US1468629A - Trimming machine - Google Patents

Description

I Sept 25,1923. mfimw.

E. ERICKSON TRIMMING MACHINE Filed June 21 i919 Patented Sept. 25, 1923. v

UNITED STATES titans PATENT orrics.

EDWARD ERICK SON, OF BEVERLY, MASSACHUSETTSJASSIGNOB TO UNI'fED SHOE MA- CHINERY CORPORATION, OF PATERSON, NEW JERSEY, A CORPORATION OF NEW JERSEY.

ranvnvrrive MACHINE.

Application filed June 21, 1919. Serial No. 305,731.

To all whom it may concern:

Be it known that I, EDWAR ERICKSQN, a citizen of the United States, residing at Beverly, in the county of Essex and tate of Massachusetts, have invented certain-Improvements in Trimming Machines, of which the following description, in connection with the accompanying drawings, is a specification, like reference characterson the drawings indicating like parts in the several figures. 3

This invention relates to trimming machines and more especially to those adapted to operate on bootsan'd shoes. p

In the manufactureof boots and shoes that would beseriously damaged bybeing soiled or discolored, the uppers are, in some cases, covered by protectors made of some relatively thin sheet material such as cloth or paper. NVhen such protecting covers are a used they are applied to the uppers before the shoes undergo lasting and remain on the shoes until the latter are otherwise completed and ready to be packed. Incidentally to attaching the margin of the upper to the sole the protecting cover is caught by the stitches or other fasteners, so that considerable difficulty ensuesin connection with the removal of the" cover. Heretofore it has been the practice to remove thevisible part of-the cover first slashing the latter from top to bottom at the toe and heel, turning down the sections divided by slashing, and finally by drawing a scoring knife manually along that portion of the cover that lies on the sole-extension. This manual scoring operation is not entirely satisfactory, partly because the scoring knife sometimes injures the shoe, partly because it is difiicult ifnot impossible to trim the. cover closely enough to the creaseformed by the upper andithe sole-extensiomand partly because it requires considerable time and skill on the part of the operatives. So far as lam aware no machine for performing this operationhas ever beensuccessful although some attempts have been madetofprovide a satisfactory machine for thefpu'rpose. 7 v

In viewof the aforesaid problem and dif ficulties the principal object of the present invention is to provide a satisfactory ma chine for scoring or severing a shoe cover.

In accordance with this object a feature o t e v n i n ons ts in a sh ne hev' motion;

ing a scoring knife constructed, arranged and operated so as to score or sever a shoe cover in the crease formed by the upper and the sole-extension, without liability of inuring the shoe or of leaving any remnant of the cover pro ectmg from the crease far enough to be observed.

i to engage the work intermittently and preferably by striking a series of percussional impacts to penetrate the work without appreciably vibrating the latter. The invention also preferably includes a guard against which the shoe may be held and relatively to which it may be fed by the hands-of the operative. The guard, moreover, as shown, is arranged tooverhang the knife and to lie between the knife and the shoe-upper so as to bear on the latter. The tip of the guard bears on that part of the shoe-cover that lies on the upper surface of the sole so as to limit the penetration of the knife.

Another feature of the invention consists in novel means for imparting operating motion to the knife. According to the form illustrated the knife is moved to penetrate the work and is otherwise moved, while pencrating, to execute a drawing cut, the operating edge therefore having a compound The scoring or cutting edge of the knife, according to this embodiment of the invention, is caused to describe an endless curved path through the greater portion of which it-is clear of the work and behind the guard. Because of the thinness of shoecovers the knife is preferably so operated, and the knife and guard are preferably so related, that the extent of drawing cut in each cycle will be considerably greater than the depth of penetration. Accordingly, the invention, as shown, is embodied in a machine that fulfills these conditions. Tlhe construction of the operating parts .is such that they may operate at very high speed, and although the knife does not engage the work continuously the latter may be fed continuouslyia nd rapidly without interrupting the continuityof the scoring out, and

without departing from the crease even wherethe latter curves sharply as-at the endsan'd at the ball portion of the shoe.

Since, in trimming along the sharply curved portions. ample clearance between the knife and the work is desirable, and since V nism that will'insure the desired margin of clearance with a minimum degree of vibra' tion. Accordingly, these considerations are taken into account in the illustrated form of the inventionin which the knife is caused to execute an elliptic motion of which the ma jor component includes penetration and learance while the minor component causes the drawing cut. Moreover, as shown, the operating mechanism causes the drawing action to be effective so long'as the knife is in contact with the work, and consequently it becomes effective simultaneously with the beginning of each penetration. 7

These and other features of the invention are illustrated by the accompanying" drawings and are hereinafter described in detail and claimed.

Referring to the drawings,

Fig. 1 represents a side elevation, partly broken away, of a machine embodying the present invention, the upper portion of the head being shown in vertical section;

, Fig. 2 represents a cross-section through the structure intersected by line 2--2 of Fig. 1; .7

Fig, 3' represents a sectional view similar to Fig. 1 but on a larger scale of the scoring knife and the elements adjacent thereto, and includes a portion of a shoe in position to undergo operation;

Fig. 4 represents a section throughthestructure intersected by. line H of Fig. 3; and

" Fig. 5 represents a section through the structure intersected by line 55 of Fig. 3.

7 Fig. 6 represents an elevation of the workengaging portions of the knife and knifeguard.

The machine as shown comprises a base .orstandard 10 and a frame or head 12 affixed thereto. The scoring knife is indicated at l gand it is shown in the present instance as embodying an arcuate form for purposes hereinafter explained.- One end of the knife is beveled to form the scoring or severing edge. The knife. is detaohably and adjustably fastened to a holder or earrierwlti whiehin the present instance has a shank portion 1 8 that constitutes a rockshaft. The

portion indicated at 16. has an internal cylindric groove '20 ofthe same degree of curva-r.

ture'as the knife and the latter is seated there in and clamped by a bolt 22and a clamp ngbar 2 1:. The holder 16 is bored and tapped to receive the shank "ofthebolt and the shank extends loosely through a hole in the bar 24f Thisbar bridges across the concavity of the'lmife. holder and one end is seated upon the knife while the other end 7 is seated in the groove 20 so as to be locked againstvrotation about the axis of, the bolt.

Whenthe bolt is loosened the knife maybe adjusted lengthwise or may he removed for sharpening or replacement.

The shaft portion '18 of the knife-holder extendsthrough a sleeve26 and is retained in the sleeve by the: hub 28 of an arm 30.

through the medium ofa block 36. The

pin 34 as shown is screwed intothe frame of the head 12 and the block 36 is mounted thereonso as to be free to swivel. The

arm 30, as shown by Fig. 2, is forked and is arranged to embrace the block.

The bore of the sleeve 26 is eccentric and the sleeve is rotated about its axis so as to carry thevrock-shaft bodily about said axis. Any suitable means may be provided for rotating the sleeve, the means shown comprising apullev 38 affixed to the upper end of the sleeve, and a belt 40 running from said pulley to a driving pulley 42. For the convenience of the oper'ative'the sleeve 26 and rock-shaft 18. are inclined, and since 7 the shaft let-that carries the driving pulley 42 is horizontal idle pulleys such as that indicated attG are arranged to guide the belt.

'The sleeve 26 bears in a hardened steel bushing 48 and the latter is fixed by any suitable means ina bore in the head. End shake'of the sleeve' is prevented by a shoulder50 at the lower end and by the hub of the pulley at'the' upper end. The head is provided with an oil cup 52 from which oil is, conducted to the sleeve by a v duct 54L that extends through the bushing.

As the sleeve is rotated it carries the rockshaft 18 bodily; in a circular'path the diameter'of which dependsupon the degree of eccentricity between the axis of "the sleeve and that of the rock shaftI The bodily mately midwaybetween the f the eas es there'sult that the lateral movement ofth'e f knife is only one-half as great as the movement toward and from the plane of'the work.

Figure 3 includes a portion of a shoe to which aprotecting cover has been attached.

Theupper of the shoe is indicated at 56 and the sole-extensionfis indicated atj58, The

protecting cover isindicated at 60 and it is shown as having been turned down from Ethe vupper preparatory tobeingsevcred; It is to benoted that the inner marginal portion-of the-coveris held by the stitches that connect the sole to the upper, one of said stitches being indicated tat-62. In practice 7 the 'shoe is presented to the knife in such relation that the scoring edge of the knife will operate. in the crease formed by the upper and the sole-extension, but in order to guide thework relatively to the knife and to guard the workagainst; injury the machine is-pro vided with a guard 64. This guard as shown 18 affixed tothe head-12 by: screws one of which isindicated at 66. The tip :ofthe guard is beveled to a thin edge and is arranged to bear'onthat portion of the cover 60 that lies on the sole-extension. The guard also bears on the upper adjacent to the sole-extension and when the shoe isjundergoingoperation the guard lies between the knife and the shoe-upper. The knife will preferably be adjusted relative toits holder so that its scoring edge willnever project beyond the tip of the guard more than enough to cut through the cover 60, and consequently the knife will be fully out of greater portion of its cycle.

r In, order to enable the knife to trim in the icrease'along the incurve ofthe shank portion of the shoe the outer surface of the guarc is preferably convexed to a degree commensurate with thegreatest degree of concavity to be, encountered in the shank portions of shoes. The shoe may be tipped so' as to have the plane of the sole, more nearly vertical, when necessary, to enable the knife to enterthe less accessible portions of the-crease. A very light pressure of the sole-extension against the tip of the guard is suflicient to insure penetration of the cover f working loose. tural feature permits the upper part of the by the knife because the latter will operate at very high speed and will penetrate by impact before itcan'overcomethe inertia of-the shoe.

The arcuate form of the knife, as shown,

is preferable because it permits the clamping 7. bolt 22 and bar 24 to be located outof the "way ofthe guard and to be of ample proportions to hold the knife without dange Furthermore, this strucguard to diverge away from the shoe without'obstructing the bodily movement of the head 16 of'the knife-holder.

movement claim as new and desire to secure by LettersPatent of the United States is 7 1. A machine of the character described comprising a scoring knife arranged to score the work in the crease formed by the upper and the sole-extension of a shoe, and means arranged to operate the knife so as to cut repeatedly through the cover material lyon the sole-extension. 2. A machine of the character described comprising a bodily movable knife arranged to score the work in the crease formed by the upper and the sole-extension of a shoe, and. meansarranged to operate the knife so asto engage the work intermittently.

21A machine of the character described comprising a-bodily movable knife arranged to score the work in the crease formed by the upper and the sole-extension of a shoe, and means arranged to operate the knife so as to cause the scoring edge to describe an endless path tangential to the upper surface of the sole-extension. 7

l. VA machine of the character described comprising a scoring knife arranged to score the work in the crease formed by the upper and the sole-extension of a shoe, and means arranged to operate the knife so as to cause the scoring edge to engage the work intermittently and to describe an endless path tangential to the sole-extension.

5. A machine ofthe character described comprising a scoring knife, means arranged to coact with the sole-extension of a shoe to guide the latter relatively to the knife, and'means arranged to operate the knife so as to cause a relatively slight penetrating movement and a relatively long drawing cut.

6. A machine of the character described comprising a bodily movable scoring knife, means arranged to guide a piece of work relatively thereto, and means for causing the knife to operate on the work intermittently by executing relatively slight penetration and a relatively long drawing out for each cycle.

7,,A machine of the character described comprising a knife having a cutting edge arranged to operate in the crease formed by the upper and the sole-extension of a shoe, a guard arranged to coact with the sole-extension to locatethe latter relatively to said knife, and means for operating the knife so as to cause a relatively slight penetrating and a relatively long drawing out. 8. A machine of the character described comprising a scoring knife, means for guid- 'ing the work relatively thereto, and means for operating the knife so astocause it to pe netrate the ivork intermittently and to execute a drawing out while penetrating.

9. A machine of the character described comprising a knife having a scoring edge,

means for guiding the Work relatively thereto, and amea ns for operating the knife so as to impart penetrative and other operating 7 movement thereto; V r lOQA machine ofthe character described comprising a scoring knife arranged to score the work in the crease'formed by the upper andthe sole-extension of a shoe, and means arranged to operate the knife so as-to causethe scoring edge to describe an elliptic path tangential to the sole extension.

lli A machine of the character described,

comprising a scoring knife arrangedto score the work in the crease formed by the upper and the sole-extension, a guard arranged to bear on the upper and on the work to be severed, and means arranged to thrustithe knife repeatedly through the Work lying on the sole-extension.

"12. A machine of the character described comprising a scoring knife arranged to score the Workin the crease formed by the upper and the sole-extension, means arranged to operate the knife, and a guard arranged to limit the penetration of the knife.

13. Amachine of the character described comprising a scoring knife arranged to score the Work in the crease formed by the vupperv and the sole-extension, means arranged to thrust theknife repeatedly toward 7 the sole-extension, and a guard arrangedito bear on the upper and on the \vorlclying on the sole-extension so as to locate the latter relatively to the knife. 7

14. A machine of the character described 'comprising'a scoring knife arranged to of the knife to thercreasein the incurved shank portion of the shoe. 7

I 15. A machine of the character-described comprising a, rock-shaft, a scoring knife carried thereby, and means arranged to oscillate the rock-shaft and tomove 1t bochly so as to impart acompound motion to. the knife. V

' 16. A machine of the character described comprising a rockshaft, a scoring knife carried thereby, and means arranged tooscillate the rockshaft about its axis and'to move it bodily about another axis so as to impart a compoundmotion to the knife.

'17. A machine of the character described 7 comprising a rockshaft, a scoring knife carriedthereby, means arrangedto carry the rockshaft bodily about an axis other than its own and to move it synchronously about its own axis so as to impart a compound motion to the knife.

18. A machine of the character, described comprising a rotary driven member having an'eccentric bore, a tool-holder carried by.

rotary member. 7 19. A machine of the character described" said memberand 'having shaft portion ar ranged in said. bore, a tool carried by said tool-holder, and 1 means arranged to hold 7 said tooth-older against turning with said comprising a rotary driven member having an eccentric bore, a rockshaftcar'ried. by

said member and arrangediin said bore, a

tool carried by said rockshaft, an element relatively to which said member is movable, "and means connecting sald element and said rockshaft so as to 1 cause oscillatory motion of the latter in consequence "of rotation of said driven member;

'20. A machine of t'hecharacter described i comprising a rotary sleeve and a bearing structure therefor, the'bore of sand sleeve being eccentric, 1 a rockshaft extending through and bearing in sa d boreya' tool' carried by'said rock'shaft, means for rotating 1 the sleeve, and means arranged to oscillate the rockshaft in consequence. ofthebodily movement imparted to the latter by rotation 7 of the sleeve;

21. A machine-- of the character described comprising arbodily movable knife arranged to operate inthe crease formedby the upper and the sole-extension" of a shoe, a-fixed guard arranged to bear on the materialto be severed from the shoe, and'ineans for operating said knife so as to project the operating edge beyond and to retract it behind said guard; r

; "22; A machine 'of the character described comprising a bodily movable knife arranged V and the sole-extensionof a. shoe, fixed means arranged to co-operate Wlthlthe sole-extension to locate the material to-be'operated on byrthe knife, and means for operatingfthe knife so as to cause the operatingjedge 'to' operate in the crease formed by the upper thereof to strike a series of percussional fim pacts 21 means and the sole-extension;

23. -A machine of the character comprising a movable bladeeholder, an

gainst the material between said fixed edge at one end arranged to operate in the crease formed by the upper :and the soleextension of a shoe,fsaid holder=having aconcave surfaceagainst which the" convex surface of the blade is seated, means co-actmg w th the concave surface of the blade to V clamp the latter to the holder, andmeans' for actuating the blade-holderto operate the blade.

24. A machine of the character described comprising a movable bladediolder, an arcuate knife-blade having operating edge at one endarranged to operate in the extension of a shoe, means forfastening the blade to the holder in such relation that the shank portion of the blade curves awaydescribed arcuate knife-blade having an operating" crease formed by the upper and" the stile v r from the shoe-upper and means for actuating the blade-holder to operate the blade.

25. A machine of the character described comprising an arcuate knife-blade arranged to overhang the sole-extension of a shoe and having an operating edge at one end arranged to operate in the crease formed by the upper and sole-extension, a curved guard formed and arranged to overhang the knife and to bear against the shoe-upper adjacent to said crease, and means for operating the knife, the machine being organized to provide an unobstructed space in which the shoe may be manipulated so as to keep the point of operation in said crease.

26. A machine of the character described comprising a blade-holder having an internal semi-cylindric groove, an arcuate blade arranged in said groove and having an operating edge at one end, a clamping member portions of which are arranged to bear respectively on the concave surface of the blade and on the semi-cylindric surface of said groove behind the rear end of the blade, means arranged to cause said member to clamp the blade to the holder, and means for actuating the holder to operate the blade.

In testimony whereof I have signed my name to this specification.

EDWARD ERICKSON.

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