US2035957A - Hot press printing machine - Google Patents

Description

' 5 Sheets-Sheet l Mmh 33 m3@ c. GABRIELSEN HOT PRESS PRINTING MACHINE Filed March 2, 1935 Mwh 3i i935- c. GABRIELSEN HOT PRESS PRINTING MACHINE 3 SheetS-Shet 2 Filed March 2, 1935 INVENTQR v Ch v/JT/cm Galarza/sen @BY Mmh 3l, i936., u Q GABRIELSEN 935,5?

HOT PRESS PRINTING MACHINE Filed March 2, 1935 3 Sheets-Sheet 3 INVENTOR Patented .Man 3l, 1936 UNITED STATES PATENT OFFICE HOT PRESS PRINTING MACHINE Application March 2, 1935, Serial No. 9,057

9 Claims.

The invention relates to a hot press printing machine.

In machines of this character an inked strip is passed between the platen and the type. The type is heated and pressure is applied to force the type and strip against the object or material on the platen.

The inked strip, particularly in some colors, is costly and one of the principal objects of the present invention is to provide a simple device to insure against any possible wastage of the strip during the printing opera-tion. In printing some monograms it may only be necessary to use a fraction of an inch of the inked strip while in. printing names or other indicia several inches of the strip may be used. In accordance with the present invention the amount of the strip to be fed may be instantly adjusted with absolute accuracy. This also tends to make the machine more eicient in operation due to greatly increasing the output of the machine, as in known types of adjustment for these machines, considerable time must be taken fo-r the adjustment or it will be inaccurate and result in either a wastage of the inked strip or spoilage of the material which is being printed.

A further object of the invention is to provide a simple means for adjusting the distance between the platen and the type. This is advantageous in printing on objects and material of different thicknesses.

A still further object is the provision of a simple and improved form of type holder.

The invention will be described in detail in the following specification and a preferred form thereof illustrated in the accompanying drawings.

Referring to said drawings:

Fig. 1 is an end elevation;

Fig. 2 is a fragmentary detail view illustrating the type-holder and heating element, the supporting bar being in section;

Fig. 3 is a front elevation;

Fig. 4 is a detail perspective view of a fianged shell, forming one of the important elements of the invention;

Fig. 5 is a rear view of the inked tape feed adjusting means and is taken on line 5--5 of Fig. 1;

Fig. 6 is a sectional View of the parts shown in Fig. 5 and is taken on line 6-6 of Fig. l; and

Fig. 7 is a fragmentary detail sectional view taken on line 'I--'I of Fig. 1.

Referring again to said drawings the reference numeral I0 designates the base which is provided with an upwardly extending overhanging arm II.

The arm II carries a vertically movable plunger I2 having rack teeth I3 cut on its rear side. These teeth are engaged by a pinion i4 (Cl. lOl-Z7) fixed to a shaft I5 which has its bearing in the overhanging arm II. Secured to the lower end of the plunger I2 is the heating element I6 which carries on its under side the type holder I'I hereinafter described.

Suitably mounted on the base I0 is the work supporting plate I8 into which is set an appropriate platen I9.

The heating element I 6 and type holder I'I carried by the plunger I2 is moved toward the platen by an operating lever which is loosely mounted on the shaft I5. The outer face of the operating lever hub is provided with teeth 2I which engage corresponding teeth 22 on a collar 23 keyed at 24 (see Fig. 7) to the shaft I5. The teeth 2I and 22 are held in engagement with each other by a nut 25 threaded on the end of the shaft I5. A spring 26 (see Fig. 7) is interposed between the collar 23 and the 0perati'ng lever hub and this spring acts to disengage thev teeth 2I-22 when nut 25 is moved outwardly on the shaft I5.

The gforegoing arrangement permits of the adjustment of the distance between the platen and the type. Suppose, for instance, the machine is set for printing on paper and it is desired to change it for printing on an object of some thickness, for instance, a book. 'Ihe nut 25 is moved outwardly until the teeth 2 I-22 are disengaged. The heating element, type holder and plunger are then moved upwardly the required amount' and the operating lever is locked to the shaft by engagement of the teeth 2I---22.` The stroke of the operating lever will thus be the same and the variation in thickness compensated for.

After the operating lever 2U has been pulled forward for the printing operation as illustrated in Fig. 1, a spring 3I returns it to its rearward position. Limiting stops 2'I and 28 are providedY and these stops engage abutments 29 and. 30, of which the forward one 30 is preferably adjustable.

A supporting arm is secured to the rear side of the heating element I6. This arm carries at one end a reel 36 for the roll of inked strip 3'I and at the. other end the strip feed adjusting device 38 which will now be described.

The inked strip is led between a pair of feed rollers 39 and 40. The larger roller 39 is mounted on a spindle 4I carried by the supporting arm 35. The smaller roller 40 is freely mounted on a short shaft carried by the lever 42 which is pivoted at 43 to an upwardly extending portion of the supporting member 35. The feed roller 4I) is held in engagement with the roller 39 by a spring 44. The lever 42 is provided with a finger piece 45 to facilitate raising the roller 40 when the inked strip 3'I is initially introduced.

At this time it will be well to follow the path of the inked strip and attention is called to Fig. 3. The strip passes from the reel 36 under a depending foot 58, thence between the type hold-N er and platen and under another depending foot The members 50 and 5I aremounted in" downwardly extending parts 52 of the supporting member' 35 and springs 53 urge the members 58 and 5I toward the work sup-porting plate 22.

Theroller 39 has an inwardly extending zange 55 (seeFig. 5) which has a bearing .on a sleeve 56. The sleeve 56 has at its inner end a flangedv shell 51 and secured to its outer end is a beveled disc 58. The bevel of the disc 58 has suitable graduations 59 and the disc is provided with a knurled knob 69 for manipulating it. A lock nut 6I threaded on the outer end of the spindle 4i holds the parts in position.

'I'he roller 39 has an internal annular ratchet 65 and part of this internal ratchet is covered by the flange 66 `of the shell 51. A disc 61 freely mounted on the spindle 4I carries a pawl 68 which is pressed by a spring 69 into engagement-with the ratchet teeth 65. The disc 61 has secured to it a, gear 16 which meshes another gear 1I carried by the supporting member 35.

The gear 1I is in mesh with a gear segment 12 pivoted at 13 on the supporting member 35'. Pivoted at 14 to the gear segment 12 is a rod 15. This rod passes through and is held in a Vstud 16 mounted in ears 11 carried by the overhanging armE I I. A nut 18 provided with a nger piece 19 clamps the stud 16 to prevent vertical movement of the rod 11 and segment 12. When it is desired to raise or lower the heating element and type holder to accommodate varying `thicknesses' of material to be printed on, the nut 18 is loosened to permit the rod 11 to slide in the stud When the requiredA adjustment has been made the nut is again tightened. As the plunger I2 vis moved downwardly the gears 18, 1I and the' disc 61 will always be moved the same amount for each cycle of operation.

When the graduated disc 58 is moved to zero in relation to the indicator the flange 66 of the shell 51 will cover all the ratchet teeth 65 which the pawl 68 will traverse in that cycle of voperation. Therefore there will be no rotation of the feed rollers 39, 48. When the bevel disc 518 is turned,.for instance, to one inch, as illustrated in Fig. 3, the flange 66 will be rotated sufficiently so that the end BI of the cutout portion of the flange will expose the right number of ratchet teeth 65 4to the action of the pawl 68 to revolve the rollers 39, 48 the correct amount to feed exactly one inch of the inked strip 31. The flanged shell and its connecting sleeve are particularly. illus'- trated in Fig. 4.

As heretofore stated the reciprocable plunger I2 moves the same amount for each cycle of operati-on and the pawl 68 through the medium of gear segment 12, gears 1I, 18 and disc 61 has the same amount of rotary movement on each cycle. As the plunger I2 moves downwardly the pawl 68 will ratchet past the exposed teeth 65 and then move on the inner side of the flange 66. `On the upward movement of the plunger I2, the pawl 68 will slide back on the inner side of flange 66 until it comesto the end 8| .of the cutout portion of' the `thickness of material to be printed on.

vtime to complete the printing operation.

ange when it will engage the exposed teeth 65 and rotate the feed rollers the proper amount in accordance with the setting of the graduated dial 58; This will advance exactly the required amount of inked strip 31 for the next printing operation It will thus be apparent that adjusting the amount of inked strip to be fed is a matter of extreme simplicity. Machines of this character are generally used for a great number of small jobs during a day. Therefore it will readily be seen this matter of adjusting the amount of inked strip to be fed is of prime importance both as to v.economy in the amount of strip used and as to efficiency of the machine due to giving it a greater number of working hours during a day.

To further increase the eiiiciency of the machine a novel form of type holder has been devised. The type holder I1 comprises a rectangular frame having suitable well known means therein for holding the type or die 85. The side pieces of the heating element I6 have open ended slots 86 (see Fig. 2) into which the studs 81 of the knobs 88 enter when it is desired to position the type holder. The side pieces are turned in their lower edges as indicated at 89 to provide guides or .ledges for the type holder. cured to the under side of the guides 89 and the guides have apertures through which humps or Springs 96 are seoiTset portions 9| on the springs may pass and engage the under sideY of the type holder so as to frctionally hold it in position. A knob or handle diately upon the machine finishing one job the z hot type holder is removed and a new one inserted for the next job.

Suitable adjustable stops such as indicated at feeding machenism may be used in conjunction with the machine.

From the foregoing it is thought the operation will be clear. However a brief rsum of same will be given. The type holder is prepared and positioned as heretofore described, it being understood the heating element has been brought up to the proper temperature. The indicator dial 58 is set for the required length of inked strip needed and the proper adjustment has been made for the The material to be printed on is inserted over the platen I9 and the operating lever 20 is pulled forward. The plunger and its associated parts are moved downwardly and the type or die is held against the inked strip for a sucient length of operating handle 28 is then released and the spring 3| causes the parts to return to normal position. As heretofore described, on the upward movement, the strip feeding means advances the correct amount of the inked strip for the next in the art are to be considered as coming within vthe spirit of the invention as dened in the appended claims.

The`

I claim:

1. A hot press printing machine having in combination a vertical reciprocable plunger, means for reciprocating said plunger, a heating element carried by said plunger, a type holder secured to said heating element, a roll of inked strip movable with said heating element, and a strip feed adjusting device movable with said heating element, said strip feed adjusting device comprising a pair of feed rollers, means for rotating said -feed rollers operable by the reciprocable movement of said heating element and its associated parts, an internal annular ratchet on one of said feed rollers, and means whereby one or more teeth of said ratchet may be acted upon whereby the amount of rotation of said feed rollers may be controlled.

2. A hot press printing machine having in combination a vertical reciprocable plunger, means for reciprocating said plunger, a heating element carried by said plunger, a type holder secured to said heating element, a roll of inked strip movable with said heating element, and a strip feed adjusting device movable with said heating element, said strip feed adjusting device comprising a pair of feed rollers, means for rotating said feed rollers operable by the reciprocable movement of said heating element and its associated parts, an internal annular ratchet on one of said feed rollers, and means whereby one or more teeth of said ratchet may be exposed to the action of a pawl so as to control the amount of rotation of said feed rollers.

3. A hot press printing machine having in combination a Vertical reciprocable plunger, means for reciprocating said plunger, a heating element carried by said plunger, a type holder secured to said heating element, a roll of inked strip movable with said heating element, and a strip feed adjusting device movable with said heating element, said strip feed adjusting device comprising a pair of feed rollers, a spindle on which one of said rollers is mounted, an internal annular ratchet on said roller, a flanged shell covering said ratchet and having part of its flange cut away to expose some of the ratchet teeth, a pawl adapted a ride on the inner side of said flange and engage such teeth as may be exposed, means for r tating said pawl, said means being operable by the reciprocable movement of said heating element and its associated parts, and means for manipulating said anged shell so as to expose one or more teeth to the action of said pawl.

4. A hot press printing machine having in combination a vertical reciprocable plunger,

- means for reciprocating said plunger, a heating element carried by said plunger, a type holder secured to said heating element, a supporting bar attached to said heating element, a roll of inked strip carried at one end of said supporting bar, a pair of inked strip feeding rollers carried at the other end of said supporting bar, one of said feed rollers being an idler roller and the other a driven roller, a spindle for the driven roller, an internal annular ratchet on said driven roller, a flanged shell covering said ratchet and having part of its flange cut away to expose some of the ratchet teeth, a pawl adapted to ride on the inner side of said flanges and engage such teeth as may be exposed, a disc on which said pawl is mounted, a chain of gears to rotate said disc, said chain of gears being operable by tht reciprocable movement of the heating element and its associated parts, and means for manipulating said iianged shell so as to expose one or more teeth to the action of said pawl.

5. A hot press printing machine having in combination a vertical reciprocable plunger, means for reciprocating said plunger, a heating element carried by said plunger, a type holder secured to said heating element, a supporting bar attached to said heating element, a roll of inked strip carried at one end of said supporting bar, a pair of inked strip feeding rollers carried at the other end of said supporting bar, one of said feed rollers being an idler roller and the other a driven roller, a spindle for the driven roller, an internal annular ratchet on said driven roller, a flanged shell covering said ratchet and having part of its flange cut away to expose some of the ratchet teeth, a pawl adapted to ride on the inner side of said flange and engage such teeth as may be exposed, a disc on which said pawl is mounted, a gear secured to said disc, a segmental gear pivoted on said supporting bar, a rod pivoted to said segmental gear at one end and having its other end fixed as to vertical movement, the arrangement being such that when the plunger and its associated parts are moved downwardly the pawl will latch past the exposed ratchet teeth and when the plunger and its associated parts are moved upwardly the pawl will engage such teeth as may be exposed and move the driven feed roller a corresponding amount, and means for manipulating said flanged shell so as to eX- pose one or more teeth to the action of said pawl.

6. An inked strip fee-d1 adjusting device for a hot press printing machine, said device having in combination an idler feed roller and a driven feed roller, an annular internal ratchet on said driven roller, and means for exposing one or more teeth of said ratchet to the action of a driving pawl.

'7. An inked strip feed adjusting device for a hot press printing machine, said device having in combination an idler feed roller and a driven feed roller, an annular internal ratchet on said driven roller, a iianged shell covering said ratchet and having part of its flange cut away to expose some of said ratchet teeth and means for manipulating said flanged shell so that one or more teeth o-f said ratchet may be exposed to the action of a driving pawl.

8. An inked strip feed adjusting device for a hot press printing machine, said device having in combination an idler feed roller and a driven feed roller, an annular internal ratchet on said driven roller, a flanged shell covering said ratchet and having part of its ange out away to expose some of said ratchet teeth and a graduated disc connected with said anged shell so that rotation of said disc will expose one or more teeth of said ratchet to the action of a driving pawl.

9. A hot press printing machine having in combination a vertical reciprocable plunger, rack teeth cut on said plunger, a pinion engaging said rack teeth, a shaft on which said pinion is secured, an operating lever freely mounted on said shaft, teeth on the face of the operating lever hub, a oollar splined to said shaft, teeth on said collar to engage the teeth on said operating lever hub, a nut threaded on the end of said shaft, a heating element carried by said plunger, a type holder secured to said heating element, a roll of inked strip movable with said heating element, and a strip feed adjusting device movable with said heating element.

CHRISTIAN GABRIELSEN.

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