open the magazine 1() for loading it with lstaples the finger-pieces 65 on the sides of the latch 55 are grasped between the fingers of the hand and slid rearwardly against the tension of the spring 57 (Fig. 4) to release the beveled end of the latch from the keeper 60; it being understood that the leaf-spring 66 applies pressure against the top of the latch 55 at this juncture to retain the latch retracted. With the latch 55 withdrawn from the keeper 69 the magazine 10 may be rocked about its pivot 52 to open its forward end (Fig. 7) as the abutment 136 is drawn downwardly and released from the nose 1.2. During this operation the spring 127 acts to slide the core 121i forwardly and project the staple-rest or guide 135 outwardly beyond the end of the magazine 120 to provide a ledge or rest on which the end of the staple-stick may be supported for guiding it into the magazine beneath the member 155. Should a few staples remain in the magazine 10 when it is opened they will be prevented from escaping through its open end by the detent-pawl 16() engaging with the crowns of the staples or with the serrations 151 in the top of the staple-pusher 145. With the magazine in open position as illustrated in Fig. 7 greater convenience and facility is provided for sliding the staple-stick into the magazine beneath the cover-member S by resting its end on the crowned top of the guide-member 135. After the staple-stick has been completely inserted into the magazine and held by the detent-pawl 160 engaging with the crowns of the individual staples the magazine may be closed.

To prepare the implement for operation, the forward end of the magazine 11i is swung upwardly and fastened in place by the latch 55 engaging through the opening in the keeper 6G. As the magazine 10 is swung into closed relationship the latch 6d will engage the forward end of the leaf-spring 66, which has sprung downwardly during the retraction of the latch 55, thereby releasing the spring from its frictional engagement with the top of the latch whereby the latter will be slid forwardly automatically under the tension of its spring 57. The beveled end of the latch 55 is thus caused to engage tirmly with the angular face of the opening 58 in the keeper 60 to securely hold the magazine in closed relationship with the abutment 156 forced snugly against the rearward face of the nose 12. During the closing of the magazine the pawl 16@ is disengaged from the crossbars of the staples by being rocked upwardly at the rear against the tension of the springs 162 as its forward portion `strikes against the under side of the closure disk 80.

After the closing of the magazine the pusher 145 is slid forwardly to feed the foremost staple s into the grooves 176 of the staple-throat with the spring 146 maintaining the pusher pressing thereagainst under its tension. The implement is then ready for operation, it being understood that the face-to-face sliding engagement of the closure-abutment 136 with the nose 12 causes the staple-core to slide into the magazine against the tension of the spring 127 with the staple-rest 135 retracted within the forward end of the magazine.

Cir

The implement may be grasped in one hand to apply it to the work for driving the staples by placing the fingers on one side and the thumb on the opposite side of the handle-member 2. The foreiinger may then be looked under the trigger 35 for operating the air-valve to apply pressure to the piston 4 for actuating the stapledriver 5. As the trigger 35 is drawn upwardly (Fig. 14) it raises the plunger 16 to lift the flexible washer 30 olf from its seat on the end of the valve-housing 3. The rleXible u asher 3i) will tend to cling to theA seat at its rim as shown in Fig. 14 until eventually it snaps off therefrom to provide for the quick opening of the valve and release of the air pressure from the chamber 24. The pressure thus is caused to flow down through the bore 17 and out through the duct 13 into the passage 19 which communicates with the chamber 2t) in the top of the casing 7 above the head of the piston 4. The piston e will therefore be driven downwardly in the cylinder 6 against the resilient pressure of the spring 107 to cause it to slide the staple-driver 5 downwardly and enter through the upper part of the throat in the nose 12.

As the staple-driver 5 descends under the force of the pressure cn the piston 4 the lower edge of the blade 90 will engage the crossbar or crown of the staple s held in the grooves`17 of the throat with the legs just above the narrower portion 172. As the driver 5 continues its descent the staple is forced down into the narrower portion 172 of the grooves and. this causes it to be shifted latterally to a siight extent to force the abutment 136 rearwardly whereby the pressure of the spring 127 will hold the staple firmly to insure its being driven straight into the work without chance of its buckling or becoming misalined with respect to the driver-blade.

It will be understood that as the piston i is forced downwardly and the spring 1%7 is compressed the head of the piston will eventually strike against the wearresistant washer 114 to compress the resilient plug 112 and cushion the shock at the end of the rapid stroke of the piston.

After the descent of the staple-driver 5 has driven a staple through the throat in the nose 12 and applied it to the work the trigger 35 is released to relieve the pressure on the piston 4. The pressure in the air-chamber 24 will thereupon depress the plunger 16 to cause the washer 3i? to seal the inlet to the valve-housing 3 so that the air can escape from the implement by owing back through the port 1S down through the bore 15 and out through the vent which is opened by the descent of the plunger 16 in the bore 15. From the vent 22 the air exhausts back through the passage 33 to escape into the atmosphere at the rear of the member 2.

Upon relief of pressure on the piston 4 the spring 167 raises it in the cylinder 6 to withdraw the driver 5 above the throat in the nose 12 with its lower edge 6 above the core 12% so that another staple is released to be fed forward into the grooves 17d forming the throat in the nose 12. The implement is then ready to repeat the operation above explained for driving another staple by rocking the trigger 35 to open the air-valve and apply pressure to the piston 4. The implement can thus he operated rapidly to apply a whole series of staples held in the magazine and when these are exhausted the maga,- zine may be opened again for loading and the staples inserted thercinto with ease and convenience by first placing the end of the staple-stick on the staple-rest or guide 135.

it will be observed from the foregoing specication that the present invention provides an improved stapler or fastener-applying implement which may be operated by pneumatic c-r hydraulic pressure and embodying a magazine which is readily opened at the end for loading with a supply of staples by simply placing the end of the staple-stick on the rest provided for this purpose. Moreover, the present improvement provides for firmly 9 guiding each staple during its descent through the throat as it is driven into the work whereby more positive driving action is secured without chance of the staple canting or twisting out of position.

As another feature of improvement, the open-sided staple-throat and the hinged magazine having the springpressed abutment for closing said throat provide that when the magazine is swung downwardly at its forward end it opens the throat completely so that malformed staples liable to clog the throat can be readily removed therefrom.

While the invention has been herein illustrated and described as embodied in a preferred form of construction, it is to be understood that modifications may be made in the structure and arrangement of the parts of the device without departing from the scope of the invention as expressed in the accompanying claims. Therefore, without limiting myself in this respect, I claim:

l. In a fastener-applying implement comprising means for driving staples into the work, a hollow magazine having an open end through whichthe staples may be fed to said driving means, a rest for the staples telescopically mounted in the open end ofthe magazine, means to support said magazine on the implement to adapt it to be moved relatively to that portion of the implement carrying the staple-driving means whereby to expose the open end of the magazine for loading the staples thereinto, and means for automatically projecting the staple-rest outwardly from the end of the magazine when the magazine is moved to expose its open end to provide for supporting the end of a staple-stick to guide it into the magazine.

j2. In a stapling implement having means for driving the staples to apply them to the work, a magazine for containing a supply of staples, said magazine open at one end to receive a supply of staples, means for mounting said magazine on the implement to adapt it to be moved away from said staple-driving means to expose its open end for loading the staples thereinto, a staplecore slidably mounted withinthe magazine to provide a support for thestaples, and means for sliding said staple-core forwardly in the magazine when said magazine is moved away from said staple-driving meansto project its end therebeyond to support a stick of staple for guiding it into the magazine.

3. In a stapling implement having means for driving the staples into the work, an open-ended magazine for delivering the staples to said driving means, means for feeding the staples in the magazine to deliver them to the driving means, a staple-rest slidably supported at the front of the magazine to telescope into its end when the magazine is in position for feeding the staples to the driving means, means for mounting the magazine to adapt its open end to be displaced from said driving means for loading the staples thereinto, and resilient means for projecting the staple-rest outwardly from the end of said magazine when said magazine is displaced from the staple-driving means to provide a support for the end of a staple-stick to guide the staples into the magazine.

4, In a stapling implement having means for driving the staples to apply them to the work, a magazine for containing a supply of staples, said magazine open at one end to receive the staples, means for mounting said magazine to adapt it to be moved away from the driving means to expose its open end for loading the staples thereinto, a staple-core slidably mounted within the magazine to provide a support for the staples, a cover overlying the core in the magazine to prevent the staples from riding up thereon, and resilient means for sliding the core forwardly in the magazine when said magazine is moved away from said staple-driving means to project the end of said core into position to serve as a rest for a stick of staples for guiding it into the magazine beneath said cover overlying the core.

` the staples 1n straddledrelation thereon, resilient means 5. In a fastener-applying implement comprising a member for mounting a reciprocable driver with means for actuating said driver to drive the fasteners into the work, said member having a portion formed with an open-sided throat through which the fasteners may be driven, a magazine for the fasteners having an open end, means for mounting said magazine to swing away from the throat for exposing its open end, a closureabutment slidable at the front of the magazine to engage across said throat to close the open side thereof, and resilient means in the magazine for maintaining said abutment in closed relationship overlying the open side of said throat.

6.` In a fastener-applying implement having a member constructed to mount a reciprocable fastener-driver, said member formed with an open-sided throat through which the fasteners may be driven, an open-ended magazine for the fasteners, means for supporting said magazine to adapt the fasteners to feed into said throat, means for feeding the fasteners from the magazine into said throat, means for displacing said magazine into position for exposing its open end for loading the fasteners thereinto, a slidable closure-abutment at the open end of said magazine, and resilient means for sliding said abutment into cooperative relation to the throat to close the open side thereof.

7. In a fastener-applying implement comprising a member constructed to mount a reciprocable driver and means for actuating said driver to drive the fasteners into the work, said member having a depending nose formed with grooves to provide an open-sided throat through which the fasteners may be driven, a hollow magazine for the fasteners hinged to said member to adapt its forward open end to swing downwardly for loading the fasteners thereinto, a closure-abutment slidable at the end of said magazine to engage across the open side of the throat, resilient means for maintaining said abutment in position to close the open side of' throat, and means for latching the magazine in operative position with the abutment closed against the open side of the throat.

8. In a fastener-applying implement comprising a member constructed to mount a staple-driver and means for actuating said driver to apply the staples to the work, said member having a portion formed with an `"open-sided throat through which the staples may be driven, a magazine for the staples open at one end and hinged to said member to adapt to swing away therefrom to expose its open end for receiving the staples, a core slidably mounted within the magazine for supporting for sliding said core forwardly in the magazine, an abutment carried at the forward end of said core and adapted to engage across the open side of the staplethroat when the magazine is in cooperative relationship therewith, and latching means for maintaining the magazine in position with the abutment closing the open side of the throat.

9. In a stapling implement comprising a member constructed to mount a staple-driver and means for actuating said driver to drive the staples into the work, a nose at the forward end of said member having grooves for slidably receiving the staple-driver and forming an opensided throat through which the staples may be driven, an open-ended magazine hinged to said member to adapt it to swing away therefrom to expose its open end for receiving a supply of staples, an abutment movably mounted at the end of the magazine and constructed to cooperate with said nose to close the open side of the staple-throat, means for latching the magazine in closed relation on said member with its end alined with said throat, and resilient means for normally holding said abutment in position closing the throat, said resilient means adapted to project the abutment beyond the open end of the magazine when the latter is swung to open V its end whereby said abutment serves as a rest for supporting a stick of staples to facilitate entering them into the magazine.

10. In a stapling implement having a member constructed to mount a reciprocable staple-driver and means to actuate said driver to drive the staples into the work, a depending nose on said member formed with an opensided throat through which the driver may be reciprocated, a hollow magazine for staples hinged to said memberand open at one end for loading with staples, a staple-core mounted to slide longitudinally within the magazine and adapted to support the staples thereon, resilient means for sliding said core forwardly in the magazine, an abutment at the forward end of said core adapted to support a stick of staples to guide it into the magazine, said abutment formed as a closure engageable with the side of the nose to close the throat therein when the magazine is alined with said throat, and means for holding the magazine in cooperative relation to the staple-throat.

11. In a stapling implement having a member constructed to mount a slidable staple-driver and means for actuating saidV driver to drive the staples into the work, said member formed with a depending nose at its forward end having an open-sided staple-throat therein, a hollow magazine pivoted to said member and having an open end forV receiving a supply of staples, said magazine being rockable to normally position it in alinement with said throat or to swing its forward end downwardly for exposing its open end to load the staples therein, a latch for fastening the magazine with its forward end in alinement with the staple-throat, a core for supporting the staples slidable longitudinally in the magazine, means to limit the sliding movement of said core, a spring for sliding said core in the magazine, and a rest at the forward end of said core adapted to support the end of a staple-stick for guiding the staples into the magazine, said rest being retractible into the magazine when the latter is in operative relationship with the core alined with said throat,

l2. In a stapling implement, a member constructed to mount a reciprocable staple-driver and means fOr actuating said driver to drive the staples into the work, an open-sided throat at the front of said member through which the staple-driver is adapted to slide to drive the staples, an open-ended magazine for holding a supply ot staples, means for hingedly mounting said magazine on said member to position it in cooperative relation to said throat or to swing away from said member to expose its open end for loading a supply of staples therein, an abutment slidably held at the forward open end of the magazine and formed with a rest at the top conforming to the shape of the staples held in the magazine, and resilient means for projecting said abutment forwardly from the end of the magazine to adapt it to support the end of a stick of staples for guiding the staples into the magazine in loading it. Y

13. In a stapling implement, a member constructed to slidably mount a staple-driver with means for actuating said driver to apply the staples to the work, said member having a depending nose-portion formed with vertical grooves at its sides in which the driver is adapted to reciprocate, the upper portion of said grooves being of a width corresponding to the width of the legs of the staple and the lower portion of the grooves being of a width less than the thickness of the legs of the staple, a staple-magazine hingedly supported on said member and having an open end to receive a supply of said staples, an abutment slidably mounted at the forward end of said magazine, means to latch said magazine in position with its forward end cooperating with the grooves in said nose, and a spring operative to project said abutment beyond the open end of the magazine to form a rest for guiding a supply of staples thereinto, said spring adapted to apply pressure to hold the abutment against the nose when the magazine is swung into operative position to close the staple-throat formed by the grooves therein.

14. In a staple-applying implement comprising a member containing a reciprocable staple-driver and iluidoperated means for actuating said driver, said member provided with a depending nose having an open-sided throat on one side formed by vertical grooves therein, the upper portions of said grooves being of a width corresponding to the thickness of the legs of the staples and the lower portions of said grooves being of a width less than the thickness of the staple-legs, an open-ended magazine hinged to said member to adapt it to be held in alinement with the throat in the nose or to be swung downwardly therefrom to expose its open end for receiving a supply of staples, an abutment slidably mounted at the forward open end of the magazine to adapt it to be retracted thereinto by engagement with the side of the throat when the magazine is in alinement with said throat, and resilient means for normally urging said abutment forwardly to frictionally engage it with a staple when the latter is driven down into the narrower portion of the grooves forming the throat in the nose.

l5. In a fastener-applying implement comprising a member carrying a staple-driver with means for operating said driver and a throat through which the staples are driven, a hollow magazine having an open end through which the staples may be fed to said driving means, means for hingedly mounting said magazine to adapt it to aline its end with the staple-throat or to swing downwardly therefrom for loading it with staples, latching means for holding said magazine in cooperative relation to said staple-throat, resilient means for engaging said latching means, manually-operable means for releasing the latching means, resilient means for frictionally engaging the latching means to retain it unlatched after operation by said manual means, and means to release said last named resilient means when the magazine is swung into operative relationship whereby the first named resilient means will actuate the latchiig means to hold said magazine in operative relations 1p.

16. In a stapling implement comprising a member carrying driving means for the staples and formed with a throat through which said staples may be driven, an open-ended magazine pivoted to said member to aline it with said staple-throat therein and adapt it to swing away from said member to expose its open end for loading the staples thereinto, a slidable latch, a keeper engageable by said latch to hold the magazine in cooperative relation to the throat in said member, a spring for sliding said latch to engage it with said keeper, and means engageable with the latch to retain it released .from said keeper, said latch-retaining means being actuated by said keeper when the magazine is swung into cooperative relation to the staple-throat to release said latch and cause the spring to slide it into` engagement with said keeper.

17. In a stapling implement comprising a member containing staple-driving means and formed with a throat through which the staples are driven, a magazine hinged to said member and formed with an opening at its end through which the staples may be loaded into the magazine, said magazine being adapted to aline with said throat to supply the staples to the driving means or to be swung away therefrom to open its end for loading the staples therein, a keeper on said magazine, a latch slidable on the member for engaging said keeper to hold the magazine in cooperative relation to the throat in said member, a spring for sliding said latch to engage it with the keeper, and a leaf-spring engageable with said latch to hold it released from the keeper, said leaf-spring being engageable by the keeper when the magazine is swung into operative relation to the stapleto open its end for receiving a supply of staples, a latch on said member, a keeper on said magazine, a spring for sliding said latch to engage it with the keeper to hold said magazine in cooperative relation with said throat in said member, a compression spring for sliding said latch to engage it with the keeper, an element frictionally engaging said latch to hold it released from said 14 l keeper, said keeper being adapted to engage said frictionelement to release it from the latch when the magazine is swung into cooperative relation with the throat in said member whereby said latch is actuated by said compression spring to automatically engage it with said keeper to maintain it in cooperative relationship with the staplethroat.

References Cited in the file of this patent UNITED STATES PATENTS 2,240,911 Polzer May 6, 1941 2,251,833 Polzer Aug. 5, 1941 2,279,584 Vogel Apr. 14, 1942 2,412,620 Kipp Dec. 17, 1946 2,433,155 Peterson Dec. 23, 1947

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