US2347247A - Machine for making incisions in soles - Google Patents

Description

April 1944- t F. E. BERTRAND I 2,347,247

MACHINE FOR MAKING INGISIONS IN SOLES 2 Sheets-Sheet l Fig. 5;

Fig.4. 0 250 Original Filed July 26, 1940 Fig T April 25, 1944. BERTRAND 2,347,247

MACHINE FOR MAKING INCISIONS IN SOLES Original Filed July 26, 1940 Z Sheets-Shet 2 Patented Apr. 25, 1944 333T AVAHQl- LB. E COPY MACHINE FOR MAKING INCISIONS IN SOLES Frederic E. Bertrand, Lynn, Mass, assignor to United Shoe Machinery Corporation, Flemington, N. J., a corporation ofNew Jersey Original application July 26, 1940, Serial No. 347,708. Divided and this application March 9, 1942, Serial No. 433,893

5 Claims.

This invention relates to machines for making incisions in soles and is herein histrated and described as embodied in a, knife a rangement for performing this operation. In the manufacture of a certain type of insole which will be described later it is desirable to make not only the usual pair of scoring cuts which extend partially through the thickness of the sole material but also to make cuts which extend through the entire thickness of the sole to remove pieces therefrom. The knife arrangement disclosed herein for making such incisions may conveniently be used in the machine, disclosed in United States Letters Patent No. 2,302,738, granted November 24, 1942, upon an application of which the present application is a division.

It is an object of the present invention to provide a knife arrangement capable of performing operations ofthe character above described. In accordance with a feature of the invention, the illustrated device consists of a pair of incising The knife arrangement disclosed herein for makward a sole supporting surface and having their blade portions in sliding engagement with each other, one of the knives being positively connected to the head to enable it to be forced through the entire thickness of the sole and the other knife being yieldably connected: to the head to enable it to stop when it has cut partiallythrough the thickness ofthe sole. 'As shown herein the yieldably connected knife has a single straight edge and is used to make an ordinary scoring cut and the positively connected knife is L-shaped and serves to remove atriangularshaped piece of material from the rounded sole blank.

With the above and other features and objects in view, the invention will now be described in connection with the accompanyingdrawings and will be pointed out in the claims.

In the drawings, Fig. 1 is a plan view of the flesh surface of a so-called Uni-channel insole after havng been operated upon by the knife arrangement which constitutes the subject matter of this invention;

Fig. 2 is an edge view of the sole shown in Fig. 1;

Fig. 3 is a side elevation partly in section showing the knife arrangement for performing the operation indicated in Fig. 1;

Fig. 4 is a section taken on v the line IV-IV of Fig. 3 showing the left-hand knife assembly;

Fig. 4 is a, section taken on the line Iv -{V of Fig. 3 showing the right-hand knife assembly;

Fig. 5 is a bottom plan view of the knife arrangement shown in Figs. 3 and 4; and

Fig. 6 is a side elevation of a machine provided with the improved knife arrangement.

To facilitate an understanding of the construction and arrangement of the illustrated device reference will first be made to the kind of work for which it is adapted. It may be used, for example, to, perform operations on insoles of the so-called Uni-channel type disclosed in United States Letters Patent No. 2,146,814 granted February 4, 1939, upon the application of James P. Fredericksen. The heel end of, such an insole S is shown in Figs. 1 and 2. This insole is prepared by first rounding a sole blank to a shape having a heel portion of normal outline and a forepart extending beyond the normal outline. The normal outline is indicated by the line 454 and the outline of the extended forepart by the line 459, the latter outline merging into the former along inclined lines 460 extending rearwardly from ap-- proximately the heel-breast line. Ordinarily the insole is then channeled by forming a slit extending inwardly from the edge around the extended forepart, the depth of this slit beingindi-- cated by the line 458. The feather of the insole, istrimmed to the normal outlinev 454, leaving an extendinglip 456 which, is later folded back upon itself to form an upstanding rib. When the. lip. is thus folded the outer edge of the lip will coincide substantially with the normal outline of the insole. The. trimming of the feather may be performed simultaneously with the channeling operation. It will be observed that a lip thus formed, and consequently therib formed by folding thelip back upon itself, will not terminate squarely in the vicinity of theheel-breast line.

The illustrated knife arrangement presently to be described may be used for the purpose of incising these Uni-channel insoles in such a manher as to cause theribs to terminate squarely. The-operation is performed before the channeling of the sole and the trimming of the feather, and consists, in part, in making a pair of transverse straight cuts- 256 and 298 similar to the scoring cuts usually made to define the terminations of the channellips of the ordinary double lipped insole. The cuts 296 and 298 are made equal tothe thickness of the lip-to be formed. The operation consists also in cutting through the entire thickness of the sole to remove the triangular pieces.

having the inclined edges 460.

For making the transverse, straight cuts 293 and 298 at the respective edges of the Uni-channel insole, the illustrated device is provided with a pair of straight edged knives 462. The arrangements for mounting the knives 462 are shown in Figs. 3 and 4 Only the right-hand knife 462 and its carrier blocks appear in front elevation, being shown in Fig. 4 the showing of the corresponding lefthand members having been omitted in Fig. 4 in order to avoid obscuring other parts to be described later.

Each knife 462 has a shank portion which is slidable for heightwise adjustment in a vertical dovetail guideway formed in a block 566 having an under surface 56I (Fig. 4*) for bearing upon the sole to gage the depth of the cut. The block 566 is split vertically along the guideway and is provided with a clamping screw 562 which urges the two sections of the block together to hold the knife 462 in its adjusted position. The block 566 is provided with a dovetail for sliding engagement with a guideway formed in a block 564 and extending forwardly and rearwardly of the machine. The block 564 is split along its guideway and is provided with a clamping screw 566 for holding the block 566 in adjusted position. The block 564 is provided with a dovetail for sliding engagement With a transverse guideway formed in a split block 566. A clamping screw 5"] urges the two sections of the block 566 together to clamp the block 564 inadjusted position. Extending upwardly from the block 568 is a stem 5 I 2.

' The stem 512 is slidably received within a bore 3 l 6 formed in a cylindrical swivel block 248 which is freely rotatable in a cylindrical bearing 246. Housed within the bore M6 and interposed between the inner end of the bore and the upper end of the stem 5l2 is a compression spring 3|8 which urges the stem 5l2 downwardly. Such downward movement of the stem 5 l 2 is limited by the engagement of a screw 326 extending radially from the stem 512 and engageable with the lower end of a slot 322 formed in the swivel block 248 end of a slot 322 formed in the swivel block 248. The screw 326 also engages the sides of the slot 322 to prevent relative rotation of the stem 5l2 within the bore 3l6. A pin 263 secured in the bearing 246 is positioned between two spaced lugs 265 on the swivel block 246 to prevent excessive free rotation of the swivel block, leaving the swivel block free, however, to rotate to an extent required by gages later to be described.

Each of the knives 462 is carried by its own swivel block 246. The connections between each knife and its swivel block are similar, the two knives and their carriers being symmetrically arranged in respect to a common center line.

For cutting off the triangular pieces having the inclined edges 466, there are provided a pair of knives 464 associated with the respective knives 462 and having L-shaped cutting edges. Each knife 464 has one of the branches of the L of its cutting edge substantially in line with the edge of its associated knife 462 with the adjacent blade portions of the associated knives in relative sliding contact with each other. The rearwardly extending branch of the L must register with the normal edge of the sole, and this is accomplished by an arrangement, which will be referred to later, for gaging and aligning the knives with relation to the edges of the sole. In order more clearly to show the mounting arrangements for the knives 464, the lower portion of the lefthand swivel block 248 is shown in Fig. 4 as it would appear in a section taken rearwardly of the stem 5l2. The left-hand knife 464 and its carrier blocks are thus left unobscured by the left-hand knife 462 and its carrier blocks. Each knife 464 has a shank portion 465 extending upwardly from the branch of the L which is in line with the edge of the knife 462. This shank constitutes a dovetail slide to provide for heightwise adjustment in a vertical guideway formed in a block 466. Such adjustment is facilitated by a screw 468 threaded into the block 466 and having a downwardly extending head against which the blunt upper edge of the other branch of the L is urged into contact in making the adjustment. The screw 468 serves also to transmit a thrust directly to the cutting edge beneath it. The block 466 is partially split in the usualway and the two sections of the block are urged together by a clamping screw 416 to hold the slide in adjusted position. The block 466 is provided with a dovetail 412 which engages a horizontal guideway extending forwardly and rearwardly of the machine and formed in the under surface of a block 414. The block 466 may be secured in any: desired position of adjustment in the block 414,, which is split along. its guideway, by means of a clamping screw 476 which urges together the two sections of the block 414. A dovetail extending from the block 414 slidably engages a transverse guideway formed in a block 418 which is rigidly secured to the under surface of the plate-like extension 258, 266 of the left-hand swivel block 248. The block 478 is split along its guideway and is provided with a clampingscrew 486 for; binding the two sections of the block against the dovetail to hold the block 414 in an adjusted position. It will be understood that each knife 464 is connected to its associated swivel block 248 in the same way and that the various connecting elements above described in the singular are provided in duplicate for the representative knives, the rightand left-hand units being symmetrical with respect to the same center line about which the rightand left-hand knives 462 also are symmetrical.

The adjustment of the blocks 466 and 566 forwardly and rearwardly of the machine should be such as to bring the adjacent blade faces of their respective knives into sliding contact as above described. The fore-and-rear adjustment, and also the lateral adjustment, of each L-knife should be such as to bring the vertex of the L in line with the axis of its swivel block 248. A work table 56, upon which the sole rests, is provided with a brass insert 482 against which the knife 464 strikes in completing its cutting stroke. It is evident that with this arrangement of knives the knife 462 which is backed yieldingly by the spring 3|8 Will cut as deeply as permitted by the gaging surface 56! of the block 566. The knife 462 should be adjusted heightwise in the block 566 to bring its cutting edge just low enough to cut through the thickness of the lip 456 subsequently to be formed without cutting further into the body portion of the sole. The knife 464, however, being positively connected to the head 64 so far as downward movement is-concerned will partake of the full downward movement and should accordingly be adjusted heightwise in the block 466 to bring its cutting edge into engagement with the brass insert 482 when the head 64 occupies its lowermost position. The insert 482 may carry a pair of dies M8 for producing, under pressure of the gaging surfaces 56L a pair of lines of indentations 4|9 extending laterally on the grain surface of the sole to indicate the positions where the channel lip terminates on.

ing and alining th knife assemblies with relation to the sole S the left-hand swivel block 248 is provided with a forward gage 52 and a rear gage 54, while the right-hand swivel block 248 is provided with a forward gage 55 and a rear gage 58. The forward gage 52 is carried by a forward portion 260 of a plate-like member which is integral with the swivel block 248, while the rear gage 54 is carried by a rearwardly extending portion 258 of the same plate-like.

member. Each gage consists of a cylindrical barrel 218 which slidably retains a downwardly spring-pressed work engaging member 284 (Fig. 3). The lower ends of the work engaging members 284 slide along the surface of the work table 50. The gages 56 and 58 of the right-hand swivel block 248 are similar to the gages 52 and 54 and are similarly secured to their swivel block. It is evident that each pair of gages when urged into contact with the edge of the sole S will position its knife assembly laterally in proper relation to the sole because of the fact that the slide 200 which carries the swivel block is free to move transversely in its guideway. It is also evident that the two gages serve to aline their knife assembly in relation to the edge of the sole because of the fact that the swivel block is free to turn in its bearing 246. A mechanism having arms 262 for moving the gages of each knife assembly into gaging relation with the sole S to position the sole and also to gage the knife assemblies is disclosed and claimed in the above-mentioned Letters Patent, No. 2,302,738.

The sole, after having been positioned by the gages, may be clamped upon the work table 50 by a presser 444 (Fig. 5) carried by the head 64. An indenting tool 451 (Fig. 5) is secured upon the presser 444 by a screw 445 and serves to mark a line of indentations 453 (Fig. l) on the flesh surface of the sole to indicate the position of the heel-breast line. The presser also cooperates with suitable dies set into the work table 50 to impress size marks upon the grain surface of the sole.

A mechanism for urging the head 64 downwardly to cause the knives and the presser 444 to perform their operations is disclosed and claimed in the above-mentioned Letters Patent, No. 2,302,- 738. As shown in Fig. 6, this mechanism comprises a toggle link 18 pivotally connected at its lower end by a pin to the head 64 and pivotally connected at its upper end by a pin 88 to the lower end of a toggle link 82. The upper end of the link 82 is pivotally mounted upon a pin 84. This toggle mechanism is operated by a link 88 pivotally mounted at its right-hand end upon the pin 8!! and pivotally connected at its left-hand end to a bell crank 9&1 fulcrumed upon a stationary pin 92. An arm of the bell crank carries a cam roll 94 which engages a groove 96 in a rotary cam 98 mounted on a shaft I08. Rotation of the shaft lllfl may be effected through any suitable clutch mechanism from any desired source of power. The head 64 is guided for up and down movement in suitable ways (not shown) in the frame of the machine. It is evident that movement of the link 88 to the leftwill tend to straighten the toggle, thereby urging the head 64 downwardly to cause the knives to perform their cutting stroke. a

' Having described my invention, what I claim as new and desire to secure by Letters Patent of the United States is:

1. In a machine for incising: insoles, a work table having a sole-supporting surface, a head movable toward said sole-supporting surface, a pair of knives on said head having their edges disposed to cut into an insole on the work table upon movement of the head toward the solesupporting surface, said knives having blade portions in sliding engagement with each other, a positive connection between the head and one of said knives, and a connection between the head and the other knife constructed and arranged to enable that knife to yield as the head urges it into the sole.

2. In a machine for incising insoles, a work table having a sole-supporting surface, a head movable toward said sole-supporting surface, a pair of knives on said head having their edges disposed to cut into an insole on the work table upon movement of the head toward the solesupporting surface, said knives having blade portions in sliding engagement with each other and also having their edges arranged to make a portion of the cut of one knife coincide with a portion of the cut of the other knife, a positive connection between the head and one of said knives, a resilient connection between the head and the other knife, and a gage for stopping said resiliently-connected knife by engagement with the face of the sole to limit the depth of the out made by that knife, the resilient connection thereupon yielding to permit further operative movement of the head.

3. In a machine for incising insoles having a normal heel outline and an extended forepart outline, a work table having a sole-supporting surface, a head movable toward said sole-supporting surface, a knife having an L-shaped cutting edge for cutting off squarely an end of that portion of the sole which extends beyond the normal outline, a knife having a straight edge for making a transverse out extending only part way through the sole material, and means for mounting said knives on said head with the straight edge substantially in line with one of the edges of the L.

4. In a machine for incising insoles having a normal heel outline and an extended forepart outline, a work table'having a sole-supporting surface, a head movable toward said sole-supporting surface, a knife having an L-shaped cutting edge for cutting off squarely an end of that portion of the sole which extends beyond the normal outline, a knife having a straight edge for making a transverse cut extending only part way through the sole material, and means for mounting said knives on said head with the straight edge substantially in line with one of the edges of the L and with the blade portions of the knives substantially in face-to-face contact, said mounting means being constructed and arranged to enable the L-shaped knife to advance more closely to said work-supporting surface than the straight knife.

5. In a machine for incising insoles having a normal heel outline and an extended 'forepart outline, a work table having a sole-supporting that knife from cutting beyond a predetermined depth into the sole material while the head continues the operative movement of the L-shaped knife, said resilient connection yielding to permit said further operative movement, the straight edge being substantially in line with one of the edge portions of the L and the corresponding blade portions of the knives being in sliding face-to-face contact.

FREDERIC E. BERTRAND.

CERTIFICATE OF CORRECTION.

Patent No. 2,5h7,2h7. April 25, 19th.

FREDERIC E. BERTRAND.

It is hereby certified that error appears in the printed specification of the above numbered patent requiring correction as follows: Page 1, first column, lines 22 and 25, for "The knife arrangement disclosed herein for makward" read -knives mounted on ahead which is movable toward"; andthat the said Letters Patent should be read with. this correction therein that the same may conform to the record of the case in the Patent Office.

Signed and sealed this 27th day of June, A. D. 19%.

Leslie Frazer (Seal) Acting Commissioner of Patents.

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