US1144340A - Embossing-machine. - Google Patents

Description

D. R. CAMPBELL.

EMBOSSING MACHINE.

APPLICATION FILED DEC. 26. 1914. I 1,144,340. Patented June 22, 1915.

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EMBOSSING MACHINE.

APPLICATION FILED DEC. 26. 1914.

1,144,340. Patented June 22, 1915.

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D. R. CAMPBELL.

EMBOSSING MACHINE. APPLICATION FILED DEC. 26, 1914.

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EMBOSSING MACHINE.

APPLICATION FILED DEC. 26. 1914.

1 1 44 ,340. Patented June 22, 1915.

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n. R. CAMPBELL.

EMBOSS|NG MACHINE.

APPLICATION FILED DEC. 26. 1914.

1,144,340.. Patented June 22, 1915.

5 SHEETS SHEET 5- 6% I HM invented certain DUNCAN B. CAMPBELL, or BOSTON,

FRANK RUMRILL,

massncnusnrrs, or NEWTON, MASSACHUSETTS.

ASSIGNOR OF ONE-HALF TO rimeossme-mecnmn.

Specification of Itetters Patent.

Patented June 22, 1915.

l Application filed December 26, 1914. Sex-mime. 879,219.

To all whomit may concern:

Be it known that I, DUNCAN R. CAMP- BELL, a subject of the Dominion of Canada, and resident of Boston, Suffolk and State of Massachusetts, ave

new and useful mprovements in Embossing-Machines, of which the following is a specification.

This invention relates to certain improvements in embossin machines, and themvention consists in eatures of novelty hereinafter described and claimed.

Briefly stated, the chief improvements consist in (1) a construction and arrangement which will permit setting a die in the machine and adjustment of the work to be operated upon without danger of the operators hands being broughtinto contact with hot metal, (2) mechanism which automatically permits the die block to reel rocate when the platen is in a predetermined positionbut prevents such reciprocation at other times except when such mechanism is tripped by the.hand or foot of the operator, and (3) die-reciprocating mechanism which permits a relatively long dwell. of the die upon the work to set the impress, said mechanism having adjustable provisions whereby the die may be permitted to yield 0 a predetermined degree upon impact with the work or to a degree proportionate to inequalities in the thickness of the work.

f the accompanying drawings, which are somewhat conventional and diagrammatic: Figure 1 is a front elevation of one embodiment of an embossing machine in which my improvements are incorporated. Fig. 2 is, a right side elevation of the maf chine. Fig. 3 is a vertical section through the machine, from front to rear, as indicated by line 33 of F ig. 1. Fig. 4 is a horizontal section through the knuckle of a toggle included in the mechanism for reciprocatin the die block. Fig. 5 is a view, partly in plan and partly in section, indi cated by line 5-5 of Fig. 3. Fig. 6 is a view, partly in elevation and partly in section,' indicated by line 66 of Fig. 1. Fig.

is a top'plan view, indicated by line 7-7 of Fig. 3,.of the die block. Fig. 8 is a verti cal section through the die block, as indicated by line 8-8 of Fig. 3. Fig. 9 is a right side elevation of mechanism for con- I trolling the power by which the dieis rein'the count of F view shows the parts in the position they occupy when power is transmitted to the reciprocating mechanism. hows a portion of the mechanism in'Fi 9, but-when the parts are in the position shown in this figure the power is cut oil, Fig. 11 is a section, taken ciprocated. This ataslight angle to the vertical, through the power-transmitting coupling shown in Figs. 9 and 10. Fig. 12 is a view, as from the right of Fig. 10, of-the wedge member which occupies the groove in and I(:lperates the coupling pin. Fig. 13 is an e a portion of the mechanism shown by Fig. 9. Fig. 14 is a front elevation of the parts shown by Fig. 13. Fig. 15 is a fragmentary section indicated by line 15-15 of Fig. 11.

Fig. 16 (Sheet 4) is a fragmentary View, in

elevation, showing my preferred arrangemeit of the bearings for the poweror cam-- The same reference characters indicate t e same parts wherever they occur.

Referring to thedrawin 's, Figs. 1, 2 and 3 show supports of suita 1e height, indicated at 20, 20, to which may be secured by any suitable means the feet 21 of the frame of the machine. The frame has a base portion 22 on which are mounted, near the ends thereof, vertical members 23. Each member 23 h The members 23 are secured to the base portion 22 in any desired manner. A cross head 23 issecured to members 23 by bolts 25. ach member 23is formed with a l teral projection 26, and the crosshead has enlarged portions 27, 27 one near each end and In vertical alinement with projection 26. Each projection 26 and the alined member 27 afl'ordv a bearing for a vertical guide rod which reciprocates therein and prevents skewing of the die block, presently to be described Each vertical guide rod, 28, has ,a shoulder near its lower being clamped against the upper surface of an" ear of the d ie.block by a nut 29 screwed upon the reduced lower end of the rod, beneath the die block.

The driving shaft of the machine is indicated at 30, is journaled in boss; portions 24 of the web, and is provided with the usual adjustable friction hand brake used for overcoming momentum,

the coupling argement, in right side elevation, of

as a rearwardly extending web 24. I

which brake is H shown at 125 but which need not be described. Power is transmitted to theshaft and-38 respec y.

' to keepthe pins and sald groove 34) and to leave an oblique transverse vpression for coaction with a wedgingmem- 'pling comprises a cylindrical member made integral with .the shaft or may be aflixed concentrically thereon' in .anydesired manner. Still referring to- Fig. it

will be seen that the coupling has spr1ng-- pressed pins 35 and 36 which are arranged in slots parallel-to the slots' being provided with screw-plugs 37 ing to adjust the pressure of the springs and springsin place. 7 Pin 35 extends across the-annular groove 34,-the longitudinal" axis of the pin coinciding withthe periphery of the bottom of th'egroove,

said pin 35 having a portion cut away to leave a depression in the pin (the-upper surface of the reduced portionof the pin being substantially flush withthe bottom of shoulder at the right of the deber by which the pin isforced inwardly against the tension of'its, spring and its point drawn into the member 33. The 0 eration of this device will be subsequent y explained, but it may be well to state at this time that the purpose of the pin 35 is to coact with one of the detents 32 of the pulley hub and thus impart rotation to the i I shaft 30. Pin 36 is more distant from the axis of the coupling than is pin 35, and its purpose is to prevent 35 before 35 can be operatively engaged by a detent 32 if it should strike the crown of a detent when first released. Itfthus insures a complete reciprocation of the die before the power is cut oif. A pin 135, best shown by Fig. '15, bears against the depressed surface of pin 35, permittingsaid pin 35 to slide but not to roll. I

. Referring to Figs. 2 and 3, rigidly mounted upon shaft 30 and approximately at its center is a cam 40 provided with a groove 42 straddles the shaft 41. A forked member 30 and has its shank, on which stud is mounted a cam roll 41' positioned in the cam groove. 41. The shank of the member 42 is apertured,

- screw-threaded and split at its end to form bolt 43 bein a'clamp for the reception of a bolt-43, the securely held in the aperture by means 0 4 a clamping bolt 44 extending 1) pro vided with detents 32 projecting from the ts, being. used.

axis of shaft 30, the ed toa swing on these screw-plugs serv-.

the withdrawal of pin well-known a stud projecting laterally from through lugs .or ears of the member 42 and drawntight by a nut 45. Prior to securing bolt 43 in the member 42 there are assembled upon said bolt 43 a clevis'"46 (see Fig. 3), a compression spring 47, nut-.48, and loclmut 49. 'The purpose of the spring47 to bring the head contactlwith the clevis, or. thereafter to increase the resistance of the spring. Locknut 49 holds the nut 48in the position to which'it is adjusted. The arms of the clevis are arranged to receive the knuckle pin 50' of toggle members 51 and" 52, and the toggle members" and clevis may, if desired, be arranged .on the pin 50 in the manner shown by Figs. land 4., J Toggle arm 51 is mounted to swing on a pin53 arranged in downwardl extending portions of the crossbar 23". .zsee liig. 1.) Toggle arm 52 is mounta pin 54 arranged in the head55 of the die block. The head 55 of the die block has a concentric downwardly nut 48. is to cause.

of bolt 43 into 7 projectingcylindrical portion which enters a complemental socket atthe'upper end' of an adjusting screw 57, said screw being provided with an annular flange 56 which has radial slots into which a tool may be intro duced for revolving" the member 57. The screw 57 has a concentric vertical aperture. through hich a stud 58 is passed to hold the. screw closely but rotatably in contact with'the head 55; Screw 57 is externally threaded to coactwith" complemental screwthreads in the body 59. of the dieblock, the

left of Fig. 1 and in dotted 'lines at the upper. right of Fig. 3. Referring to the latter figure, wires 62, 62', loosely arranged,

lead from the rheo stat through the web 24 and through an aperture in the upper ortion of the .die block to heating chain rs 63, shown by Fig. 8, which'may be. of

form and arrangement but which I have shown as formed in a hollow detachable member 64 of the block body 59, said member 64 being slidable in dovetail ways extending from front torear ,of body any 59, and being held stationary by any suitable means, not shown.

Mounted near its ends in 1, 2 and 3) secured upon the frontandrear ends of the member 64 is an adjusting screw 66 having ath-read of left-hand lead on the forward ortion thereof and) a' thread of right-ban lead on ed to slide along the screw66 in dovetail ways provided in the member 64, between the heating chambers" 63, are die-clamping jaws 67 and plates 65 (Figs the'rear portion. Mount- 68 which, upon rotation ofthe screw, will recede from or approach each other-according to the direction of rotation.

The ends of screw 66 are suitably shaped for engagement by a wrench.

' .A bed 69 (Fig. 3) is rigidly secured on the base member 22, as by bolts 70. The bed is provided with ways 71, 71,- which comprise elongated raised portions having longitudinal grooves 72, 72 in the upper surface thereof. A wor' support, platen or printing bed is indicated at 73, said platen being provided With members 74 the lower endsof which are arranged to slide in the grooves 72. A link 75 is connected at one end by a stud 76 to the rear of the body of the platen, the other end of said link being connected to the long arm of a" lever 77. Lever 77 is mounted on a fulcrum stud 78 which projects horizontally from a supporting bar 79 bolted to the bed 69. The short arm of lever 77 is connected by a stud 80 to a link 81 which in turn is pivoted. to arm 82 of a treadle 83 fulcrumed at 84 in a member 86 bolted to the floor. The treadle has a footengaging portion 85 easily accessible to the feet .of machine. Attached to the arm 82 of the treadle is a bar 87 on which a counterweight 88 may be adjusted to maintain the footengaging portion 85 of the treadle in raised position and to return the platen to its forward position after the treadle has been depressed by the operator. The platen is provided at its front end with a handle 89 which may be engaged manually to move the platen back and forth if desired. Bolted to the bed 69, just beyond the extreme rear portion of the platen, is a bar 90 having an abutment screw 91 whereby the platen will be brought to rest and normally held at a osition predetermined by the adjustment of t e screw. The platen may be locked in its rear position by a clamp which includes an angle bar 126 bolted to the front of the bed, a locking plate 127 mounted on a pin 129 projecting horizontally from the bar 126, and a wing nut on said pin which 00-,

acts with plate plate 127 is in tion.

A handle 92 at the front of the machine connects the short arms of levers 93, 93, each of which levers is fulcrumed as at 94 on a stud projecting laterally of one of the ways. Each-of the longer arms of the levers 93 has an end portion (Figs. 1 and 6) curved inwardly as at 95 to engage 127 to lock the platen when .theunder surface of a yoke 96. Each yoke 96 has ears 97 in which are aflixed vertical lifting pins 98 which slide in bearings in members 105 formed on or secured to the Ways. The depression of handle 92, have point contact with the platen 73, the platen having notches 106 for the reception of the ends of the pins.

the operator standing in front of the 1 arm 103, the

vertical longitudinal posifrom the outer side shaft 103 is an arm 113 pins 98,.when elevated-by the The platen may therefore be raised from the ways and returned thereto without being skewed. v

Mounted on the right side of the platen, midway between the front and rear thereof, is a member 99 having an adjustable vertical contact screw 100. traveling to its rear position and has almost reached that position, the screw 100-engages the lip 102 of a trip member 101 (shown best by Figs. 13 and 14) mounted on an arm 103' of a. rockshaft 103 journaled in the frame member 23 at the right of the machine. The member 101 oscillates on pin 104 which extends through a boss on the member, the boss. being cut away for the reception of the end of arm 103. When the lip 102 is struck by the screw 100 as the platen is moving to the rear, the member 101 acts as a lever to cause arm 103' to be carried rearwardly, whereby shaft 103 is rocked and the powercontrolling mechanism is operated through the means shown by Fig. 9, soon to be described in detail. A thumb lever 107 ailiXed to the right side of member 101 as shown by Fig. 14, may be engaged by the thumb or finger of the operator, either to carry the arm 103 rearwardly to operate the powercontrolling mechanism or to prevent operation ofthe power-controlling mechanism by tilting the nose 102 so that it will not contact with screw 100 upon rearward movement of the platen. B contacting with the hub of lever 107 prevents too great oscillation of member 101 when lip 102 is thrown toward the front of the machine, the member 101 being unable to assume a position from which it cannot be returned by its own weight to the position indicated in solid lines in Fig. 13. The end of the pin 104 which projects as shown by Fig. 14, has thereto a flexible connection 108,

attached such as a cord or chain, which passes over a When the platen is sheave 109 and downwardh to a tread-1e 110 to which it is secured, the weight of the treadle being compensated for bya tension spring 131 attached to the treadle and to a rod 132 projectin inwardly from supporting member 20. ee Figs. 2 and 1; Treadle 110 is fulcrum ed in member 112 fastened to the floor, and has a. foot-engaging portion 111. Depressing foot-engaging'portion 111 of the treadle causes arm 103' to rock toward the rear. mechanism is therefore caused to operate either automatically or by the hands or feet of the attendant. j

Bigidly secured to the outer end of rockconnected by a link 114 to the lower arm of a. lever 115, the lever being fulcrumed on stud 116 which is secured in frame member 23 'at the right of Fig. 1, the stud havinga sleeve 117 thereon The powercontrolling through link 118 to a member 119 pivoted on a stud 121, the member 119 having an elongated hub or sleeve 120. A helical torsion spring 122' isarranged on the hub, one end of the spring being anchored to frame member 23 and the other end of the spring bearing upon the body of member 119 to force a portion thereof into the annular groove 34 of the coupling 33. j See Fig. 1.

Assuming that the machine is at rest, with the member 119 in the position shown by Fig. 10, with the loose pulley operating, and with the platen in its forward position, the power-controlling mechanism will operate as follows: When the platen 73 is driven to the rear by depression of the foot-' engaging portion 85 0f its treadle, or by the hands of the operator, abutment screw 100 strikes lip 102 of member 101, causes shaft 103 to rock rearwardly whereby its arm 113, through link 114, rocks lever 115 which acts link 118 to partly withdraw member 119, againstthe pressure ofspring 122, from the groove in coupling 33, where the member 119 was holding coupling pin 35 out of contact with the detents 32. See Figs. 10 and 11. Pin 35 is at once forced out by its spring member 119 would. be forced back into the depth of the groove 34 by its spring 122 and into contact with the angular shoulder of pin at once, perhaps too quickly to allow pin 35 to coact with another detent if its point struck the crown of one detent when released; but pin 36 of the coupling, which, before the machine had come to rest, had been driven into its slot by the member 119, is forced out of its slot by its spring when the member 119 is withdrawn, and said pin 36 contacts with an arcuate portion of themember 119, as shown by Fig. 9, to'prevent 119 from contacting with the angular shoulder of the pin 35. In other words, the member 119 cannot drive the pin 35 into the coupling unless the wedge portion of 119 .has

first met the tip ofpin 36 and driven it into its socketl After thewedge-of 119 has thus driven inwardly the .pin 36, it may engage the shoulder of pin 35 to withdraw that pin from the coacting detent. From this it will be understood that, whenever the member 119 is withdrawn, the shaft 30 will revolve groove 34 until the controlling mechanism is until the pin 35 is driven inwardly by the wedge end of 119, which will be one revolu tion of the shaft 30, after which revolution the arcuate portion of the member 119 will contact with the bottom of the annular again operated to withdraw 119. The friction band hereinbefore referred to, and

'shown at the left of Fig. 1 and toward the right of Fig.3, willovercome the momentum of the shaft when the coupling pin is drawn in, .and a projection 128 on the periphery of the toppling will'contact with an abutcaused to reciprocate horizonta to contact with a detent 32. The

spring 47,

' such gentle ment block 129, secured to the member 119, to positively prevent further rotation of the shaft until the controlling mechanism is again operated.

To set a die in the machine, the die may be placed on the platen its forward position, manually Fig. 13 so that its lip 102 shall not be en- 'the member 101 be gaged by abutmentscrew 100 and therefore cause the die block to reciprocate, and the when-the platen is in a tilted to the position shown-by treadle of the platen be depressed to carry The operator then hand of the operator, and the platen be allowed to descend. Of course, if the treadle mechanism is not used and the llplaten is not the platen will merely be raised by handle 92 to bring up the die. Y i

It is thought that a brief description of the operation of the die block reci rocating mechanism will be sufiicient. ssuming the head of the bolt 43 being held in 0011- tact with the clevis 46. .On the return movement of the membersthe pushing force imparted to the member 42 will not compress because tact with the head of the block 43 by the force of gravity acting upon the die block.

the clevis is kept in coni that themachine is started fromthe posi- Not until the impact of the die upon the work takes place may the spring 47 be compressed; and the amount of yielding of the die may be nicely justment of the nut 48 on the bolt 43. By yielding as is made possible by this arrangement, the result of the operation on the work is noticeably improved, the possibility of damage to the face of the die by slight errors of adjustment when operating upon thin work is decreased, and inequalities in the thickness of the work are compensated for.

I By my improved construction and arrangement of the horizontally and vertically reciprocating work support or platen, the power-controlling means, and the platenoperating mechanism, the operator is enabled to work at a position some distance from the electrically heated die block, thus predetermined by the ad-- avoiding discomfort from. the a heat. He

may conveniently adjust the work, or any 1,144,340 g at embellishing material on he' work, with by movement of the printing bed toward the great precision. By depressing the d1e to cause reciprocation of the die, said treadlesof the platen to carry the work unmeans having provisions manually adjustder the die, the die will operated autoable to permit die-ward movement of the matically by the time the work is in its printing bed without causing reciprocation proper position thereunder, unless he trips [of the die. a member 107 of the power-controlling mecha- 3. In a machineof thecharacter described, nism to preventthe operation of the die, and the combination with means for engaging the platen and finished work will return to and vertically reciprocating a die, and a 10 the operator when he releases the treadle, work support arranged to be reciprocated the use of the operators hands being rehorizontally, of means for raising said supquired only for adjustment of the work on port' and returning it to the plane of its the platen and removal of the finished work horizontal reciprocation. therefrom. A die my be set in the die block, 4. In a mach ne of the character described, 15 or removed therefrom, without the necesthe combination of a work support arranged sity of introducing the hands under the die to, be reciprocated horizontally and vertiblock or bringing them into contact therecally, and means for holding a die, said diewith, by meansof the vertically and horiholding means being arranged so that the zontally reciprocatable platen. The powerdie may yield a ainst spring pressure upon 20 controlling means are so arranged that the engagement wit the work. operator, either by hand or foot, may cause 5. Ina machine of the character described, a second impact or a series of impacts of the the combination with a work support ardie upon the work. The locking means for ranged to be horizontally and vertically revkeeping the platen under the die are useful ciprocated, of means for vertically recipro- 25 when adjusting the depth of the plunge of eating said work sup ort, said means inthe die block, and the means for preventing eluding a plurality of levers spaced apart the platen from passing beyond a piedeterand fulcrumed in alinement, a handle conmined rear position serve to bar work units meeting said levers, and a plurality of vertifrom being carried too far to therear, or, cally movable yoke members each of which to in other words, the Work units all occupy is arranged to be engaged and operated by the same vertical plane when operated upon, one of said levers, each of said yoke memprovided the platen has been im elled to the bers having a plurality of vertical lifting limit of its inward or rearwar movement. ins arranged to contact with suitably With regard to the die-reciprocating ormed under portions of said work support 85 mechanism, I consider the camof my deto prevent skewing of said work support sign, as shown on the accompanying drawwhen the latter is supported by said pins. ings, to be one of the important features 6. Inamachine of the character described, whereby most excellent results are obtained. in combination, a Work support arranged to According to the construction and arrangebe horizontally and vertically reciprocated, so ment shown, the die is permitted to dwell, andmeans for causing said 'work, support while in contact with the work, until the normally to remain at a position forward of cam has traveled about half a revolution, the die and to return the work support to the effect of this dwell. or relatively long said forward position after said work supcontact of the die with the work, being to port has been moved from said forward poas set W th impress. The desirability of this sition. long contact has long been known to those 7. In a machine of the character described, familiar with the embossing art, but it has in combination, a work support arranged to never been caused heretofore by automatic be horizontallynnd vertically reciprocated, means, so far as I am aware. In cases means for causing said work support norto where the die is heated and used merely to mallv to remainat'a position forward of the brand the work, the prolonged yielding condie and-to return the work support to said tact will insure even impress and ,the proper forward position after sald work su port h di has been moved from said forward posltion, I l i and mechanism connected to said Work sup- M 1. In a machine of the character described, port and operable to move said work support the combination of a printing bed arranged to a predeterm ned ,posltlon beneath the die. to be horizontally and vertically recipro- 8. amachme of the character described, cated, and power-controlling means 0 erable die-reciprocating mechanism mcludmg atogbvhorizontal movement of .the printmg bed gle, a cam, and connectlng means arranged t tdward the die to cause reciprocationof the substantially horlzontally between sa d togdi gle and said cam, sald connectlng means m- 2. In a machine of the character described, cluding' a sprmg compresslble upon impact the combination with a printing bed arofthe die with the work to hold the die In ranged to be'horizontally reci rocated, of yieldlng contact wlth the work. X at ower-controlling means norma y operable 9. In-a machine of the character described, 1

10. In a machine of the character described, die-reciprocating mechanism com prising a toggle, a die carrier movable by said toggle, and power-operated means for moving the toggle alternately to an active position and to a position of rest, to success1vely pro ect and retract said carrier, said means having provisions for causin apro longed projection of the carrier an a prolonged contact of the die with the work and "provisions for imparting a yielding pressure to thedie, I

11. In a machine of the character described, die-reciprocating mechanism inclu d ing a toggle, a cam,-and connecting means arranged between said toggle and said cam, said cam being formed and arranged to permit prolonged dwell of the die when'in contact with the work durin a part of each revolution of said cam, an said-connecting rising a a die carrier movable by said toggle,

means being arranged to yield upon impact of the die upon the work.

I 12. In a machine of the character described, die-reciprocating mechanism comprising a toggle, a clevis connected to said toggle by the knuckle pin thereof, a bolt connected to said clevis and arranged to slide therein, a spring on said bolt, said spring being arranged between an adjusting nut on said bolt and said clevis, a forked member clamped to said bolt and having its branches arranged respectively above and below the power shaft, a cam on said shaft, and a roll mounted on a stud projecting from the shank of said forked member, said roll being arranged in the groove in said cam, said cam being so formed and arranged as to permit the die to remain at rest during a part of the revolution of the cam shaft while the die is in contact with the work, and said spring being compressible upon impact of the die,

whereby contact ofthe die with the work is relatively prolonged and is yielding.

In testimony whereofI have aflixed my signature, in presence of two witnesses.

DUNCAN R. CAMPBELL.

Witnesses:

C. F. Bnown, P. W. Pnzznm.

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