US2595233A - Selvage guiding and drying apparatus - Google Patents

Description

May 6, 1952 J. DUNGLER 2,595,233

SELVAGE GUIDING AND DRYING APPARATUS Filed Feb. 17, 1950 2 SHEETS--SHEET l I i WM! /96 May 6, 1952 J. DUNGLER SELVAGE GUIDING AND DRYI NG APPARATUS Filed Feb. 17, 1950 2 SHEETS-SHEET 2 I 'atented May 6, 1952 UNITED STATES PATENT orrlce SELVAGE GUIDING AND DRYING APPARATUS ulien Dungler, Basel, Switzerland Application February 17, 1950, Serial No. 144,695

- The present inventin relates to an apparatus for treating, in particular drying, the selvedge or like border edges of sheet or web materials in a continuous operation and as the material passes through the apparatus.

- A primary object of this invention is to provide means affording adaptation of the apparatus of the aforesaid type to any changes in thelocation or extent of the selvedge and automatic adjustment of the treatment zone of the apparatusto such changes so as to insure continuity of treatment. Y

Another object of the invention is to provide means orienting the treatment or heating element or elements along which the treatment zone extends so that the treatment element will remain in operative engagement throughout its entire length, with one or both opposite edges of the material to be treated, as the case may be,.even while substantial variations in the width and/or position of the material occur.

A further object of the invention is to provide means enabling the treatment element to follow and assume a position parallel to or commensurate with the edge or edges of the material to be treated even when the latter is inclined with respect to the direction of movement of the sheet or web material.

Still another object of the invention is to providemeans rendering working condition and function of the apparatus inoperative whenever the displacement or adjustment of the treatment elementvor elements tends to become excessive and threatens the orderly functioning of-the apparatus;

' Yeta further object of the invention is to provide means controlling .the power supply of the apparatus so that the latter will be arrested whenever the configuration of the edge of the web material under treatment necessitates entirely difierent working conditions of the apparatus than those for which the latter has been initially set; i

11 The'invention is particularly, though not exclusively, applicable to apparatusfor drying the selvedges of apretreated fabric material to facilihtatef engagement thereof by tentering clips during-a'subsequent treatment.

specification. ""The apparatus according to the inven is described with reference to the accompanying drawings, in which:

s 12 Claims. (01. 34-48 2 V I v Fig. 1 is a front elevation of an apparatus embodying the invention;

Fig. 2 is a side elevation of the apparatus shown in Fig. l; t

Fig. 3 is a circuit diagram illustrating the operation of the limit switch and follower means; and

vFig. 4 is a detail view of a switch forming part of the follower means. 7

Referring now more particularly to Figs. 1 and 2 .of the drawings, thereis disclosed an apparaQ- tus I0 comprising two standards I la, IIb between which extends a set of spaced rollers I2, I3, I4 and I5 journaled on these standards. A web of cloth material I6 passes around the first roller .I 2', subsequently around a weight roller I! to keep said material in desired tension, thereafter over rollers I3, I4 and finally along rollers I5, as indicated by the arrows A in Fig. 2. In order to maintain the roller I] in its horizontal position,

the same is floatingly supported at its ends by two endless transmission means I811, [8b which pass around'pulleys I911, Ilsa and [9b, II9b, respectively, the pulleys I911, I922 being fixed on a shaft I9 and the pulleys IIQa, II 9 b being fixed on a shaft H9 for simultaneous rotation.

The left-hand standard I la, has secured thereto an upper bracket 2.0a, a lower bracket [20a and a platform 2 la on which latter rests amotor 22a; similarly, the right-hand standard ,IIb-has secured thereto an upper bracket 20b, a lower bracket I2Bb and a platform 21b with a motor 21) resting on the latter. The brackets 20a and Zilbare interconnected by a pair of parallel rods 23,24 which attheir center support a block 25;

inanalogous manner the bracketsl20a and [20b are interconnected by a pair of parallel rods I23, I24 which at their center support a block I25.

Lodged in the upper left-hand bracket 20a and in the upper block 25 is a threaded spindle 26a which passes through and meshes with an internally threaded slide 21a displaceably supported on the rods 23, 24; similarly, there is lodgedpin the lower left-hand bracket I20a and in the lower block I25 a threaded spindle I26a which passes through and mates with an internally threaded slide I2'Ia displaceably supported on the rods, I23,

The arrangement on the right-hand side of the apparatus is identical, with a spindle 26b lodged in bracket 2% and supportedin block 25. while threadedly engaging. a slide 21b, and with: a'spin-, dle [26b lodged in bracket I2flb and in block.I25 while threadedly enga'ginga slide I211). The free, outer end ofeach spindle 2611,2612, 126a and 12Gb carries a pair of pulleys 28a, 29a; 28b, 29b;/I2.8d,

ly rotatable thereon and may be selectively coupled to the spindle by a magnetic clutch generally indicated at a, 30b, I39a and I302), respectively, details of which will be described in connection with Fig. 3.

When the motor 22a is energized, the outer pulleys 28a and HM are rotated in afirst direction (e. g. clockwise and counterclockwise, respectively, as viewed in Fig. 2) by means of a pulley 3Ia and a belt 32a having one cross-over point,

while the inner pulleys 29a and llilaaredriven in the opposite direction (e. g. counterclockwise and clockwise, respectively) by means. of a pulley 33a and a belt 34a having two cross-over points. The arrangement on the right-hand side; of the apparatus is analogous and includes motor pulleys 3Ib, 33b and belts 32b, 3411.

Associated with the selvedges IIBa, IIGb of the endless cloth material I6 are treatment elements 35a, 3512, respectively, each element consisting essentiallyof an inwardly open, elongated drying channel provided with heaters, such as indicated b'y'numerals 36a, 3l'a- (Fig. 2) adapted to lie on and cover opposite sides of the-cloth material when the respective selvedge passes through the channel. Each drying element 35a, 35b is provided at its lower end with a lug- I39a, I391), respje'ctively,v pivoted at I3Ba, I382) to respective lov've'r slides- I2 'Ia, I2'Ib. On its upper end the drying elements are provided withlugs 38a, 39b, respectively, having each an elongated slot engaged-bya pin 38a; 38b extending from the slides 2 l a g 2 lb-,respectively.

Also-secured to each-of the slides 27a, 21b, I2la, l-2;'Ib is a respective bracket 43a, 40b, Idila, I482) carrying a shoe Ma, Mb, I4Ia, I4Ib displaceable relative-thereto by means of a-hand-wheel 42a, 4217, 2a. I42b,respectively. Each of these shoes c'arriesa follower member comprising a base 43a, 43b, I43a, I43b, respectively, to which there is resiliently secured apressure foot 44a, Mb, I440: and} IMb for yieldably holding thecloth IS in contact-with-the base. Each follower member includes a feelerarm 45a, 45b, Mia and I45b, respectively, adapted to be engaged by the selvedge of th'ecloth-and to be displaced by it commensurate with its changes in the selvedge, as more clearly-apparent'from Figs. 3 and 4.

Fixed to the-rods 24 and I24,externally of the slides'il 21b and-I21a, I2'Ib, are fouridentical limit'switches-46a,-46b, I-46a and I462) adapted to cooperate with the associated slides as will be more" fully described in'connection with-Fig. 3.

It will thus be seen-that theapparatus. Ifl com-.

prisesfour identical controllers whichconsist of clutches'30a, 30b, I30a and I381), followermembers-43a, 43b, I-43a and I43band limit. switches 43a, 46b, MSa and'HSb, respectively.

The circuit shown in Fig. 3 comprisesa number of elements common tothe-four controllers. re-. ferred to, including a transformer and rectifier unit a start relay-48, astop relay 49, a1s'tart button I 48 and a stop buttonv I49.

A. source 50' of alternating current; supplies power, viathe transformer circuiti'ua. to a-.-pos'i-.. tive bus bar 5i and a negative bus bar 52. Also shown in Fig. 3, byway of example, are the spindle26a with its associated clutch 39aand'pulleys z-sa, 29a, the follower 43a with its feelerarm 45a, and the. limit switch 46a cooperating with slide 21a. The selvedge IIBa is in contact with feeler arm Haas-previously explained.

Turning to Fig. 4 for adetailed description of thefour identical follower members I (here. themember.-43b)., itwill be. seen that thearm. 45b

carries a movable contact 53b adapted to cooperate with either of two stationary contacts 54b, 55b positioned on opposite sides thereof. Arm 45b is pivoted to the base 431) at 56b and is biased by a spring 51b toward engagement of its contact 531) with the stationary contact 54b.

The selvedge IIEb, on the other hand, bears upon and slidably engages the arm 45?) so as to limit the displacement of the latter by thespring 57b and, under certain conditions subsequently pointed out,-to swing this arm about its pivot 56b for engagement of contact 53b with contact 55b. The corresponding contacts of follower 43a are shown in Fig. 3 at 53a, 54a and 551;, respectively.

Thelimit switch 46a (Fig. 3), has two stationarycontacts, 58a and 5911, a movable armtfla and a pair of movable contacts Bla, 62a carried on the arm Gfia. A spring 6311 urges the arm 60a toward theslide 21a and toward engagementof contact BZIrwith contact 59a. When,.however. theslideila. bears upon the projectingend of, arm 68a, under conditions that .will subsequently become apparent, contacts 59a, 62a are broken and contactsjfla, BIa become engaged to establish a circuit, as will be later described.

Theciutch 3iia comprises a pairof solenoids 63a, 640. provided with slip rings 55a,..66a.an d 61a, 88a, respectively, forming. part of their lie-.- spectiveenergizing circuits. Thetwo solenoids act upon a collar 69a, slidably keyed to the spindie 26a, whichcarries a disk armature 10a. The two pulleys. 28a,.29a are provided with solenoid cores 7 Id, 52a facing the disk 10a. thedisk'being normally spaced from. these cores. unless said diskis drawn. toward one. or the. other of. the pulleysupon the energization of. the. respective solenoids. Asabo've. pointed out the two. pulleys rotate in opposite directions; accordingly, energization of one or the other solenoid 63a--'Ila; or Ii4al'2av will result in the rotative entrainment of. disk 18a and spindle 26a in one or the other direction.

Feeler arm 4.5a is connected to the positive bus bar 5|, in parallel with the other feeler, arms; by way of the front contact of the upper armature of start relay 48. This relay has an energizing circuit leadingiromthe positive bus bar 5I over its winding and conductor 73' to start button I48, thence viacontacts 59a,.62a.of thelimit switch. 46a; and corresponding contacts of the other limit switches in series therewith toythe nega' tivebus' bar 52.

Stop relay 49 has an energizing circuitleading from the positive busbar SI over; conductor 14. stop button M9; winding of relay 69 to negative bus bar 52.v The stop button I49 is shunted by'a circuittraceable from bus bar 5| over the upper armature of relay i8, feeler arm-45a, contacts5-3a and-55a, contacts 58a and fila to the winding of relay 39.

The center armature of relay 48 serves to estab: lish. a locking circuit. for the latter over the armature and back contact'ofrelay 49, while. the lower. armaturev of relay 48 .closesa circuit for energizing the feed motor (nOtqShOWIUf to ad. vance the cloth material IGzwhen this. relay is energized. The. rings 65a and 51a :are; connected to thenegativebus bar 52, as; shown; rings 66a and 68a: are. connected to stationary contacts 5% and 55a, respectively, of the follower; member 43a.. Y

The operation of the arrangementdescribejd above is. as follows:

When the. start button I481: ismomentarily pressed, relay 48 is energized in thecircuitapreyie ously traced and looks over the armature and back contact of relay 49.

Power is supplied to the feed motor and also to motors 22a, 22b which may be connected in parallel therewith or, if desired, may be continuously and independently energized. At the same time the feeler arm 45a (and the corresponding arms of the other follower members) is connected to potential at the upper armature of relay .48. It has been assumed that the limit switch 46a remains neutral, its contacts 59a, 62a being normally closed. The same is true of the other limit switches 4622,1461: and I46b, this being a necessary prerequisite for the operation ofthe start relay 48.

As long as the selvedge HBa maintains the feeler arm 45a in such a position as'to keep its contact 53a out of, engagement with either of the contacts 54a and 55a, no further change will take place in the circuit of Fig; 3 as the selvedge of the advancing fabric passes continuously between the heating coils or means 36a and 31a of the treatment or drying element 35a, this being the position illustrated on the left-hand side of Fig. 1 and in solid line on the right-hand side thereof.

Under these conditions both selvedges of the fabric material will remain operatively engaged with the respective drying elements 35a, 35b and the treatment will proceed in a continuous manner and operation. If it be desired to stop the operation of the machine for some reason, actuation of the stop button I49 will momentarily energize stop relay 49, thereby breaking the holding circuit of start relay 48 and de-energizing the feed motor. It is also contemplated by this invention to cut off simultaneously. the circuit for the heating means.

Let us assume, however, that the width of the advancing fabric I6 is subject to change, as indicated in dot-dash. lines in Fig. 1. Thus, if selvedge llBb starts to recede, spring 51b (Fig. 4) is enabled to close the circuit through contacts 53b and 54b by swinging the arm b counterclockwise. This will immediately energize one of the solenoids ofclutch 30b, resulting in a rotation of spindle 261) so as to displace the slide 21b towardthe left (Fig. 1), this movement in turn entraining the follower 43b as well as the upper end portion of drying element or channel 35b.

In analogous manner the lower end of the channel 35b will be displaced when the discontinuity in the selvedge l [6b reaches the follower 43b, so that this channel or treatment element will be caused to assume the dot and dash line position indicated in Fig. 1 registering with the particular configuration or inclination of the edge of the cloth. Had the width of the cloth material increased instead of decreased, the other solenoid of clutches 30b and [38b would have been energized, thus resulting in an outward displacement of the slides 21b and IZlb.

The energization of these solenoids will be clearly apparent from Fig. 3 from which it will be seen that engagement of contact 53a with contact 54a closes the circuit through solenoid 63a|la while engagement of contact 53a with contact a closes, however, the circuit through solenoids Met-42a.

If, on account of inertia, the follower overshoots the point in which its feeler arm is just centered with respect to the associated stationary contacts, the direction of rotation of the spindle will be reversed and the controller will "hunt until the correct: position has been. reached. 7111 extreme cases, this hunting" may carry some or more of the slides, say, 21a, into a position in which it engages the switch arm 68a of the asso, ciated limit switch 46a.

This will break the energizing circuit of start relay 48 but, since the latter is locked, nothing further will happen since under such conditions the contact 53a will not-be in engagement. with contact 55a, relay 49 thus remaining unoperated. If, however, the actuation of the limit switch has been due to an excessive widening ofthe fabric or other disturbing causes resulting in an outward displacement of the selvedge 6a beyond ac-predetermined limit, such actuation of the. limit switch 46a will coincide with the feeler arm 45a occupying an extreme off-normal position, .so that the relay. operates in the .circuit previously traced which includes the contacts 53a, 55a*-o the follower member and the contacts 5811, 6; of the limit switch.

The release of the start relay .48 thereupon stops the feed motor and removes potential from the feeler arm 45a, thus de-energizing the solenoid 64a and arresting the spindle 26a. Because the starting circuit has been opened at contacts 59a, 62a, actuation of start button I48 will be without effect until the operator has corrected the work-.- ing condition and situation giving rise to the interruption. z

It should benoted that the invention is capable of numerousmodifications and adaptations witlr-'v out exceeding its scope. Thus it will be possible to provide additional limit switches, similar to the switches'46a, 46b, [46a and I46b, positioned so as to prevent excessive inward displacement of the drying elements 35a, 35b and associated parts; in order to guard against possible damages to the machine in theevent the start button I48 is actuated with no web material IS in place.

Such a switch, which in analogy with the foregoing description may be arranged to become operative only upon the feeler arm occupying a position such as to tend to displace the associated slide toward the center (the position illustrated in dot-dash lines in Fig. 4, with-the feeler arm 45b engaging contact 54b), could also-operate to stop the feed motor (and, if desired, the motors 22a and 22b), thus preventing useless power consumption by these motors. i

It may also be mentioned thatpif interruption of the feeding movement by means of the limit switches is not necessary or desired, there ma y be provided individual start and stop relays, such as 48 and 49, for each limit switch and follower member, soithat each clutch mechanism will'b'e inactivated only when the particular selvedge engaged by the associated feeler arm moves out of bounds.

Having thus described the invention, what is claimed as new and desired to be secured by Letters Patent, is:

1. In an apparatus for continuously treating an edge of an advancing web material, in combination, a treatment element engageable with said edge, actuating means operable to displace said treatment element, and follower means controlling said actuating means to maintain said treatment element engaged with said edge upon displacement of the latter, said follower means including a feeler member in contact with and displaceable by movements of said edge.

2. The combination according to claim 1. wherein said follower means comprises spring i an edge of an advancing web material, income hination. ;a treatment element engageable with said..edgc, first drive means adapted .to displace said-treatment element toward said edge, second drive means adapted to displace said treat:- ment element away from said edge, said treatment element -being normally disengaged from both of said drive means, coupling means so,-

decti-yeIy operable to. engage said treatment ele- ,ment with either .of said drive means, thereby displacing said treatment element in a respective direction. and follower means-mechanically con.- wpledwith said treatment element for simultaneous displacement, said follower means includeinga first and -.a second set of contacts, a feeler member having :a first :position in which .said nrstzset of contacts are closed, thereby actuating said coupling means to engage said treatment element with said second drive means, and a third position intermediate said first and second positions in which neither of said sets of con.- :tacts :a-ne closed, thereby maintaining said treat.- .ment element disengaged from both of said drive means, said :feejler member "being engages able by said edge and displaceable thereby ,torwardisaid Second position, said follower means :being wproyided with spring -means urging said feeler :member toward said first position, said ieeler:memloer:beingi aligned with said treatment element :to maintain the latter in operative en.- ,gaeement with saidiedge when the ,feeler element is ;held in said intermediate position by contact with said edge.

'7. The combination accordingto claim ineluding i im t witc 'imeans op rable to disable sa d coupli g insa e on said eatment e em m ireachine e treme pos t on an said Jeiele membe s m aneous o cup ng a p siementberon saidnre te mined pos t o viticnsurh as toitendt d ive sa d eatm ieler .8. The combination according to claim '7, wherein said limit switch means operates to stop'the advance of said material simultaneously with disabling said coupling means.

9. In an apparatus for continuously treating an edge of an advancing cloth material, in com; bination, an elongated treatment element en,- gageable with a predetermined length of said edge, first actuating means coupled with one end of said treatment element and operable :to dis:

a place said one end, second actuating means .cou:

pled with the other end of said treatment element and operable to displace said other end. first follower means controlling said first actuating means to maintain said one end engaged with said edge upon displacement of .the latter, said first follower means including afirst feeler {meme ber connecting said edge adjacent said one end and displaceable by the movement of said edge. and second follower :meanscontrolling said seclond actuating means :to maintain said other end engaged with said edge upon displacement of .the latter, said second follower means including a second vfeeler member contacting said edge ad,- jacent said other end and .displaceable by move: ment of said edge.

10. The combination according to claim 9, wherein said firstand second follower members are mechanically coupled with said one .end and said other end of said treatment element-respectively, for simultaneous displacement.

11. The combination according to claim 9, wherein said treatment element comprises a .U.- shaped channel for receiving said edge, and heater means within said channel.

2. "The combination according to claim 11, wherein said heater means includes .a pair of elongated heating elements positioned on opposite sides of said edge within said U -shaped channel.

JULIEN DUNGLER.

REFERENCES ,CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS 2,355,391 Nelson et a1. Aug. ,8, 11944

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