US824889A - Printing-press. - Google Patents

Description

PAYTENTED JULY 3. 1906.,

0. B. SWINE. PRINTING PRESS.

APPLICATION FILED SEPT. 29, 1905 5.

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0.3. SWINK.

PRINTING PRESS.

APPLICATION FILED SEPT.29,1905.

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PATENTED JULY 3, 1906.

C. B. SWINK. PRINTING PRESS.

APPLIOATION FILED SEPT.29.1905.

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Attest:

- Inventor:

"PATENTED JULY 3; 1906.

C. B. SWINK. PRINTING PRESS.

APPLICATION FILED SEPT.29,1905.

4 SHEETS-SHEET 4.

UNITED STATES PATENT oFFIoE- CHARLES B. SWINK, OF MUSKOGEE, INDIAN'TERRITORY.

PRINTING-PRESS.

Specification of Letters Patent.

{ Patented July 3, 1906.

Application filed September 29, 1905. Serial No. 280,586-

ed is actuated by a crank-arm or its equiva-' lent. In such presses the movement of the reciprocating bed-plate is not uniform; butvaries from slows eed to high speed. Consequently when t e cylinder and bed-plate are in operative contact apprgximately two-thirds of the bed-plates movement in one direction the cylinder must ro-' tate with a varying speed, while during the balance of the movement in the first direction and the movement in the o posite direction,

when the cylinder and be -plate are not in operative cohtact, the cylinder may rotate at a uniformspeed. y

The object of the present invention is to provide im roved means'for lifting the impression-cy movement in one direction, and, furthermore, to provide improved means for driving the impression-cyhnder at a variings eed thent th it is in operative contactwi e ed-plate.

One object particularly in view is to. ermit .the gears which drive the cylinder to l? stantly in mesh,'so that there shall be no possibility of a harmful ,chan e of the relations between the cylinder and t e bed-plate.

The invention will be more fully explained hereinafter with reference to the accompanying dlrl'awings, in which it is illustrated, and

Figure 1 is a top plan view of a press which embodies the present improvements, parts being broken out and removed to show details. Fig. 2 is aview in longitudinal section on the plane indicated by the line 2 2 of Fig. 1. Fig. 3 is a artial view in section on the plane indicate by the line 3 3 of Fig. 1. Fig. 4 is a view in transverse section on the plane indicated by the line 4 4 of Fig. 1.

The frame a of the press is suitably constructed to support the reciprocating bede is likewise secure der from o erative contact with the reciprocating be -plate' during itse conplate band the other working parts. The present invention is not particularly concerned with the precise f0rmof mechanism for reciprocating the bed-plate; but, as shown in the drawings, the main shaft 0, having suitable driving-pulleys c and balance-wheel c, is provided with a gear (1, which engages a gear e upon a driving-shaft e. A crank-arm upon the shaft e and-is provided with a wrist-pin 0 which engages a vertical slotted arm or bracket. b, secured to the bed-plate 6, whereby as the shaft e is rotated the bed-plate is reciprocated. As the wrist-pin e passes the horizontal plane of its center offmotion the direction of movement of the-bed late is reversed and its speedis 1 slowest an at the intermediate oints its speed attains the maximum. So ar as the I present invention is concerned any other similar or suitable means might be employed 7 5 for reciprocating. the bed-plate, it being understood that'the' means presently to be described for. rotating the im ression-cylinder are devised with especial. re erence to a varyingspeed of movement of the bed-plate, such as would be produced by the means described;

The impression-cylinder) has its shaft f .mounted in vertically movable bearingblocks f guided in suitable ways'f. Com pre'ssion -springs fiflact normally to raisethe locks f and to theimpression-cylinder from the type'carried by the bed-plate The devices which control the lifting of the cylinder and bring it down upon the type at the proper time comprise the following instrumentalities, viz: a cam g, mounted on the crank-shaft e; arms-g, cooperating with the cam "and connected by a linkg so thatthey shall move together; a rack-bar g,which is pivotallyconnected to an extension of one 5 of the arms g, and a shaft h, having'a seg ment h, engaged by the rack-bar g and eccentrics h, which are engaged by links'h", the latter being pivotally connected to thevertically-moving blocks f The cam g is suit- 10o ably proportioned, as shown particularly in Fig. 3, and is suitably positioned with reference to the crank-arm 0, so that before-the bed-plate has finished its movement in one direction, as to the right in Fi 2, the shaft h v :o 5 is rotated to permit t e cylin er to rise upon the com ression-springs f, and after the. close of t e movement of the bed-plate in the opposite direction the cam operates to draw the blocksf downward against the pressure 1 10 'bearings in the press-frame.

tive contact with the bed-plate, as shown in Fig. 2, while at other times the cylinder is permitted to rotate at a uniform speed. To accomplish this result without permitting the gears which rotate the cylinder to become disengaged, there-is mounted upon the shaft e an irregular gear '01, a portion of its periphery, as shown, having a uniform radius, while another portion of its periphery has an increasing radius from the beginning to the 'middle of such portion and a decreasing radius' from the middle to the end of such portion. A complementary gear 7c engages con stantly with the gear i and is secured upon a shaft is, which is mounted for rotation in The shaft 7c also has secured thereto a gear m, which meshes with an idler n, (if an idler be used,) also mounted for rotation on a stud secured in the press-frame, and the idler engages a gear 0, fixed on the shaft f 'of the impressioncylinder The vertical movement of the gear 0 is slight and is sufficiently accommo datedby deeply-cut teeth on two of the gears, as m and n, so that the c linder f has the varyin speed of rotation urin'g its two-thirds revo ution, which is re uired by the varying speed of movement of the bed-plate with which it is then in contact, and has a regular speed during the remaining part and the next revolution, when the cylinder is out of contact with the bed-plate, and at the same time all ofthe gears'whichare involved in the rotation of the cylinder remain in'constant engagement.

The mode of operation of the improved press will be clearly understood without further explanation, and it will also be seen that the shifting of the cylinder from uniform speed of rotation to non-uniform speed of rotation is timed according to the time of the printing stroke and that while the cylinder is in contact with the bed-plate it rotates at a speed exactly corresponding to that of the bed plate. Furthermore, notwithstanding the vertical movement of the cylinder its driving-gears remain always in mesh and the cylinder retains always its proper relation to the bedplate. The cylinder-lift mechanism, as will be noted, is simple in construction and direct in operation andlends itself readily to the desired movements.

I claim as my invention 1. In a press, the combination of a reciprocating bedlate, a crank to drive the same whereby the ed-plate upon each reciprocation is gradually started, attains a maximum velocity and gradually stops, a cylinder, a train-of gears to drive the cylinder including a mated pair of irregular ears whereby the cylinder may be driven in armony with the b ed-plate during the printing operation, and means to impart mot on to said crank and to said train of gears.

2. In a press, the combination of a reciprocating bedlate, a crank to drive the same whereby the ed-plate upon each reciprocation is gradually started, attains a maximum velocity and gradually stops, a cylinder, a-

train of gears to drive the cylinder including a mated pair of irregular ears whereby the cylinder may be driven. in armony with the bed late during the printing operation,

,mova le bearings for the cylinder,- an eccentrio-shaft, links connecting the eccentrics thereon with said 'movable' bearin s, and means for rotating said eccentrlc-siaft in harmony with the reciprocation of the bed:

plate. I i

4. In a press, the combination'of' a reciprocating bedlate, a crank to drive the same whereby the ed-plate upon each reciprocation is gradually started, attains a maximum velocity and gradually stops, a cylinder, a train of gears-to drive the cylinder including a mated pair of irregular ears whereb thecylinder may be driven in armony wit the bed-plate during the printing operation, and also including gears with dee ly-cut teeth whereby said train of gears wil remain constantly in mesh, movable bearings for the cylinder, an eccentric-shaft, links connecting the eccentrics thereon with said movable bearings, a driving-shaft upon which said crank and one of the train of gears are mounted, a cam on said shaft, and means actuated by said cam for rotating the eccentrio-shaft in harmony with the movements of the bed-plate.

5. In a press, the combination of a cylinder, a bed late, a driving-shaft, means actuated there om to reciprocate the bed-plate at a varying speedfiand a train of gears constantly in mesh between the driving-shaft and the cylinder includin a mated pair of irregular gears whereby t e cylinder is ro-' constantly in mesh between the driving shaft and the cylinder, including a mated air of irregular gears whereby the cylinder 1s rotated at a varyin s eed in harmony with the movements 0% t e bed-plate, and means to separate the cylinder and the bedplate during reciprocation of the latter in one direction, substantially as described.

7 In a press, the combination of a cylinder, a bed-plate, a drivingshaft, means actuated by the driving-shaftv to reciprocate the bed-plate at a varying speed, a train of gears between the driving-shaft and thecyhnder including a mated pair of irregular gears, each of said irre lar gears having one portion of its perip ery of uniform radius and the other portion of its periphery of varying radius, and means to separate the cylinder a cam on said sha and the bed-plate While the uniform portionsv of said irregular gears are in engagement, substantially as described.

8. In a press, the combination of a cylinjder, a bed-plate, a drivin -shaft, means actuated by sa1d drivin -shatt to reciprocate the bed-plate at a varying speed, a train of gears between the driving-shaft and the cylinder including a mated. fpair of irregular gears, t, two arms connected together and devices controlled by said arms to separate the cylinder and bed-plate and to bring them again into operative contact, substantially as described.

This specification si lied and witnessed this 25th day'of Septem er, 1905.

CHARLES B. SWINK.

In presence of- NORMAN R. HASKELL, H. G; BAKER;

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