US1802377A - Stamping machine - Google Patents

Description

April 28, 1931. P. R. GLASS STAMPING MACHINE 2 sheets-sheet 1 l Filed Dec. 2l, 1927 April.28, 1931.

P. R. GLASS STAMPING MACH'NE Filed Dec. 21, 1927 2 sheets-sheet 2 Patented Apr. 28, 1931 srrss U NET@ JERSEY y ns-ners; Assenon'ro UNITED snon Mncr-rrNnaY conronarron, en n conronnrron or ANew sfreierrneiinroirrnn Appncatitnaiea necemterai, 1927. serial No. 241,589.;

rlhis invention .relates to ,stamping"1na chines and is herein illustrated as embodied in a machine for stamping' numbers, names, or the like on shoe soles. i

5" In stamping thevarious desired indicia by impressing a die into the substance of compressible material haring a substantial thiclrness, such as cardboard, leather, and the like, it is essential in order to obtain uniformity in the impressions of the die to talre accountiot the variations in thickness ot the pieces kolf work. rlhus in the machine illustratediin United States Letters Patent ll 1,282,158 granted Oct. 22, 1918 von the application of H. W.' Viinter, the arrangement is suoli that a preliminary adjustment for thickness is ob-y tained by moving the die carrying head into contact with the' piece of work by an iniposif tive, frictionally,operatedcwedge' so as auto matically to bring the die just .into lcontact with the w'orlr regardless ot' its enact thicknessi An impression in the work is then effected by positively actuating a toggle to raise the work support to bring the wor-l; forcibly into stamping contact withy the dies, to the end that the impression shall always -be of the same depth. l An object ot the present invention is .to provide an improved machine of this type ar-i ranged to operate even more eiectively, and designed for the more convenient presenta:` tion of work by the operator so that production of the machine will be increased. To these ends and in accordance with one featureot the invention, the machine is ar-l ranged to loch a slidable'part, which "produces the preliminary measuring movement, so that under all conditions'and especially when pressure is applied to cause op,era tion of Vthe tool, the measuring movement ,will not be disturbed. 1n thev illustrated machine, this locking means takes theV form of coacting surfaces upon the slidable part and the frame ot the machine, so arranged that the apphca--- tion ot-pressure to cause an operationof the tool is eective to loclr the slidable part`,-a nd, hence, the operating member withv which itis associated.

Since it may be assumed that the work to be' stamped upon the machine Ywill nsuallyzbe.

of compressible materiahit follows thatsuc i' cessive lots of work will be found tovary in the opia-lity` of the stock. Variation in the Y 'thickness ot the pieces in successive lots will also betound.v Although the illustrated machine,fby virtue of the preliminary measur-` ing movement referred to, is arranged for automatic compensation for thickness, itis not desirable to put the whole. burden of this work through the'wholefrange of .variation upon the automatic mechanism ofthe4 maf chine, and .another feature.' of the invention resides inimproved means for adjusting the initial position of oneof the members, such as the work support. Still other means are provided tor adju-.stably controlling the depth of impression produced by the machine.l p

Theproduction of a machine of this class depends very largely upon the facility 'with' whichthe successive piecesrot worlrmay be presented to themachine, and when shoe soles are to be stamped,`it is customary for the operator to hold a bunch of soles in this hand spreadout .in fan-like fashion, these soles being presented successively Vto `the machine by a dexterous twist ot the wrist. In: the illustrated `torm of the linvention improved means are provided torffacilitating the presentation of pieces of work between the stamp#` ing die and thework table, in prevent-ing the scarring ofthe work by accidentalcontact. with the stamping dies, and in automatically stripping the work :tromr the 4dies afterithe impression has been made.

In thedrawings, ,Y Fig. l isjaperspective view ofa machine, embodying the present invention'in a` pre` erred forni; i

,lig isa perspective'view of a portion of afshoejisole showing ythe character of work which may bepertormed bythe machine;

llig. 3 is al longitudinal, vertical,section4 through substantially, the rcenter of the ma-f chine-with some parts shown in elevation;

Fig-"Klis a vertical section through the type carrying head from front to back/gp i d,

lige, is a transverse section on the line V-V of Fig'. carrier; and

t through the auxiliary type F ig. 6 is a section on the line VI-VI of Fig. 3.

The operating parts of the illustrated stam ing machine are mounted within a hollow rame l0, having an overlianging portion 12 to provide a recess 14 to allow the introduction of work pieces. As in the machine disclosed in the Letters Patent referred t0 above, a stamping head 16 is supported for vertical reciprocation in the over-hanging ortion 12 of the frame, and a work supportlng table 18 is mounted for up and down movement in a line with and directly beneath said stamping head 16.

The stamping head 16 is detachably secured to the lower end of a forked plunger 20 mounted for vertical reciprocation between the outer face of the overhanging portion 12 and a front cap 22. The plunger 20 is arranged to be moved up and down by means of a Wedge or cam memberl 24, slidably mounted between an upper face of said portion 12 and a detachable top cap 26. This wedge member 24 has an inclined slot 28 which receives a rectangular block 30 pivotally attached by a pin 31 to the forked upper end of the plunger 20, and, as a consequence, movement of the wedge member in ene direction causes the stamping head 16 to descend, this descent of the head being impositively eifected as will be hereinafter exlained, and movement or' the wedge member 1n the other direction, positively raises the plunger and stamping head to facilitate the introduction of work beneath the head. Coactin loekinv surfaces upon the slidable part and t e frame are provided by a beveled upper edge 25 on the wedge member 24 and this edge is received in and coacts with a correspondingly shaped groove 27 in the top cap 26, and normally slides along said groove as the Wedge member moves the die carrying plunger 20 up and down'.VY Ytwillbe seenthat m any of its positions, the stamping head is positively locked against displacement by the application of pressure from beneath both by reason of the angle of the wedge slot 28 with the horizontal and more especially by the Wedging of the beveled edge 25 in the groove 27 so as immediately to increase radi- Cally the friction between the edge 25 and the groove 27 and consequently to lock the wedge member 24 against displacement.

In the stamping head 16, there is provided l a plurality of tvpe carrying wheels 32, each of which is in ividually held against rotation by means of a latch 34, and may be ro-v tated to change its position when released from the latch, by means of a handle (Fig. 1). Reference may be had to United States Letters Patent No. 960,029, granted May 31, 1910 on the application of F. lV. Merrick for a more complete disclosure of the type wheels 32 and the operating parts 34 and 35. In addition, the stamping head 16 is extended at 36 to provide for the attachment of an auxiliary die or type carrier 38 pivotally mounted upon a cross rod 40 and latched in 0pera tive position by means of a spring pressed plunger having an operating head 42. A spring 44 inserted between the extension 36 of the stamping head 16 and the auxiliary carrier 38 depresses the auxiliary carrier to an extent limited by a. stud 46 when the plunger just referred to is retracted by pulling out of the operating head 42. The auxiliary carrier 38 is so arranged that various dies or type pieces may be inserted therein and locked in a groove 48 at one side by an adjustable clamp 50 at the other side. This clamp 50 has a threaded stem 52 for the reception of a clamping screw 54 at the front of the. head. It will be observed that the particular die 56 which is illustrated in the draw ings is not only provided with dove-tailed slots for the reception of type pieces 58 but also has an edge extension having a printing face 60 and an ripper' surface 62 which is received in the notch between two adjacent type pieces upon the numbering wheels 32. The arrangement is such, therefore, that this extension of the type piece 56 not only interlocks with said numbering wheels, but is supported by the wheels at a point directly over the printing face 60. By this arrangement, the various indicia may be positioned ciose to one another upon a sole 64 (Fia. 2), thereby to reduce the amount of space occupied by the whole marking 65. The latter may, for example, be made up of a row of numbers, the factory name (ABC) the name of the last (JOHN DOE), and the union stamp.

W hen an operator inserts a piece of work, such as the sole 64, between the type faces on the stamping head 16 and the work table 18,

he will, CuStGmlbzV .faire Vsilall Y bunch .0LY

solesandwinsertthem one after another from the side of the stamping head 16, bringing each one to a position longitudinally ofthe c machine determined by a gage 66 adjustbly supported in a boss 68, which is provided in the recess 14 of the frame. This insertion of the work is not only facilitated by the positive raising of the plunger 20 carrying the stamping head thereby insuring the maximum possible space between the head and the table, but also by reason of the provision of a guide 70 having a curved side face 72 and an extension linger 74, the lower face of which is substantially flush with the type pieces 58, etc., so that there is no danger of scarring the work as it is inserted beneath the stamping head. The sid-e face 72 coacts with the table to form a work receiving "5* throat. The guide 70 is carried at the lower end of a. rod 76 mounted in lugs 82 on the side of the stamping head and spring pressed to an adjustable operating position by means of a spring 78 surrounding the rod 7 6, which is il" arranged normally to hold the 'guide a-tfthe level of the type facesand allows depression When it is desired todrive the machine an electric motor 184,y such a motor may conveniently be mounted upon'a bracket plate 86 which isl adjustably secured in position inthe franieof the machine by means of atie rod 88, a detachable cover v90 (Figf) for the motor being provided atthe rear-ofthe frame. A.

bearing memher92 ispivotallymountedupon the bracket plate 86 to receive an Oldham coupling 94, one portion of which is secured.

to the motor shaft and the `other portion of which is secured to a worm 96 which is rotatable about a stud 98 clamped in the bracket 86. This worm engages a worm vgear 100 rotatable upon a stub shaft 102 and connected to a pinion 104 whichmesheswith a gear 106 upon 'the main shaft 108 of the machine. In' the arrangement shown, this gea-r 106 is loose upon the shaft '108 and is adapted to be connected thereto to drive a cam plate 110 by means of anyV suitable clutch 112 (Fig. 1) controlled bya treadle rod 114. It will be observed that the. camv plate 110 is provided with cam tracks or grooves 116 and 118`controlling the movements of the'stampinghead i 16 and the work carrying table 18.

In order that the wedge member 24 ,may be impositively operated in one direction to carry `the stamping head 16'just into contact withk the work, and positively inthe other direction to ,lift the stamping head from the work, the machine is provided with a two-partnlever, the lower arm 120 of which is pivotally mounted on a rod 122 and is provided with ak roll engaging the cam track 118. The upper arm 124 of this lever'i's pivoted to the lower 'part 120 at an intermedi-x ate point 125 and is impositlvely connected thereto by means of a spring'126 surrounding a rod 128 passing through journal blocks pivoted in the upper end of the member120 and in an intermediate portion'of the arm 124. Lock nuts 130 are' provided for adjust-` ing the tension of the spring-126 andholding it in adjusted relation. The upper end ofthe lever arm 124 is connected by a link 132 to the wedge member 24 so that when the ca m movesthe lever arm 120 to the left in Fig. 8, the wedge member 24 will be impositively moved to the left'to bring the type pieces or dies in the stamping head V16 into Contact with the piece of work inthe machine. Just'as soonas theyconta'ct with the piece of work, however, the upper and lower arms kthe surface of the thinnest sole.

124land 120 ofthe two-part lever will separate against the tension*r ofthe spring 126,.

.It will be evident that the cam pathk 118 must be of such -adesign that the maximum desired throw can be imparted to the lever V120, 124 so that the dies will Contact with Consequently, when'the dies contact witha sole thicker than this minimum, the action ofthe wedge member 24 will be resisted andthe spring126 caused to stretch as the lower arm 1,20V continues to move under the actionof the cam path 118,V without forcing any further movement of the dies. 1

When pressure is appliedto the work by lifting thework table 18,' the wedge member 24 ywill be securely locked in any position which it may have assumed as the beveled edge 25 isforced into the'groove 27 by such pressure. The design of this groove and the beveled edge is such that as soon as the pressure has been relieved, there is little, if any, tendency for the wedge member to stick, and even if there should be any such tendency, it would be promptly lovercome'by the positive action ofthe 'two part leverf120, 124

as the lever is swung toltheright, viewing the machine as in Fig. 8, in order to returny the wedge member to its original position.

It will be remembered that the connection between the wedge member 24 and the forked plunger 20 which carries the stamping Vhead 16,-is such that the return of the wedge member to its original position is effective posi# tively to raise `the stamping head16fto its original position at a point having maximum back to itsforiginalposition buttthe stamping head 16 is alsoliftedpositively back to its original position, thereby.: facilitating rapid use of the machine. i' Y f The lifting of the work the stamping head 16 to markthe work is effected by means of a lever 140 piv'otally mountedat its lower end onl the cross vrod' 122, and provided at its upper end with aroll engaging the cam track 116.V A midway point on this lever 140. is connected to a link`142 joining anotherA link 144, which is connected to a toggle madey up of an upper member' 146 and a lower member 148. l/Vhen the lever 140 moves to the left in Fig. 3: it

table 18 to causev separation from the work table. Thus, not only the wedge member 24 is moved positively' .straightens vthe toggle, carrying it slightly spring stud 160 in the handle with one of the holes 162, 163, 164. The arrangement is such .that when the adjusting handle 158 is in the illustrated position the pivot 15() will be in its lowest position, thereby lessening the angle between the links 142 and 144 and effectively shortening the connection provided by Said links so that the same amount of movement of the lever 140 will be effective to cause a greater displacement. of the work table 18 than will be the case when the links 142 .and 144 are more nearly in a straight line and, therefore, effectively lengthcned, because in the latter condition, the toggle will be nearer straight to start with and the same amount of lateral movement of its intermediate pivot will produce less upward movement of the work table before the toggle passes dead center.

Shoe soles not only have small variations in thickness owing to imperfect grading of a single lot of soles, but in different lots may be radically different in thickness, depending, for example, upon whether they are socalled single soles or double soles. In order to provide an initial adjustment of the -work table 18 in accordance with the class `of soles being stamped, the machine is provided with another adjusting handle 168 which is similar in construction to the handle 158 and which may be moved from a low position determined by the locking recess 170 to a high position determined by the locking recess 172. The turning of this handle rotates a transverse stud 174 which is provided with an eccentric portion 176 which forms a fixed pivot for the lower toggle member 148. Thus, with the operating link members 142 and 144 in a fixed position, adjustment of thc handle 168 lifts the toggle as a whole and, hence, the work table 18 to vary its initial position, thereby to lessen the compensation required of the automatic apparatus in the head of the machine.

In the operation of the machine, the type pieces and dies upon the stamping head 16 are adjusted, either by rotation of the handle 36 or by placing new pieces 58 or 60 in the auxiliary carrier 38, and the operator will adjust the handle 168 to set the table 18 at a level in accordance with the class of soles to be treated. He then will insert the fanned soles successively laterally into the recess 14 of the frame with the assistance of the guide and position the ends of the soles against the previously adjusted gage member 66. Depression of the treadle rod 114 closes the clutch and effects a single rotation of the cam 110 to cause the machine to go through its cycle of movement or, if the treadle is held down, the cam 110 will keep on rotating. This will first move the wedge member 24 impositively to the left in Fig. 3 to depress the stamping head 16 into firm contact with the work irrespective of its exact thickness and will hold said stamping head locked in this position. It will next straighten the toggle 146, 148 to lift the work table 18 to force the work into stamping engagement with the stamping dies in the head 16.

During the stamping movement, which in this case is effected by the lifting of the work table, the opposing abutment, formed here by the stamping die, is locked in position by reason of the locking of the wedge member 24, and after the stamping has been completed, the wedge member is moved positively to return it to its original position and the stamping die is lifted positively away from the Work. In case the characters 65 are not impressed to the exact depth required for the best quality of work, the operator may adjust the handle 158, either to the left to lessen the depth of the impression, or to the right to increase it. The finger 74 of the guide 70 will act as a stripper to keep the soles from clinging to the die and will thereby facilitate the rapid presentation of successive soles to the machine.

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

1. In a stamping machine, a frame, a movable worl: supporting member, a reciprocable die member, a slidable wedge for producing a preliminary measuring movement of one of said members to bring said member just into contact with opposite surfaces of the work, means for imparting an additional pressure to one of said members to cause an nnpression of the die, and coacting surfaces upon said slidable wedge and the frame of the machine constructed and arranged radically to increase the friction between said surfaces upon the application of pressure, so as to prevent displacement of the wedge in the direction of its length when operating pressure is applied to cause the die to stamp the work.

2. In a stamping machine, a reciprocable stamping die, a reciprocable work support in line therewith, a. wedge for imparting a preliminary relative measuring movement to one of said members to bring said members into contact with opposite faces of a piece of work, means for imparting an additional impressing movement to cause the die to stamp the work, and means for locking said wedge against displacement by said impressing movement.

3. In a stamping machine, a work support, a stamping die, means impositively connected in one direction to one of said members for producing a preliminary relative measuring movement of approach between said members, means for imparting an additional, impressing movement to one of the members, and means for locking the other member against displacement by said impressing movement.

4. In astamping machine, a work support, astamping die, means for producing a preliminary relative Vmeasuring movement ot approach between said members, said means comprising a slidable member,means for apwork support to produce an impression of Cil the die upon the work, and means rendered effective by said pressure to lock said cam against displacement. Y

i6.l In a stamping machine, a frame, a work supporting member, a stamping die member, means .for producing a preliminary measuring movement of approach between said members, 'said means comprising a slotted cam slidable in a straight line in the frame of the machine, the slot of which cam is operatively connectedv to one of said members, means for applying an impression producing pressure to the other of said members, and means for automatically locking said slidable cam, in any position which it-may assume, 'against displacement, by the pressure applied to produce an impression. Y l

7. Ina machine of the character described, a. trame, a movable work supporting member, a reciprocable tool member, a slidable part for producing a preliminary measuring movement of one of said members, means for imparting an additional pressure to one of said members to cause an operation oi. the tool, and coacting locking surfaces upon said slidable part and the trame of the machine, constructed and arranged to prevent sliding movement of said Vmember when operating pressure is applied to cause the tool to operate upon the work.

8. In a. stamping machine, a frame, a reciprocablestamping die, a work support reciprocable in a. line therewith, a slidable wedge member for producing a preliminary measuring movement of the stamping die, said wedge member being provided with a beveled edge portion and said fra-me being provided with a correspondingly shaped groove tor the reception of the beveled portion of said slidable member, and means Jfor applying pressure to said work support to cause the die to make an impression in the work, forcing the beveled portion of the slidable member into the groove in the trame, and locking said .slidable member against displacement.

9. In a stamping machine, a work support, a stamping die, a member for producing a preliminary relative movement of approach between said support and die to bring the support and die just into contact with opposite faces of a piece of work, and means for moving said member impositively in one direction and positively in the other direction.

10. In stamping machine, a work support, a stamping die, means for producing Y a preliminary relative movement of approach between said support and die comprising a wedge member, and means for moving said wedge member impositively in one direction and positively in the other direction.

11. In a stampingmachine, a work support, astamping die, meansA comprising a wedge member yfor producing a preliminary relative movement of approach between said l support and die upon movement of said wedge member in one direction, said wedge member being constructed and arranged positively to separate said work support and die member upon movement inanother direction whereby the maximum possible space between the die and the work support is insured, to facilitate the insertion of work pieces inthe machine.k

12. In a stamping machine, a frame, a work support, a slidable die-carrying head movable towardand away from said worksupport, a cam slidable in the frame of said machine, said cam having an inclined slot for the actuation of the die-carrying member, and means `tor sliding said cam in said frame to move the die positively both toward and away from `the work support.

13. In a stamping machine, a frame, af

work support, a slidable die carrying head, a wedge member slidable in the frame of said machine,lhaving an inclined closed cam slot to produce relative movement of said work support and said diecarrying head to bring them just into contact with the opposite faces of a piece of' work, means for impositively sliding said wedge member so that it may stop when the member actuated thereby comes in contact with the work, and means for moving positively the slotted wedge member to separate said work contacting members.

14. In a stamping machine, a frame, a work support, a slidable die-carrying head movable toward and away from said work support, a wedge member slidable in the frame of said machine, said wedge member having an inclined cam slot for the actuation of the die-carrying member,and means for impositively sliding the wedge member to cause la preliminary movement of ap-l proach Vof the die member toward the work support thereby to contact with a pieceot1 work. e

15. In a stamping machine, a movable operating member, means for moving said member impositively to eii'ect a preliminary measuring of the thickness of the work, said means comprising a jointed lever havingoverlapping ends which abut to render theilever rigid for action in one direction, means for swinging said lever, and resilient means normally maintaining the angular relation oit the parts of the lever with said ends in abutting relation and constructed and arranged Yto allow a change in the angular relation of said parts when the operating member contacts with the work. Y

16. In a stamping machine, an operating member movable inte engagement with a ieee of work, means for moving said mem-V er into engagement with the work to etfect al preliminary measurement of the thickness of the Work, said means being constructed and arrangedc'to hold said member firmly in opposition to the pressure aii'orded by another operating lmember, means for impositively actuating said moving means, said last named means comprisingfa jointed lever, a spring for holding the parts ot said lever in a predetermined angular relation in which they are substantially in alinement, and ineans fer moving said lever through a iixed distance to bring said :operating member into Contact with the work, and then to displace the rela.-Y ti-ve angular relation of the parts of said lever against the tension of said spring Y 17. In a stamping machine, a work supporting member and a stamping member, each movable toward and away 'from the other, means for impositively moving one of said members toward thezother to bring said members into contact with the opposite sides of the Work and to hold one of `die members rigidly in the position which it has assumed, andY adjustable means fo Ymovingfthe other member to :effect an impression of determinate depth in the work without substantiallyraffecling the initial position ot the work support, said means comprising a toggle, an operating link for straightening saidV toggle comprising pivotally connected parts, means for positively supporting the pivotal connection of said parts, and means for varying the effective length of said link by varying the position of said supporting means, thereby to straighten or bend the link.

i8. In a stamping machine, a die-carrying member, a work supporting member, said parts being mounted for movement toward and away from each other in a straight line, means for iinpositively moving one ot said members to bring it into contaet'with the Vtace of a piece of work supported on the other member and to hold the member in iii-m contact with the work, operating means for moving said Work supporting member to eif I'ect an impression ot the die upon the work, said means comprising a toggle, and an eccentric bearing for one end of said toggle constructed and arranged to allow a preliminary adjustment of the position'ot said work supporting member in accordance with the range of thickness of work pieces.

19. In a stamping machine, a frame, a diecarrying member and a work support each mountedrifor movement toward Vandaway from the other in a straight line, means for preliminarily adjusting the position ot one of said members in accordance with the generai range Yof thickness ot the class of work under consideration, means including a resilient member for effecting a preliminary measuring movement of one ot said members to bring it intoY contactVY with the work Without thereby disturbing the adjusted position of the other member, and a positive operating means YVfor then bringing said members to-l gether to stamp the work. Y Y

Y 20. In a stamping machine, a work support and a die-carrying member, each movable toward and away from the other in a straight line, impositive means for preliminarily bringing said members into con'lact with the opposite sides of a piece of work, positive operatingmeans for causing a further relative movement of said members to effect a stamping operation, and an eccentric connected to the positive Yopera'fing means for determining the initial position of the worksupport. l

21. ln a stamping machine, a die-carrying member and a work supporting member mov` able relatively to contact with opposite sides ot a piece oi work, means for adjusting the position of one of said membersin accordance with the thickness of the class ot' work to be stamped, means for impositively effecting relative movement of said members into contact witlrthe opposite sides ol a piece of work, positive means oretleciing a further relative movement oit' said members to stamp the work, and means for adjusting the depth of the impression Yproduced by said lastnamed means. f

22.#111 a stamping machine, a work support, a die-carrying member in line with said work support, means for impositively positioning said die-carrying member and rigidly holding it in posilion Vin engagement with one tace ot a piece of work positioned upon said work support, a toggle for operating said work support to eiiect an impression of the die', an eccentric bearing for one end ot' said toggle, and means for operating said toggle comprising pair ef pivotally connected links, a support for iid pivotal conneciion, 'and an eccentric for-2 adjusting the position et said support, thereby to determine the depth of the impression produced. i Y

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

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