US1250378A

US1250378A - Sole-pressing machine.

Info

Publication number: US1250378A
Application number: US82825814A
Authority: US
Inventors: William C Stewart
Original assignee: United Shoe Machinery Co AB
Current assignee: USM Ltd; United Shoe Machinery Co AB
Priority date: 1914-03-30
Filing date: 1914-03-30
Publication date: 1917-12-18
Anticipated expiration: 1934-12-18

Description

w. c. STEWART.

SOLE PRESSING MACHINE.

APPLICATION FILED MAR. 30, 1914.

1,250,378.- Patented Dec. 18, 1917 1 SHEETS-SHEET l.

w. c. STEWARL SOLE PRESSING MACHINE.

APPLICATION FILED MAR. 30. I914.

Famed Do.18,1917.

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vinal W. C. STEWART.

SOLE PRESSING MACHINE.

APPLICATION FILED MAR. 30. 1914.

Patented De.'18,1917.

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sou; PRESSING momma. APPLICATION FILED MAR. 30. 1914.

1,250,378. Patented Dec. 18, 1917.

1Si-lEETS-SHEET 4.

APPLICATION HLQID MAR. 30, I914.

W. C. STEWART.

SOLE PRESSING MACHINE.

' Patented Dec. 18, 1917.

1SHEETSSHEET 5. I

W. C. STEWART. souz PBESSING MACHINE.

APPLICATION FILED MAR- 30. I914.

Patented Dec. 18,1917.

I ISHEETS-SHEET a.

A I 86 1mm w. c. STEWART.

SOLE PRESSING MACHINE.

APPLICATION FILED MAR. 30, 1914.

Patented Dec. 18, 1917..

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UNITED STATES PATENT easier.

WILLIAM. c. srnwenr, or swaivirscorrr, MASSACHUSETTS, AS-SIGNOR To uivirnn see-E MACHINERY-COMPANY, or PATERSON, NEW JERSEY, A conroaa'rroiv or NEW JERSEY.

To all whom may concern:

Be it known that I, VVILLIAM C. STEWART, a-subject of the King of Great Britain, residing at Swampscott, in the county of Essex and State of Massachusetts, have invented certain new and useful Improvements in Sole-Pressing Machines; and I do hereby declarethe following ,to be a full, clear, and eXact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

The invention relates to sole pressing machines, and is intended primarily for use in machines which are adapted to mold soles before they are incorporated in a shoe, although certain features of the invention may be used with advantage in other forms of sole pressing machines. I I

Sole molding machines as usually constructed are provided with two sets of molds which operate alternately, the vertically movable mold of one set moving toward the cooperating mold, while the vertically movable mold of the other set is moving away from the cooperating mold and into position to receive the sole. The mold actuating mechanism of these machines usually operates continuously during the molding of a lot of soles. the operator removing a molded sole and placing a. new sole blank on each lower moldas it comes into its position of presentation. The molding pressure is therefore applied to the soles an instant only, .and then relieved. In doing certain classes of work it is essential ordesirable that the sole be subjected to molding pressure. for at least a certain interval which may vary with the character of the stock operated on, or with the shape which is to be given to the sole. A dwell of the molds while the sole is under pressure may be secured by automatically stopping the machine when each set of molds is brought to sole pressing position. In such case, however, the length of the pressing interval de pends on the judgment of the operator, who must restart the machine after placing a new sole blank on the mold which is'in position of presentation, and the length of the pressing interval will therefore necessarily vary. This also involves undesirable loss of time and reduction. in the output of the machine, due to the fact that one set of molds "must remain idle during the entire period SOLE-PRESSING MAcHIivE.

Specification of Letters Patent.

Patented Dec. 18, 1917.

Application'filed March 30, 1914. Serial No. $28,258.

invention to provide novel and improvedmechanism which will operate to 'automatically secure-a dwell of the molds in sole pressing position for at least a predeterminedinterval, andwhich will be free from the objections mentioned. To this end the invention contemplates the provision in a machine provided with sole pressingmolds of mechanism for automatically disconnecting each set of molds from the mold actuating mechanism when the molds are in solo pressing position, and for reconnecting them with the actuating mechanism aftera predetermined period. This construction insures at least a predetermined dwell of the molds in sole pressing position, secures a uniform dwell of predetermined length while the actuating mechanism is in continuous operation, and secures the desired dwell oft-he molds in solepressing position Without requiring a corresponding dwell in the position of presentation. The mechanism for disconnecting and reconnecting the actu ating mechanism and molds may be of any suitable construction, and is preferably so constructed that the period during which the molds remain in sole pressing position may be varied to suit the character of the work beingdone.

In addition to the features outlined above, the invention also includes certain features of construction and combinations of parts which will be hereinafter described and referred to in the claims.

The features of the invention will be readily understood from an inspection of the accompanying drawings, and the following detailed description of the mechanism illustrated therein. 1

In the drawings, Figure 1 is a vertical sectional elevation showing so much of a twin sole molding machine as is necessary to illustrate the application of the present invention thereto; Fig. 2- is an elevation on a somewhat largerscale, showing the mechanism for disconnecting and reconnecting the. molds with their actuating mechanism 3.,is a detailof part of the timing mechanism; Figi is a front elevation of the parts shown in Fig. 2; Fig. 5 is asectionalplan a detail sectional elevation showing a part of the devices for controlling the timing mechanism; Fig. 7 is a side elevation showing a part of the timing mechanism; Fig. 8 is a front elevation of the parts shown in Fig. 7; Fig. 9 is a detail plan view of devices for controlling the timing mechanism; and Fig. 10 is a vertical sectional view on line 1010, Fig. 9.

In the drawings the invention is illustrated as embodied in a twin machine adapted for molding or Shaping shoe soles, having the general construction of the machine illustrated in Patents Nos. 1,003,970 and 1,003,971, dated September 26, 1911. This machine is provided with two sets of molds, each comprising a fixed upper mold 2 and a cooperating vertically movable mold a. The lower molds 4 are carried upon slides 6 mounted to reciprocate in vertically movable heads 8. Each head 8 is raised to bring the molds into sole pressing position, and lowered to bring the molds into position of clearance and presentation by a toggle comprising a link 10, the upper end of which is pivoted to the head and a link 12, the lower end of which is pivoted to the frame. Each mold carrying slide 6 is advanced as its supporting head 8 is lowered, and is retracted as the head is raised, by a lever 14 connected with the slide and operated from the toggle link 10, as fully described in Patent No. 1,003,971 above referred to. The toggles are actuated to raise and lower the mold carrying heads by cranks 16 formed on the crank shaft 18 and connected with the toggles, The cranks 16, one only of which is shown, are arranged at an angle of 180 on the shaft 18, so that whenever one of the lower molds is in its position of presentation, as indicated in dotted lines in Fig. 1, the other mold will be in sole pressing position, as indicated in full lines in this figure. One-half only of the twin machine has been fully shown, since the other half is a duplication of that shown. The two upper molds, which are mounted one back of the other in Fig. 1, are sntliciently illustrated by the one which is shown in full lines, while one lower mold is shown in full and the other indi cated in dotted lines in this figure.

As thus far described, the machine is substantially the same in construction as the machine of the patents above referred to. In embodying the preferred form of the invention in this machine, the connections between the actuating cranks and the mold raising and lowering toggles are so constructed that each toggle may be disconnected from its actuating crank when the corresponding molds are in sole pressing position, and a timing mechanism is provided for reconnecting the toggle and crank after the crank has made a predetermined number of revolutions or cycles. The devices for connecting each crank and the corresponding toggle, and for disconnecting and reconnecting the toggle and crank, are the same in construction and mode of operation, and one set only of such devices have therefore been illustrated and will be described. As shown, the means for connecting the crank 16 with the toggle links 10 and 12 comprises a link formed in two

sections

20 and 22. The section 20 engages the crank 16, and is mounted to slide on a rod 24: secured to the section 22. The section 22 is connected with the pivot pin 26 of the toggle, and its free end is adapted to butt against the free end of the section 20, as indicated in the drawings. The means for connecting or looking together the sections of the link consists of a latch lever comprising two arms 28 pivoted on the toggle pin 26, and provided at their rear ends with hooks or recesses 30 adapted to engage pins which project from the sides of the link section 20. The arms 1.3 of the latch lever are connected by abolt 34: which overlies the link section 22, and are also connected at their front ends by a bolt 36 and spacing sleeve 38. When the latch lever engages the pins 32, the sections of the link are connected or locked together so that they form in effect a rigid link connecting the toggle and crank so that the toggle is reciprocated by the crank. When the latch lever is swung into the position indicated in the drawings, the section 20 is free to slide back and forth on the rod 24 of the section 22 as the crank 16 revolves the toggle remaining in solo pressing position, while the crank revolves idly until again reconnected with the toggle by the engagement of the latch lever with the pins 32. When the latch lever is reengaged with the pins, the crank during its next revolution will actuate the toggle to move the lower mold into a position of presentation and return it to sole pressing position. As the crank brings the toggle and mold into sole pressing position, the latch lever 28 is swung into the position indicated in the d *awings to disconnect the toggle and crank by a cam l0 arranged to engage a roll 42 on the projecting end of the bolt 36. The toggle will now remain in sole pressing position against a stop screw 4L4 until the cam is operated to release the latch lever and allow it to reengage the pins 32, and thus reconnect the crank and toggle.

The latch controlling cam 4-0 is formed on a lever pivoted on a stud 46 and held in normal position by

toggle links

18 and 50, one of which is pivoted to the cam lever. and the other of which is pivoted on a fixed stud The links are connected by a pivot pin and are provided with stop shoulders for determining the straightening movement of the toggle. The toggle is broken to render the earn &0 inactive, and thus reconnect the crank and mold actuating toggle, through an arm 58 secured to a rock shaft 60, and carrying a roll 62 which engages a slot formed in a lug 64 which projects from the toggle link 50. The rock shaft- 60 is forcedcycles. As shown, this timing 'mechanism comprises an arm 68 carried by a ,ratchet wheel 70, and arranged to engage the lower end of the lever 66. The ratchet wheel 70 is mounted to turn freely upon a stud 72, andis provided onits rear face with a step lug 74 adapted to vengage a fixed stop lug 7 6 and determine the normal or initial position of the ratchet wheel. The ratchet wheel isforced in a directionto engage the stop lug 7 1 with the stop 76 by a torsional spring 78, one end o'f which engages a fixed pin 80, and the other end of which engages a pin 82 projecting from the rear face of theratchet wheel. The ratchet, wheel is advanced against the tension of the spring 78 thefdistance of one toothduring each revolutionof the crank shaft of the machineby an actuating pawl Sat pivotally supported on one arm of a bell cranklever 86, the other arm of which carries a roll engaging a cam 88. ,The cam 88 is secured to'a cam shaft 90 which is driven from the crank shaft and is given one revolution for each revolution of the crank shaft. The pawl8 l isforced toward the ratchet wheel by a, SpringQQ, and the tail of thepawl is provided with a pin 94 arranged to engage a stop finger 96 on the lever 86 and limit the forward movement of the pawhso that the pawl will disengage the ratchet wheel during each downward stroke of the pawl carrying lever. The ratchet wheelis held. against reverse rotation, after being advanced by the pawl 84, by a retaining pawl 98Jheld in engagement with the ratchet wheel by a spring 100. The arm 68 is adjustably:connected with the ratchet wheel so that it may be positioned toengage the lever 66 after-the crankshaft has made any desired number of revolutions. As shown, the arm 68 is formed on asleeve 102 mounted on the end of the stud 72, and provided with a pin 105i adapted to en.- gage any one of a series of holes 106 formed in the ratchet wheel. The arm is forced toward the ratchet wheelhy a spring 108 which will yield, to allow the arm and sleeve 102 to be drawn away from the v ratchet wheel and to be turned into position "to enfgagethepin1'04 with any desired hole 106.

sleeve 102 may he provided settle 110 arranged to cooperate'with a pointer 112 o the ratchet wheel in 'ihdieatihg the adjustment of the sleeve; l

e shown, the arm i s'so ad jitte'd'hn the timing ratchet wheelfthatftlieimoldjwi' main-in sole Tpressi i g position d rihg revolution of .the orank shaft, Ajsfsium with the Stop lu raih'eh ga'gmeht in "the 40, as aloove described, so gthat diiringithe next revolution of rthe orank'it fWill'he'.

connected from the toggle. During thelne'xt revolntioi ofithe, crahk, the "ratchet wheel 70 will be advanced lone tooth from the 'positiqn indicatedin'the ,d rawihggaiid as thje crank and link SeCtionZO a-gain come intothe "p0;

,sition indicated in the drawings, the arin1'68 will actilate the leve'r66 andj'thus rock the rock shaft 60in a directioh hrealrthe'a m su porting toggle'links 14 s aha 59' an sjwi g the latch controllingfcam 40 out 16f active position; This will. lease the latch lever 28, s t t m y f wl g d wn and. engage th pins 32, thus c'onnectingfthe crank with the toggle links 10am '12. pa ng the next revoliition of the crank, therefore, the molds will he movedinto the position of, presentation, and returned to sole p essing position 'wheh'the crank willjbe again disconnected fromthe toggle asfb'elforee when the 'levi 66fispperated by the arm as. as a v d rib d? *pin 1 t oi e infs from the lever lifts the retaining pawl 93, sh that the eminent-Chet hen a a rm, as rjetufnto'initi'al ptisit'i on or or that the latch controlling canifw' mayfreinain in inactive position when the ratchet wheelie t u r t rne nd e as sth rqe i shaf meansisfprovided for retaining the lever .66 and rocksfhaft 60 in the p'o'sition 'to which they'hr :Inoved'bythefaijfi1168, l ntil thelcr'ank has "dei e the at e r am? f b e controlling :0. 5 I As s'hown', this. means comprises ahoriz 'on tal lever 116, the front lbs end of which caf fisfa block 118 arranged V to engagethe upper end of thelev'er 66 and 1'20 latch it in position. Tr-he ltitch blockl18 normally rides [against the side of the. ilevi 66, and the block cart-lying leverll6jis forced in adirect ion 'to move thehlook in hehinjd the, ppe jl Of t e le r-by a pring 1 The latch lever 116jil op rat d to releashth lever 66, and to allow thelatch 'control cam ,lQht'o return to normal active position y sl'de 122, one ,end of ,vvhichis arranged to engage the rear "end ofthe lever 1l6, and The the other end of which is arranged to be engaged by a cam plate 124 on the toggle link 10. The slide 122 is forced forward by a spring 126, and its forward position is determined by a stop lug 128 arranged to engage the rear edge of the plate 130 which re tains the slide in its guideway. The forward end of the slide 122 is provided with inclines 132 and 134 arranged to be engaged by the cam 124 and an incline 136 on the rear side of the toggle link 10. During the straightening of the toggle links 10 and 12, the incline 136 acts against the incline 132 and forces the slide 122 back so that the toggle link may pass idly by the end of the slide. As the toggle link comes into position against the stop screw 44, the slide 122 snaps forward into the position indicated in Fig. 9, so that the latch lever 116 is free to engage and retain the lever 66 as above described. WVhen the toggle link 10 is reconnected to the crank, and is actuated to withdraw the molds from sole pressing position, the cam 124 forces back the slide 122, thus disengaging the latch lever 116 from the lever 66, so that the controlling cam 40 is returned to normal active position, ready to disconnect the crank from the toggle links 10 and 12 when the molds are returned to sole pressing position.

By proper adjustment of the timing arm 68 on the ratchet wheel 70, the molds may be caused to remain in sole pressing position during any desired number of cycles of the actuating crank shaft. While it will usually be desirable to similarly adjust the timing mechanism for each set of molds, so that the dwell of each set in sole pressing position will be the same, the timing mechanisms may if desired be adjusted so that one set of molds will dwell for a longer period than the other. Whatever the adjustment of the timing mechanisms, the molds will be moved from sole pressing position to a position of presentation, and returned to sole pressing position, during a single revolution of the crank shaft.

The crank shaft 18 may be driven through the proper gearing from a driving shaft 138, and the driving clutch may be controlled by a treadle 140 through starting and stopping mechanism similar to that illustrated and described in Patent No. 1,084,526, January 13, 1914. This controlling mechanism may be adjusted so that the crank shaft will rotate continuously so long as the operator keeps his foot on the treadle, or so that the crank shaft will be automatically stopped whenever one of the molds is brought to a position of presentation. In the latter case the clutch is held in engagement by a latch arm 141, the end of which carries a roll 142 adapted to engage the'end of a sleeve 144 on the clutch shipping rod 146 when the rod is moved forward by the depression of the treadle to engage the clutch. The latch arm 141 is connected to a sleeve 148 which carries two arms, one of which is indicated at 150. The upper end of each arm 150 is provided with a contact piece 152 arranged to be engaged by the end of the corresponding rod 20 when the link 22 is drawn back by the crank 16 in bringing the corresponding lower mold into a position of presentation. If the machine is to run continuously while the operator holds down the treadle, the sleeve 144 is adjusted on the rod 146 so that it remains under the roll 142 when the treadle is depressed. There is no lost time, due to the dwell of the molds in sole pressing position, in running the machine in either manner, since the mold which is moved into a position of presentation need remain in such position only long enough for the operator to remove the molded sole and place a new sole blank on the mold.

hile it is preferred to employ the specific construction and arran ement of parts shown and described in embodying the invention in a twin sole molding machine, it will be understood that this construction and arrangement is not essential to the broader features of the invention, and may be varied or modified as found desirable or best suited to the construction of the machine in which the invention is to be embodied. It will also be understood that certain features of the invention are not confined in their application to twin machines, but may be embodied with advantage in other types of sole pressing machines.

Having explained the nature and Object of the invention, and specifically described one form of machine in which it may be embodied, what is claimed is 1. A sole pressing machine, having, in combination, sole pressing molds, actuating mechanism and connections between the actuating mechanism and molds for relatively moving the molds into positions of pressure and presentation, means for dis connecting the connections only when the molds are in a position of pressure, and a timing mechanism for controlling the reconnection of the actuating mechanism.

2. A sole pressing machine, having, in combination, sole pressing molds, actuating mechanism and connections for relatively moving the molds from a position of pressure to a position of presentation and back to a position of pressure during a cycle of the actuating mechanism, and means for disconnecting the actuating mechanism to leave the molds in sole pressing positions for a predetermined number of cycles of the actuating mechanism and for connecting it for a single cycle.

,3. A sole pressing machine, having, in combination, two sets of molds, actuating mechanism therefor, mechanism for independently disconnecting each set of molds from the actuating mechanism when in a position of pressure, and mechanism for controlling the reconnection of the disconnected molds and actuating mechanism.

4. A sole pressing machine, having, in combination, two sets of sole pressing molds, actuating mechanism and connections for moving each set of molds into positions of pressure and presentation, means for independently disconnecting the actuating mechanism from each set of molds only when that set is in a position of pressure, and mechanism for controlling the reconnection of the actuating mechanism with each set of molds.

5. A sole pressing machine, having, in combination, sole pressing molds, an actuator moving to and from pressure-producing position and connections for relatively moving the molds to produce pressure and clearance, and mechanism for disconnecting the actuator when in pressure producing position and for reconnecting it upon a subsequent return to this position.

6. A sole pressing machine, having, in

combination, two sets of sole pressing molds, reversely arranged actuators moving to and from pressure producing position and con nections for relatively moving the molds of each set to produce pressure and clearance, and mechanism for disconnecting each actuator from the corresponding molds when in pressure producing position and for reconnecting it with the molds upon a subsequent return to this position.

7. A sole pressing machine, having, in combination, sole pressing molds, an actu ator moving to and from pressure producing position and connections for relatively moving the molds to produce pressure and clearance, mechanism for disconnecting the actuator when in pressure producing posi tion, and a timing mechanism for reconnecting the actuator upon a subsequent return to pressure producing position adjustable to vary the idle cycles of the actuator.

8. A sole pressing machine, having, in combination, sole pressing molds, a toggle for relatively moving the molds to produce pressure and clearance, an actuator moving to and from pressure producing position and connections for operating the toggle, mechanism for breaking the connections when the toggle is in pressure producing position and mechanism for timing the res toration of the connections.

9. A sole pressing machine, having, in combination, sole pressing molds, a toggle for relatively moving the molds to produce pressure and. clearance, a crank, a sectional link connecting the crank and toggle, means for disconnecting the link sections when the toggle is in pressure producing position, and mechanism for timing the reconnection of the link sections.

10. A sole pressing machine, having, in combination, sole pressing molds, a crank and connections between the crank and molds for relatively moving the molds to produce pressure and clearance, mechanism 7 for breaking the connections when the crank is in pressure producing position, and mechanism for timing the restoration of the connections.

11. A sole pressing machine, having, in combination, sole pressing molds, actuating mechanism and connections for relatively moving the molds to produce pressure and clearance, mechanism for disconnecting the actuating mechanism when in pressure producing position, a timing ratchet wheel, an actuating pawl operated in time with the actuating mechanism, an arm adjustably connected with the ratchet wheel, and devices operated by the arm for controlling the disconnecting mechanism.

12. A sole pressing machine, having, in combination, sole pressing molds, an actuator moving to and from pressure producing position and connections for relatively moving the molds to produce pressure and clearance including a latch, mechanism for connecting and disconnecting the latch as the actuator moves into pressure producing position, and a timing mechanism for controlling the re-connection of the latch.

13. A sole pressing machine, having, in combination, sole pressing molds, an actuator and connections for relatively moving the molds to produce pressure and clearance including a latch for connecting and discon necting the actuator and molds, a controlling cam for disengaging the latch as the actuator moves into pressure producing position, timing mechanism for rendering the controller cam inoperative, and connections for rendering the cam again operative after the actuator has moved the latch away.

14. A sole pressing machine having, in combination, two sets of sole pressing molds, a toggle for each set of molds, actuating mechanism for operating the toggles, mechanism for disconnecting each toggle from the actuating mechanism when the toggle is in pressure producing position, and mechanism for timin the reconnection of the disconnected toggl.

WILLIAM C. STEWART.

Witnesses:

ERIC A. HQLMGREN, FRANK W. Dr. TOUR.-

Copies of this patent may be obtained for five cents each, by addressing the "Commissioner of ratentl, Washington, D. 0