US1002934A

US1002934A - Feeding mechanism for presses.

Info

Publication number: US1002934A
Application number: US52204609A
Authority: US
Inventors: Nathan Sebba
Original assignee: SAMUEL J RICHMAN
Current assignee: SAMUEL J RICHMAN
Priority date: 1909-10-11
Filing date: 1909-10-11
Publication date: 1911-09-12
Anticipated expiration: 1928-09-12

Description

N. SEBBA.

FEEDING MECHANISM FOR PRESSBS.

APPLICATION FILED 00111, 1909.

Patented Sept. 12, 1911.

2 SHEETS-SHEET 1.

N. SEBBA. FEEDING MECHANISM FOR PRESSES. APPLIOATION FILED 001.11.1909.

1,002,934. 1 Patented Sept. 12,1911.

CDLUMBI PIJNOCIRAP cm. WASHINGTON, D. C.

UNITED STATES PATENT OFFICE.

NATHAN SEBBA, OF CHICAGO, ILLINOIS, ASSIGNOR OF ONE-HALF TO SAMUEL J. RICI-IMAN, CHICAGO, ILLINOIS.

FEEDING MECHANISM FOR IRESSES.

1.,OO2,934E.

Specification of Letters Patent.

Application filed October 11, 1909.

Patented Sept. 12, 1911.

Serial No. 522,046.

To all whom it may concern:

Be it known that I, NATHAN SEBBA, a subject of the Emperor of Germany, and a resident of Chicago, county of Cook, State of Illinois, have invented certain new and use ful Improvements in Feeding Mechanism for Presses, of which the following is a specification,

The main objects of this invention are to provide improved mechanism for feeding sheets of stiff material to printing and cutting presses; and to provide improved means for adjusting the feeding mechanism to accommodate material of different widths.

A specific embodiment of this invention is illustrated in the accompanying drawings, in which Figure 1 is a side elevation of a press for printing and cutting sheets of cardboard and other stiff material. Fig. 2 is a front elevation of the same. Fig. 3 is a detail illustrating the method of mounting and adjusting the clamping rollers which force the sheet of material into driving engagement with the feed belts.

In the construction shown, the supporting frame 1 has mounted therein a horizontally disposed bed 2, adapted to support a suitable platen. Above the bed 2 are a plurality of vertically movable cross-heads 3 adapted to carry type forms, printing plates or cutting dies. The machine also comprises mechanism for causing said cross-heads to reciprocate vertically and feeding mechanism for advancing a sheet of material to said crossheads in succession.

The printing mechanism comprises a main driving shaft 4: journaled in the supporting frame 1 and carrying at one end a fly wheel 5 to which power is supplied by means of a belt, not shown. The shaft 4: carries at its other end a gear 6 meshing with gears 7 which are mounted on crank shafts 8 also journaled in the frame 1. The crank pins 9 are connected by means of links 10 to wrist pins on the cross-heads 3. Although the drawings show but two cross-heads 3, it will be seen that the train of gears may be eX- tended so as to operate any desired number of such crossheads. It will also be seen that either of the cross-heads may carry on its under side either a type holder, a printing plate or a cutting die. Thus, successive cross-heads may print different colors, and the final cross-head may cut the material to shape. The cutting dies may of course be earned by a cross-head which also prints one of the colors, as will be readily understood by those skilled in this art, without detailed description. The method of mounting the prlntlng plates, type or cutting dies upon the cross-heads is not a part of this invention, and is therefore not illustrated in i the drawings.

The inking mechanism is similar to that of the Gordon type of printing press, but is modified to suit the special requirements of the herein described press. The inking roller 11 is journaled at the ends of a pair of extensible arms 12, which arms are pivoted at 13 on the cross-heads 3. Guide rollers at the ends of the inking roller 11 run on tracks 14 as in the Gordon press, and guide said printing roller in its passage between the distributing disk 15 and the type surface. A spring 12 acting between the telescoping parts of each arm 12, yieldingly urges the printing roller against the surfaces with which it has contact. 12 is normally urged toward a certain lifted position by means of a spring 17 connected with a part 18 on the cross-head 3. Pins or shoulders 19 are located on the supporting frame in such position as to engage the arms 12 and cause the desired movement of the printing rollers through the vertical reciprocation of the cross-heads.

The feeding mechanism comprises a pair of parallel belts 20 carried by drums or wheels 21 at opposite ends of the platen bed 2. Each pair of drums 21 is fastened to one of the

shafts

22 or 23 so that the drums may be adjusted toward and away from each other. They are secured in position on the shafts 22 and'23 by set screws 24. The upper laps of the belts 20 extend along opposite sides of the platen bed and are adapted to support the edges of a sheet of stiff material such as cardboard, sheet metal, etc.

The material is fed to the belts at the end 100 which is at the left of Fig. 1, where its side edges are held in firm contact withthe belts 20 by means of idle rollers 25 carried by arms 26, which are pivoted at 27. A similar set of rollers 28 is similarly mounted at 105 rollers 29 of each pair are located respec- 110 Each arna movement.

tively above and below' the belt and are urged toward each other by means of a spring 30. The upper roller is carried by an arm 31 pivoted at 32 to the arm 33 which carries the lower roller 29. The arms 33 are mounted to slide in grooves in the supportingframe to permit thenrto be adjusted toward and away from the center line of the machine. The arms 33' are adapted to be clamped in any position of adjustment by means "of a set screw 34. The arms 31 are seated in grooves in the supporting frame, but are free to move vertically in scoping parts normally drawn together by a spring 42, but adapted to be yieldingly eX- tended when subjected to a pull suflicient to overcome the strength'of the spring 42. A wheel 43, rigidly mounted on the shaft 23, is'provided with an annular series of stop shoulders'44 formed by cuttingno'tches'in the rim of the wheel, and these shoulders coact with a detent pawl 45 which is pivotally mounted at 46 and provided with a long arm 47, the weight of which urges the -detent 45 against the rim of the wheel 43.

The lever 37 is shown in Fig. 2 in a position about midway between the limits of its The arm 47 is so located that when the lever 37 is at the lower limit of its movement, a shoulder 37 which is an eX- tension of the hub which supports the wristpin 38 will engage a hump. 48 on the arm 47,

and withdraw the detent 45 from engage ment with the stop shoulder 44. During the upward stroke of the lever 37 the wheel will be rotated in the direction of the arrow 49 on Fig. 2 until the detent pawl engages one of the shoulders 44 and stops further movement of the wheel 43;

The operation of the device shown .is as follows :-The fly wheel 5 is rotated by means of a suitable belt running on its periphery. This causes the cross-heads 3 to reciprocate in unison, and each upward movement of thecross-heads causes the ink to be applied to the type surfaces by means of the rollers 11. The inking rollers move out of the way as the cross-heads de'scen'd and receive a new charge of ink from the distributing disk 15 which may be rotated in the usual manner by mechanism not shown. Each rotation of the shafts 8 causes the cross-heads to perform one complete down and up stroke and, through the action 0f the link 41 and its connections, the pawl 36 is caused to rotate the shaft 23 and thereby advance the feed belts sufficiently to carry a sheet of material from position for registering with the printing surface of the first cross-head 3 to a position for registering with that of the second cross-head. The lever arm 37 is so proportioned with respect to the distance of the wrist pin 39 from the axis of its shaft 8 that the angular advance of the shaft 23 would be, if unobstructed, somewhat greater than the angular space between the stop shoulders 44. But the detent 45 engages the next succeeding shoulder 44, and thereby limits the rotation of the shaft 23 to the exact angular interval ,which is necessary for moving the sheet of material which is being printed on from one cross-head to the next. After engagement of the detent 45 with one of the stop shoulders 44, the continued movement of the wrist pin 39 is permitted through the yielding of the spring 42.

The sheet of material is fed in between the

rollers

25 and 21 at the left of Fig. 1, and as omitted, within the scope of the following claims, without departing from the spirit of this invention.

I claim: 1. In a press of the class described, the combination of a bed, a pair of parallel endless belts, each having its upper lap extending along said bed, drums supporting said belts, a shaft supporting the drum or drums at one end of said bed, pawl and ratchet mechanism for intermittently rotating said shaft, means for operating said pawl and ratchet mechanism and including a spring, a wheel carried by said shaft and having thereon an annular series of stop shoulders, a detent movably mounted and normally urged into position for engaging said sto shoulders, and means controlled by saiil operating means and adapted to retract said detent to permit the rotation of said shaft and to release said detent after said mechanism has started to rotate said shaft, said detent and stop shoulders being arranged to positively stop said shaft in certain predetermined angular positions, and said spring being adapted to yield. and permit the continued operation of said operat ing mechanism after said shaft has been stopped.

2. In a device of the class described, the combination of an endless feed belt, a drum supporting said belt, a ratchet wheel connected with said drum for rotating it, a

lever journaled concentrically of said ratchet wheel and having thereon a pawl adapted to engage said ratchet wheel and cause the intermittent rotation thereof through the oscillation of said lever, a stop wheel connected with said ratchet wheel and having an annular series of stop shoulders, a detent normally urged into position for engaging said stop shoulders, a shoulder movable with said lever, an arm controlling the movement of said detent and extending into the path of said shoulder, said arm and said last named shoulder being located so as to retract said detent when said lever is in a certain position, mechanism for oscillating said lever and comprising a spring adapted to yield and permit said mechanism to continue to operate after said detent has engaged a stop shoulder on said stop wheel.

3. Feeding mechanism for presses of the class described, comprising a supporting frame, a pair of endless belts, spaced apart in parallel relation to each other, drums sup porting said belts, said drums being adjustable toward and away from each other for adjusting the space between said belts, a series of pairs of opposed rollers arranged along each of said belts, arms pivotally connected together in pairs and rotatably supporting said rollers at their ends, and springs acting between said arms for urging said rollers into contact with said belts, said arms being slidably mounted on said frame to allow the adjustment of said rollers to correspond with the adjustment of said belts.

Signed at Chicago this 5th day of October NATHAN SEBBA. Witnesses:

SAMUEL J. RIOHMAN, EUGENE A. RUMMLER.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. C.