US2183088A - Edge binding - Google Patents

Description

Dec. 12, 1939. 8 J. s. WILLIS 2,183,088

EDGE BINDING Filed March 3, 1934 3 Sheets-Sheet 1 INVENTOR J'YWKW ATTO RN EY! J. S. WILLIS EDGE BINDING Filed March 3, 1934 3 Sheets-Sheet 2 F'y.2 Z Z? .57 6

Z9 .39 3/ 6/ 6d 5, I I 6 -3 30 4 l! 55' u r 47 6 '1 E I 44 BY J Z ATTORNEY:

7 INVENTOR Dec. 12, 1939.

VIII/IA J. S. WILLIS EDGE BINDING Filed March 3, 1934 s Sheets-Sheet s INVENTOR ATTORNEY:

Patented Dec. 12, 1939 UNITED STATES PATENT OFFICE EDGE BINDING John Sherman Willis, Portsmouth, Ohio, assignor, by memo assignments, to Minnesota Mining & Manufacturing Company, St. Paul, Minn., a corporation of Delaware Application March 3, 1934, Serial No. 713,884

4 Claims. (CL 12-55) i This invention relates generally to improvements in the art of binding the edges of sheet materiaLand is of particular importance and of ready application in the shoe manufacturing industry. The improvements are concerned with the method of applying the binding, the attaching means used in the method and the machine for applying the fastening means and the edge of binding.

It has been the practice to finish the edges of certain parts of the shoe, such as the uppers,

' straps, etc., with so-called French cord binding.

In this procedure a ribbon or binding strip is placed flat against'the outer upper margin of the vamp and is stitched to the vamp by a line of stitching closealong the edge of the upper and the adjacent edge of the binding strip. The free portion of the binding strip is lapped over the edge of the vamp or upper, concealing the stitching, and is cemented to the inner side of the vamp or quarter. This overlap or double thickness of ribbon on the outer edge margin of the vamp forms a heading along the edge of the vamp which presents the appearance of a cord binding.

The materials used and the method of applying this binding have never been perfected to the point where the operation has been entirely free of improperly distributed cement and wherein the binding has been securely fastened in position without wrinkles. Heretofore the tape has been applied marginally along the under surface of the binding strip before the binding strip is turned over the edge of the vamp, or the cement has been applied as a coating for a margin of the binding strip and covered with a removable strip, or else a protective striphas been used inserted, between the binding strip and the vamp outer margin and extending beyond the binding for protecting the outer face of the vamp from wet adhesive applied to the strip prior to overlapping thereof.

2 It is the object of the present invention to provide an improved fastening means for the edge binding strip which is supplied as a tape adhesively coated on both sides. This tape may be furnished in rolls for application to the vamp through machinery at the time of the overlapping of the binding strip and formation of the French cord binding.

It is another object-of this invention to provide an improved method of applying edge binding to sheet material such as shoe uppers or straps,

the same machinery and at the same time that the binding strip, is turned over and secured in position.

It is a further object of this invention to provide an improved machine for applying the tape of this 5 invention and for performing the steps of this invention, which machine accurately lays the tape against the inner edge margin of the vamp, presses it firmly into adhesively fastened position, turns the binding strip, which has been stitched in 10 position, over the edge of'the'v amp and against the adhesively coatedupper surface of the fastening tape, and exerts lateral force on the binding strip for tautly drawing the same over the edge, whereby a neat uniform edge finish is provided 15 without wrinkles, which inechanism also incorporates an intermittent feed for automatically progressing the vamp for progressively binding the entire edge thereof. 7

Other objects and further advantages will be 20 more fully apparent from a description of the accompanying drawings, in which:

Figure 1 is a side elevation ofthe machine for applying the adhesive tape and edge binding to the shoe upper.

Figure 2 is a vertical central sectional view taken lengthwise of the machine and illustrating the working parts thereof.

Figure 3 is an end view partially fragmentary and partially sectional, illustrating the swinging anvil in the first phase of movement, and the presser foot, carrying the tape feeding means, in retraction stroke. t

Figure 4 is a view taken similar to Figure 3, showing the swinging anvil in forward feed posi- 35 tion and about to return, the presser foot descending for engagement when the. anvil is fully retracted.

Figure 5' is a view taken similar to Figure 3, but illustrating the claws of the swinging anvil coming into engagement with the work, with the anvil at starting-position of feed.

Figure 6 is a sectional view taken on line 6-6, Figure 2, illustrating the cam device for :the swinging anvil.

Figure 7 is a sectional view taken online 1- Figure 1, further illustrating the swinging anvil.

Figure 8 is a view taken on line 88, Figure 1.

Figure 9 is a perspective view illustrating the 50 movements of the machine at the working point.

Figure 10. is a fragmentary side view of the machine at the presser foot, showing the work in section and illustrating the edge binding strip as it is being folded into position.

Figure 11 is a sectional view showing the claw of the anvil in the first phase of its movement.

Figure 12 is a view taken similar to Figure 11, showing the claw in the fully effective and final phase of its movement.

Figure 13 is a fragmentary plan view of the horn, showing the work in position and the guide or binding strip directing element of the horn in operation.

Figure 14 is a perspective view of an upper with its edge finished.

Figure 15 is a perspective view of the adhesive strip of this invention.

Figure 16 is a cross sectional view of an edge of the work. prior to the operation of folding the edge binding over the edge of the vamp.

.Figure 17 is a sectional view taken similar to Figure 16, but showing the finished work.

Figure 18 is a view taken similar to Figures 3 to 5, but partly in section through the lifting finger for raising the presser foot.

The fastening tape of this invention is indicated at H] (see Figure 15). This tape is adhesively coated on both sides.

As shown in Figure 16, the upper or vamp II has the edge binding strip l2 stitched thereto along the upper margin. This strip is of considerable width and is stitched close to its upper. edge as at l3 so that it can be turned over the edge of the vamp in the process of binding the vamp edge. The tape 10 for attaching this binding strip is applied along the inner margin of the vamp (see Figure 16), and the binding strip is turned up and over the edge of the vamp and down against the inner face of the attaching strip (see Figure 1'7). The line of stitching securely fastens a portion of the binding strip along the outer margin of the upper and when the strip has been turned over, as described, a double thickness or overlap. providing a thickened edge, results. This suitably embellishes the vamp or upper and effectively binds the edge thereof.

In the method of binding the upper edge of the vamp, the adhesively coated tape 10 is fed to the inner upper edge margin of the vamp just prior to the rolling over or turning of the binding strip, and as the binding strip is turned over and lapped against the inner face of the adhesively coated strip, sufficient lateral force is placed thereon for drawing the strip tautly around the edge and sufficient face pressure is applied for securely fixing it against the adhesive coated inner face of the tape.

Through this method, the edge of the vamp is neatly bound. The adhesive coating is carried on both sides of the tape and is not applied to the vamp or edge binding ribbon or strip. This prevents improper and uneven application of the adhesive.

Generally described, in the mechanism disclosed for carrying out the method, the adhesive tape I0 is fed from a spool (not shown) through a guide l5 mounted on a presser foot l6 and is engaged by means of the presser foot l6 against the inner marginal face of the vamp II. The machine incorporates a guide 11 for turning and positioning the binding strip 12 as the vamp edge is moved past the presser foot.

Feeding of the vamp is accomplished by means of an anvil and claw mechanism l8which stretches the binding strip over the edge of the vamp and engages it smoothly against the inner surface of the adhesive tape, and in the final phase of its movement grips the vamp edge and advances the upper beneath the mechanism in successive feeding impulses.

Referring to the drawings, it will be seen that the adhesive coated strip 10 of this invention is automatically fed to the upper or vamp and the binding strip turned down over the same by means of a machine somewhat similar to a sewing machine but not employing any sort of stitching or sewing mechanism. The machine, as disclosed, incorporates a frame or casing structure 20 providing a work receiving throat 2|. The extended portions of the frame structure in the case of the upper may be referred to as the head 22, and the lower as the table 23.

A power shaft 24 is mounted horizontally in the head portion. The rear external end of this shaft carries a rotating means 25 including a hand wheel 26 and a pulley 21 engaged by a belt 28.

The forward end of the power shaft within the head incorporates a crank arm or eccentric 29. Adjacent this crank arm or eccentric the shaft is supported in a lug 30 of the frame. The crank arm has its outer end connected to an arm of a bell crank lever 3|, by meansof a link 32.

The other arm of the bell crank lever is fiexibly connected to the upper end of the vertically reciprocable swinging anvil and claw device 18 by means of a second link 33. This device I8 mounted on a vertically disposed slide rod 34 is journalled in vertically spaced lugs 35 of the swinging anvil [8. The swinging anvil is of U-shape, its throat registering with the throat of the machine. The anvil is fulcrumed on both arms, on aligned pivots. The upper pivot comprises a stud 36 screwed into the frame in vertical position and incorporating a head for supporting the anvil. The lower arm of the anvil incorporates an upright tapered stud 31 fitting upwardly into a tapered hole of the journal plate 38 fixed in the table.

The actuating connection for the swinging anvil, as shown in Figures -2 and 6, consists of an eccentric 39 on the power shaft, the eccentric disposed in a crank arm 40 and the crank arm slidably mounted on a pin 4| extended vertically upwardly from the extreme rear end of the anvil.

Through this eccentric movement, the anvil is swung or oscillated at its forward end. The lower arm of the ,anvil carries a contact plate" at its outer end mounted on an attaching element 43 which is extended from the arm of the swinging anvil. The upper surface of this plate 42 is flush with the surface of the table 23. The contact plate of the anvil is disposed in a slot 44 formed transversely of the table and lengthwise of the path of movement of the vamp as it is fed across the table.

A gripping arm 45 is mounted on the anvil being pivoted to the attaching element 43. This arm is curved, having its lower inner end pivoted on a pin 46 fixed transversely of a slot in the attaching block, and its upper end disposed substantially horizontally above the contact block. The under side of the arm adjacent the plate 42 is serrated forming a claw.

An auxiliary element or smoothing finger or claw 41 is pivotally engaged on a pin 48 fixed in the side of the main arm and has an engaging surface which is also serrated for contact with the edge binding strip or ribbon. Normally this smoothing finger 41 is held in position for contact in advance of the serrated end surface of the arm, this being done by means of a spring 49 coiled about the pivot pin 48 and having one lend engaged in a lug 58 of the arm and the other end engaging the top of the finger. Downward, movement of this claw is limited by means of a pin fixed in the arm.

As shown in Figures 11 and '12, this finger 41 engages the binding strip in turned over position prior to engagement by the arm and as downward movement of the arm progresses through mechanism hereinafter described, the finger swings on its pivot and ultimately full contact of the arm is made.- The edge of the vamp with the binding strip turned over and firmly fixed in position on the adhesive coated strip is thenfirmly gripped between the contact plate 42 of the anvil and the gripping device as represented by the finger or claw 41, arm 45 and contact plate 42. At this time the eccentric acts to, swing'the anvil and a feeding impulse results moving the vamp in a forward direction a predetermined distance.

The edge binding strip or ribbon I2 is initially positioned by means of the guide H (see Figure 13) fixed on the table, so that as the vamp edge passes between the elements of the gripping device it is lapped toward position for attachment.

The tape 8 is fed to the vamp through the guide channel I5 which is pivotally supported on a stud 52 journalled in the lower end of the presser foot It. A lever 53 is screwed on the end of the pivot stud against the side of the presser foot for manipulating the guide channel during initial tape starting operations for feeding the tape beneath the presser foot and onto the inner margin of the vamp.

The presser foot also carries a yieldable guide 54 which is in the form of a spring steel strip fastened at its upper end against the side of the presser foot and extending below the presser foot where it forms a yieldable abutment engaged by the edge of the vamp inserted beneath the presser foot.

The presser foot element is adjustably fixed, by I means of a set screw 55, on the end of a vertically reciprocably mounted rod 55 joumalled in lugs 51, 51, of the machine frame. The upper end of the rod 55 is slidably telescopically supported in a bushing 58 which is screw-threaded into the upper lug 51. The rod 56 has a lug 59 fastened to it intermediate of the lugs 51, 58. This lug 59 forms the pivotal support for the bell crank lever 3|. The pivot stub shaft 68 supporting the lever 3| is screwed into the lug. A coil spring 6| under compression is mounted between the lug 59 and the bushing 58.

A presser foot lifting lever 18 is provided (see Figure 18). This lever is pivoted in the head 22 of the machine through a slot 1|. A lug 12 extends from the pivoted portion of the lever and provides an abutment surface 13 adapted to engage the under side of the lug 59 when the lever 18 is swung upwardly as shown in Figure 18. Normally the coil spring 6| acting against .hesive of any sort is applied to the upper,

connection to the link 33, thereby raising th lug 59 and rod 56. The spring 6| is compressed at this time and acts to lower the presser foot when the bell crank lever is swung in a reverse direction. Presser foot lifting movement takes place during the time when the anvil is being actuated to feed the vamp in order that the presser foot will not interfere with the feed.

The arm 45 of the gripping mechanism on the anvil is raised and lowered by swinging movement of the bell crank lever 3| on its pivot 68 with the lug 59 stationary as maintained by spring urged contact of the presser 'foot with the table. Raising and lowering movement of the presser foot occurs when downward movement of the arm 45 is definitely stopped by abutment with the table and the bell crank lever rocks on the outer end of -its lower arm.

The operation of the machine in performing the method of applying the edge binding is as follows: The' vamp or upper as presented to the machine has the edge binding or ribbon strip stitched thereto as shown in Figure 16. No ad- The vamp margin, as shown in Figure 10, is inserted beneath the presser foot against the yieldable guide 54. The loose end of the binding strip is slipped under the yieldable guide and upwardly between the yieldable guide and the guide l1, the guide I1 directing the strip around the edge of the upper in the initial phase of overlapping the same.

The adhesively coated tape I8 is fed through the guide I5, passes under the presser foot, and is attached to the vamp margin longitudinally I thereof. The presser foot acts to press the adhesive coated under surface of the tape firmly against the vamp, prior to engagement of the binding strip on the tape.

The swinging anvil mechanism including the stretching arm and finger or claw is active on the binding strip or ribbon as it is directed or turned over by the guide l1. As shown in Figure 11, the finger or claw initially engages the strip and is active transversely thereof and across the vamp' edge for stretching the ribbon tautly over the edge. As the arm is brought into full contact with the strip, the vamp edge with the edge binding rigidly fixed in place is firmly gripped between the contact plate and the arm of the anvil mechanism. At this time the eccentric 39 is effective for swinging the anvil and the vamp is fed the length of the slot in which the contact plate moves. As has been described, the presser foot is elevated when the gripping arm comes into full contact so that as the anvil is swung the presser foot pressure is relieved.

The strip l8 carries all the adhesive necessary for the operation of fastening the binding strip since the adhesive is on both sides thereof. Application of adhesive is thus confined to the strip and it is fed into the machine in commercial form, it being unnecessary to apply cement or adhesive of any sortan'd a tedious and untidy operation is eliminated.

Since the edge binding is stitched close to its upper edge, the overlapping on the inner side of the vamp producesa double thickness along the outer edge of the vamp and the result is an artistic beading or French cord binding.

Having described my invention, I claim:

1. In an edge binding machine, a table, a swinging anvil, claw mechanism comprising gripping elements on the anvil, a presser foot, a tape feeding guide for delivering tape under the presser foot and against the upper mar nal edge of sheet material inserted under the presser foot, and a guide on the table for directing an edge binding strip secured on the under face of the sheet material into position of overlap on top of the tape, said anvil and claw mechanism cooperating to press the binding strip against the tape and feed the sheet material, and means for elevating said presser foot when said anvil and claw mechanism come into full contact.

2. In a machine of the class described for securing a binding strip over the edge and along the margin of sheet material, a table for supporting the sheet material, a tape feeding mechanism disposed over the edge of the sheet material and adapted to lay the tape along the upper edge margin of the sheet material, a swinging anvil moving parallel to the edge of the sheet material for feeding the same, a gripping arm on said anvil for gripping the edge of the sheet material, and a smoothing claw engaging the binding strip, whereby the binding strip is engaged upon the tape.

3. In a machine of the class described, a table for marginally supporting sheet material, an anvil mounted in the table, a gripping arm carried by the anvil, and operating means therefor extended over the anvil, whereby the edge of the sheet material may be inserted on the table between the anvil and the arm, means for imparting reciprocating motion to said anvil for intermittently feeding and progressing the sheet material, a presser foot vertically reciprocably mounted for engaging the margin of the sheet material, means for reciprocating said presser foot, and means, located above the anvil, for feeding tape onto the margin of said sheet material.

4. In a machine of the class described, a table for marginally supporting sheet material, an anvil mounted in the table, a gripping arm carried by the anvil, means for operating said gripping arm and directing the same downwardly and laterally towards the table, means for imparting reciprocating movement to said anvil for intermittently feeding and progressing the sheet material, and a presser foot for engaging the margin of said sheet, and means for reciprocating said presser foot to alternately release the sheet material and hold the sheet material during the released movement of the gripping arm.

JOHN SHERMAN WILLIS.

Images