US2620641A

US2620641A - Method and means for the preparation of sample cards carrying knotted sample threads

Info

Publication number: US2620641A
Application number: US127010A
Authority: US
Inventors: Erb Ernst
Original assignee: Individual
Current assignee: Individual
Priority date: 1948-11-30
Filing date: 1949-11-14
Publication date: 1952-12-09
Anticipated expiration: 1969-12-09

Description

Dec. 9, 1952 E. ERB

METHOD AND MEANS FOR THE PREPARATION OF SAMPLE CARDS CARRYING KNOTTED SAMPLE THREADS 2 SHEETS-SHEET 1 Filed NOV. 14, 1949 INVENTOR ERNST ERB, BY lu/em/el-off Z/mf v Enact ATTORNEYS Dec. 9, 1952 ERB 2,620,641

. METHOD AND MEANS FOR THE PREPARATION OF SAMPLE CARDS CARRYINGKNOTTED SAMPLE THREADS Filed NOV. 14, 1949 2 SHEETS-SHEET. 2

INVENTOR ERNST ERB,

. I 7 BY waht fo/ Z/WQ/ h0 -k ATTORNEYS Patented Dec. 9, 1952 'TIoN OF SAMPLE CARDS CARRYING KNOTTED. THREADS Ernst Erb, Basel, Switzerland Application November 14, 1949, Serial No, 127E141 In Switzerland November 30, 1948 I Claims.

Hereto'fOr "and en ra i speak n a e cards are made by knot/ting sample thr'eadsor yarns of woolen and the like textile material i side the perfora ions o hole pro on edges of the sample cards so as to drop in front of the latter.

AS the knott'ing of threads was heretofore done exclusively by hand, the procedure consisted m r ly in uin the hr ads a yarns on t cards the case of mass production. This forms the most rational metho nd c n sts in that the threads or yarns fed by warps prepared previously are glued between the actual sample card and a strip. overin ame le h d fi threads and yarns are cut to the desired length. This method has, however, the drawback that the sample cards obtained have an appearance that is poor with reference to sample cards carrying knotted threads.

For t u p se i as, en re d a tempted to execute mechanically the knotting of the threads over the perforations of a periorated strip, the threads being fed as precedingly from previously prepared warps. But such attempts have met with various 'difiicult'ies leading alWa-YS t0 faulty operation. Thus the hooks that are intended to draw the threads through the perforations in the perforated strip in order to give them a loop shape cannot, by reason of the reduced diameter of the perforations, have a size sufficient for producing a wide enough loop. As a consequence, the members that are to fetch the ends or the threads after passing through the loops fo returning them again through said loops for fastening them cannot always be introduce'd through such narrow loops with certainty which prevents reliability in operation. It has, therefore, been proposed to provide further memhers such as pointed wedges inside'the loops for widening same. But this leads in its turn to a greater number of operative steps and makes the plant -a more intricatfi one. I

Furthermore, it is not possible to obtain with such spacing or loop-opening means aper'fectly reliable operation as the tips of the pointed wedges cannot reliably engage the loops when one of the hooks is shifted even to a very small extent out its actual normal position. Similarly, the different prior khotting methods have lead to substantial losses of the material to be knotted I by reason of the hanging threads requiring a subsequent cutting to a uniform length which m a ls a fur er ope ative step.

Now, my invention has for its object a novel method and means for solving the above dis 2 closed problem and cutting out all the causes or faulty operation. It is possible, thereby, to provide in sh'ojr "succession-for the knotting of threads over emigrant strips, the threads being fed from -a previously f rmed war without this leading to any loss o? material.

In accordancew i th method, the novel idea consists in that there are used for drawing the loops through the perforations of the sample card, two combs that are independent from one another and the superposed hooks of which are moved in the-same direction so as to pass through the perforations in the 'perforated strip and to catch the warp tn-roses aovanem' in front of said combs in order to give said threads simultaneously the shape of loops. Thus there are always two combs hanging on the lohp's "thus formed of which one "serves-rerholding' the While the other coin'b fetches the ends of the threads and pulls them through the loops. As the second comb has already engaged the loops through hooks, before it has taken hold of the warp thread ones, it is an easy inatter to move it reliably through said loops so that it may'take hold 'of the "two ends of the thread. corresponding to each loop, which ends have been laid during thfs'fiist operative step side by side over the front of the per-rotated -stri'p, said comb then drawing the thread emas through the loops that are held in place by the other card. A tightening of the loops at the end or the operation ensures the final iastening of the threads over the perforations of the sample card.

In other words, two independent combs hold in place 'tnepreviousry formed 160115 by "means of one of Said comhswhiie the-other'eomb is then caused to pass through the loops and to engage through itshooks the ends Of the threads that are hold fast for this purpose, the last mentioned Comb urging then said thread ends over the edge of the perforated strip into the loops thus held by the first comb.

The novel features of the arrangement acco'rd-ing to my invention and its operation are disclosed hereinafter, referen e being n'i-a'de to accompanying erawines, wherein:

Fig; 1 is anew from above, partly sectional, of a comb adapted to take hold 'of the threads.

Fig. 2 is a view from above or a eom piete arrangement accorsmg t0 invention, illustrated at the moment at which a tomb carries the war threads O'Vi the perforated strip that has been introduced into a support or sai airangern'ei i't. e 1 A mg. 3 illustrates disseminate-any han the means provided for holding the perforated strips during the knotting operation.

Fig. 3a is a view, in end elevation, corresponding to Fig. 3.

Figs. 4, and 6 are diagrams adapted to illustrate the actual operations of the knotting means.

The arrangement includes five similar threadengaging and clamping combs including a number of hooks provided each with a pressing or clamping member. The combs designated respectively as 1a, 1b, 1c, id, is are all similar to the comb i illustrated in detail in Fig. 1. They are intended to catch and hold the warp threads and to draw said threads through the perforations in the perforated strips in order to form the desired loops and finally they are used for returning the ends of the threads through the loops formed by them to secure said threads in the perforations of the perforated strip.

Turning again to Fig. 1,! designates the actual comb body, 2 the hooks rigid with the latter, 3 the pressure members sliding vertically in openings provided in the comb and 4 a rail or the like member rigid with the different pressure members for controlling their simultaneous rising and sinking movements.

The hooks are rigid with the comb body E while, as stated, the pressure members may slide in the openings provided in said comb body.

The books 2 and the presser members 3 are distributed in accordance with a predetermined law of distribution corresponding to the distribution provided for the perforations in the perforated strip on which the sample threads are to be knotted. Fig. 1 illustrates the presser members 3 in their open position on the left hand side of said figure, while the right hand side of the comb shows sectionally the presser members 3 that are supposed to lie in their closed position for which the threads are clamped. Between the two halves of Fig. 1 is illustrated sectionally a presser member that has been submitted to a pivotal movement by 90 in order to appear in side view. Said part of Fig. 1 shows how the upper flange of the rail t engages the recess 5 of the rod 6 of the presser member 3 with the insertion of a spring 7 between the lower flange of the rail 4 and the lower end of the rod 6. Said spring '5 is wound over a stud 8 forming a lower extension of reduced diameter on the rod 6 of the presser member and the different springs l are designed in a manner such that the total power that may be exerted on the rail 4 may be distributed uniformly throughout the presser members whereby I the latter are allowed to clamp threads of different thicknesses between the hooks and the corresponding presser member heads.

The rail 4 or the like member may be controlled pneumatically, electromagnetically, mechanically or else by hand as illustrated in the example of Fig. 1 where it is supposed that it is controlled through the agency of the lever It. It is therefore not necessary to describe with further detail the arrangement for controlling said rail The presser members 3 are obtained through bending of a wire. They are guided in corresponding openings or grooves of the comb body and their heads 9 are guided over the stems H of the hooks 2. For this purpose and also for providing a suitable clamping of the thread, the head 9 of each presser member is centrally slotted at l2, so that said presser member may clamp the thread to either side of the book 2 engagin said slot.

In order to clamp in a uniform and gradual manner the threads lying on the hooks, the heads 9 of the presser members are provided with an oblique surface obtained through a mere bending or folding deformation.

The tips of the hooks when closed over the presser member head engage the slot I2 in the corresponding presser member head. These hook tips are actually covered to either side thereof by the surfaces of the presser member heads facing them. This is in particular the case for the comb 10 (Fig. 6) so that the latter cannot engage and remain in hanging relationship inside the thread loop when it is urged back through said loop.

Fig. 3 shows a detail of the means for holding the perforated strips during operation. It consists chiefly in a carrier plate it provided with teeth I5 the distribution of which corresponds to the distribution of the hooks on the combs, the tips of said teeth being folded back so that the perforated strips I3 may be slidingly engaged underneath said tips and be thus held over the plate 14 throughout their length through their upper surface. In the case of perforated strips of different lengths, there are provided to either side of the latter stops I6 (Fig. 3) carrying spring blades I1 and capable of being mounted selectively in either of the perforations provided to this purpose at [8, [3. The tongue 29 terminating the spring blade l? is bent downwardly and bears yieldingly against the perforated strip engaging the thread-holding arrangement or more accurately the plate I4 so as to prevent any undesired shifting of said strip.

Figs. 2, a, 5, 6 illustrate diagrammatically the operation of the arrangement. Fig. 2 that is a view from above, corresponds to the moment at which the warp threads 2| are carried along by the comb la over the perforated strip l3 lying on the carrier plate l4. Said threads are fed through any suitable means that are not illustrated. The threads are guided and suitably distributed through the perforations 22 provided in the transversal guiding rail 23 and between the teeth of the cross member 24 lying in parallelism with and at a short distance from said guiding rail 23. The short guiding distance thus provided between the

members

23 and 24 ensures the proper engagement of the hooks of the clamping comb with said threads.

Fig. 4 corresponds to the most important moment of operation, which moment is that at which the two combs lb and I0 forming part of the system of five combs Ia, lb, Ic, Id, is are guided so as to pass together through the perforations in the perforated strip 13 and between the teeth of the plate It so as to take hold of the warp threads 2| stretched as disclosed over said perforated strip by the first comb la. Consequently, the combs lb and is make the threads pass through the perforations in the perforated strip [3 and give them the shape of a loop 25 (Fig. 5) The warp threads are on the other hand previously taken hold of and clamped in register with the cross beam 2 through the two other combs Id and ie.

The thread warp is then out between the two combs idie through the agency of a knife whereby the comb Ie forms and holds again an end. of a thread warp, said comb is holding warp until a further cycle of knotting cperations begins over again with the threads of said warp. The comb Id is now brought as illustrated in Fig. 5 above and into register with the c la g h r w th the ends of the threads I held thereby, whereby the two ends 26 of the thread forming the loop '25 come into superposed relationship "by reason of the combs let-Id resting over one another to the front of the edge of the perforated strip. The combs lb and lo hang thus through their new open hooks inside the loops 25. The rear comb ljc is then raised somewhat and urged obliquely and upwardly through the loops 25 so as to take hold of the ends 26 of the threads that are already clamped by the combs la and lb whereby said rear'com'b to clamps said ends 25. This' being done, it .is possible to release the pressing meme bers of the combs la and lb; theicorhbfilc is, causedto carry the'ends of the threads along with it and causes then to pass inside the loop's '25; At this moment, the front comb ibstillretains the loops through its-open hooks but'it allows; said loops to shrink while yielding in a uniform manner; Before the loops are completely' closed through the operation of the comb to, said comb ibis released. This release is obtained by mov ing said comb lb towards the side corresponding to the backs of the hooks; consequently the loops are easily released while the tips of the hooks H may be removed without being disturbed at any moment during the removal of the comb of which they form part.

The comb Ic serves then for urging into more intimate contact the loops over the perforated strip while fastening the knot that is shown in its first'stage of formation in Fig. 6.

The combs lalblcld are then released and'removed from the threads and may be used for a further operation while the comb ie is returned with its thread warp into the position corresponding to the position of the comb a in Fig. 2 after positioning of a further perforated strip on the plate M.

It is also possibleto lay side by side several combs so as to form comparatively long bars whereby it is an easy matter to perform the simultaneous'knotting ofa number of perforated strips through the same stages of operation and the same movements. v

Figs. 4, 5 and 6 are diagrammatic showings of different locations of the combs corresponding to the different'stages of operation. It is however. possible, within the scope of the invention, to control mechanically said combs so as t-cjobtain an automatic operation of the arrangement.

What I claim is: v

1. In a method for knotting threads on perforated strips in order to produce sample cards, the steps of clamping the threads of a cut warp sheet lying on one side of a perforated strip on" two independent hook carrying combs, the hooks of which extend through the corresponding perforations of a perforatedstrip and-draw ing said threads through said perforations; for forming loops on the further side of the strip, turning the cut ends of the warp threads back so that they lie over the free QlfldS thQT801i,l leasing one of the combs with reference to the threads, urging said comb through the 'loops to engage the ends of the threads remaining on the first side of the strip, and returning the last mentioned comb through the loops to tighten the threads over the edge of the strip, releasing the other comb from the threads and removing both combs away therefrom.

2. In a method for knotting threads on perforated strips in order tdproduce sample cards, the steps of clamping the hooks provided on two independent combs on the threads of a; cut

warp sheet, causing the thread-clamping hooks of both combs to pass through the corresponding perforations of a perforated strip for forming loops on the further side of the strip, releasing the hooks of one comb with reference to the threads while leaving the stems carrying said hooks inside the corresponding loops, turning the cut ends of each thread to extend together over the edge of the strip nearest the perforations therein, urging the above mentioned hook stems through the loops to make the hooks thereon clamp the thread ends and returning the thread end engaging hooks through the loops, tightening the threads through action on last mentioned hooks over the edge of the said strip, and removing the hooks of both combs away from the threads engaged thereby.

3. A method for knotting threads on perforated strips for producing sample cards consisting in holding warp threads by means of three hook-carrying combs, one comb at the free ends of said threads and two combs at two points lying very near one another at distances from said free ends that are substantially equal to the length required for the knotting of the sample threads, laying the threads carried between the first comb and the other combs over a perforated strip, cutting the threads between the last two combs, engaging two further hook carrying combs with their hooks extending through the perforations of the strip from the side of the latter opposed to the threads, turning the cut ends of the threads over the first mentioned free ends thereof to extend together with them over the edge of the strip that is nearest the perforations, clamping the threads on the hooks of both last mentioned combs and drawing back the two last mentioned combs with the thread-carrying hooks through the perforations to form a loop on the side of the strip opposed to the remainder of the threads, releasing the hooks of one of the last mentioned combs and urging the released hooks freely through the loops into engagement with the folded ends of the threads extending over the strip edge, removing the combs carrying the cooperating ends of the threads, drawing back the thread end engaging comb through the loops to tighten the threads inside their loops over the said strip edge, and removing the two combs engaging the loop.

4. A method for knotting threadson perforated strips for producing sample cards consisting in holding warp threads by means of three hook-carrying combs, one comb at the free ends of said threads and two combs at two points lyingvery near'one another at distances from said free ends that are substantially equal to the length required for the knotting of the sample threads, laying the threads carried between the first comb and the other combs over a perforated stripfclutting the threads between the two last combs, engaging two further hook-carrying combs with their hooks extending through the perforations of the strip from the side of the'latter opposed tothe threads, turning the cut ends of the threads over the first mentioned free ends thereof to extend together with them over the edge of the strip that is nearest the perforations, clamping the threads on the hooks of both last mentioned combs and drawing back the two last mentioned combs with the thread-carrying hooks through the perforations to form a loop on the side of the strip opposed to the remainder of the threads releasing the hooks of one of the last mentioned combs and urging the released hooks freely through the loops into engagement with the folded ends of the threads extending over the strip edge, removing the combs carrying the cooperating ends of the first threads, drawing back the thread end engaging comb through the loops to tighten the threads inside their loops over the said strip edge, and removing the further comb remaining in clamping cooperation with the loops, finishing the tightening action of the comb that has engaged the ends of the threads, releasing said comb and urging the third comb into operative position in the place of the first comb to make the end of the remaining thread warp lie over the location of a further perforated strip.

5. In an arrangement for knotting threads over perforated sample cards laid over a support, the provision of at least two combs comprising each a body, a number of parallel hooks including stems rigid with the comb body, each hook being adapted to engage a thread through a perforation of the sample card strip, an equal number of pressure members slidingly carried by the comb body in register with said hooks and adapted to clamp said threads between their heads and said hooks when said pressure mem bers are in their outer operative position, and a. common member operatively connected to the different pressure members and adapted to move in a direction parallel with the hook stems and means controlling the movements of last mentioned member for bringing the pressure members carried thereby into and out of their op erative positions registering with the hooks.

6. In an arrangement for knotting threads over perforated sample cards laid over a support, the provision of at least two combs comprising each a body, a number of parallel hooks including stems rigid with the comb body, each hook being adapted to engage a thread through a perforation of the sample card strip, an equal number of pressure members slidingly carried by the comb body in register with said hooks and adapted to clamp said threads between their a heads and said hooks when said pressure members are in their outer operative position, and a common member operatively connected to the different pressure members and adapted to move in a direction parallel with the hook stems, means for controlling the movements of last mentioned member for bringing the pressure members carried thereby into and out of their operative positions registering with the hooks, springs connecting the inner ends of the pressure members with the corresponding member controlling the latter for yieldingly urging the pressure members towards the hooks and absorbing the reaction produced by the clamping of the threads between the hooks and the pressure members.

7. In an arrangement for knotting threads over perforated sample cards laid over a support, the provision of at least two combs comprising each a body, a number of parallel hooks including stems rigid with the comb body, each hook being adapted to engage a thread through a perforation of the sample card strip, an equal number of pressure members slidingly carried by the comb body in register with said hooks including heads provided with an axial slot the sides of which slidingly engage the cooperating surfaces of the hook stems and are adapted to exert a clamping action on the threads engaged between said sides of the slot and cooperating hooks, a common member operatively connected to the Y 8 different pressure members and adapted to move in a direction parallel with the hook stems and means controlling the movements of last mentioned member for bringing the pressure members carried thereby into and out of their operative positions registering with the hooks.

8. In an arrangment for knotting threads over sample cards including a carrier plate for perforated strips that are to form the sample cards, said carrier plate comprising projecting teeth folded back to form with the remainder of the carrier plate in register with the intervals separating the location of the perforations in said strips a guide for the introduction of the perforated strips and at least two combs comprising each a body, a number of parallel hooks including stems rigid with the comb body, each hook being adapted to engage a thread through a perforation of the sample card strip, an equal number of pressure members slidingly carried by the comb body in register with said hooks and adapted to clamp said threads between their heads and said hooks when said pressure members are in their outer operative position, a common member operatively connected to the different pressure members and adapted to move in a direction parallel with the hook stems and means controlling the movements of last mentioned member for bringing the pressure members carried thereby into and out of their operative positions registering with the hooks.

9. In an arrangement for knotting threads over perforated sample cards laid over .a support, the provision of at least two combs comprising each a body, a number of parallel hooks including stems rigid with the comb body, each hook being adapted to engage a thread through a perforation or the sampie card strip, an equal number of pressure members slidingly carried by the comb body in register with said hooks including heads provided with an axial slot the sides of which slidingly engage the cooperating surfaces of the hook stems and are adapted to exert a clamping action on the threads engaged between said sides of the slot and cooperating hooks, the heads of the pressure members having oblique surfaces for the gradual clamping of the threads between same and the corresponding hooks, a common member operatively connected to the difierent pressure members and adapted to move in a direction parallel with the hook stems and means controlling the movements of last mentioned member for bringing the pressure members carried thereby into and out of their operative positions registering with the hooks.

10. In an arrangement for knotting threads over sample cards including a carrier plate for the perforated strips that are to form the sample cards, said carrier plate comprising projecting teeth folded back to form with the remainder of the carrier plate in register with the intervals separating the location of the perforations in said strips a guide for the introduction of the perforated strips, at least one adjustable stop adapted to be secured to the carrier plate at an adjustable point thereof, a spring blade rigid with said stop for urging the perforated strip into contact with the carrier plate and at least two combs comprising each a body, a number of parallel hooks including stems rigid with the comb body, each hook being adapted to engage a thread through a perforation of the sample card strip, an equal number of pressure mem- 9 10 bers slidingly carried by the comb body in register with said hooks and adapted to clamp said REFERENCES CITED threads between their heads and said hooks when The following references are of record in the said pressunia members are in tlioeir outert opfil f this patent; era ive posit on, a common mem er opera ive- 5 1y connected to the diiferent pressure members UNITED STATES PATENTS and adapted to move in a direction parallel with Number Name Date the hook stems and. means controlling the move- 1,705,860 Hagihara Mar. 19, 1929 ments of last mentioned member for bringing 2,087,572 Gastrich July 20, 1937 the pressure members carried thereby into and 10 2,239,212 'Adams Apr. 22, 1941 1(31111:; 22:11:38.1! operative pos1tions reg1ster1ng with FOREIGN PATENTS Number Country Date ERNST ERB. 789.612 France Nov. 4, 1935