US592684A - Henry p - Google Patents

Description

(No Model.)

H. F. BEOHMAN.

PRINTING PRESS.

WITNESSES .zlllorn ey;

NITED STATES -ATENT Prion.

HENRY F. BEOHMAN, OF BATTLE CREEK, MICHIGAN, ASSIGNOR TO THE DUPLEX PRINTING PRESS COMPANY, OF SAME PLACE.

PRINTING-PRESS,

SPECIFICATION forming part of Letters Patent N 0. 592,684, dated October 26, 1897.

,1 Application filed April 9,1896. Renewed Apri122, 1897. Serial No. 688,375. (No model-l To all whom it flea/y concern:

Be it known that I, HENRY F. BECHMAN,

of Battle Creek, in the county of Calhoun and State of Michigan, have invented certain new and useful Improvements in Printing- Pre'sses; and I do hereby declarethat the following is a full, clear, and exact description thereof, reference being had to the ac companying drawing, and t0 the letters of reference marked thereon, which forms part of this specification.

This invention is an improvement in printing-presses employing movable beds and'reciprocating cylinders.

The object of this invention is to shorten the travel or stroke of the cylinder in that class of flat-bed printing-presses in which reciprocating cylinders are employed, andthus reduce the necessary length of the machine and increase its speed. I believe the nonsynchronous reciprocations of bed and cylinder secured by my invention and the results thereby obtained are entirely novel.

This invention is particularly useful as applied to fiat-bed Web-presses such as is described in the patent to J. L. Cox, No. 478,503, dated July 5, 1892, inasmuch as the serious complications which arise in synchronously reciprocating the beds and cylinders in such presses are avoided by my in-. vention. I do not wish 'to be understood, however, as limiting the application of' my invention to such machines.

My movable bed makes two full reciprocations for each reciprocation .of the cylinder, this relative movement being wholly novel and producing novel and useful results.

In the accompanying drawing I have illustrated a detail vertical longitudinal section through a portion of a printing-press sufficient to impart, in. connection with the following description, a clear understanding of my invention.

I do not, however, consider my invention limited to the particular form of press indicated in drawing, as it is applicable to web or sheet presses, either single or perfecting.

Referring to said drawing, A is a longitudinally-movable type bed suitably mounted in any of the well-known ways on the side frames S. This bed may be reciprocated by a connecting-rod B, having a yoke b, surrounding the main shaft M, and afriction-roller b,

engaging a cam-groove c in a cam-disk O, aflixed to shaft M, as shown.

D is the impression-cylinder, which, with inking-rollers d d, is suitably journaled in a reciprocating carriage E of any suitable construction, mounted in any wellknown mannor on the main frames S and reciprocated by means of a pitman F, attached to wristpin j on the main driving or crank wheels G.

The dotted lines 2 2 show the positions of the ends of the bed when the cam has shifted it to position ready for contact of impressioncylinder with the type-form. I

The operation is as follows: The parts being in the position shown in full lines let the main driving-wheel G begin a revolution in the direction indicated by the arrow. The bed, driven by the cam, will be moved toward the impression-cylinder, which will simultaneously begin to move toward the bed. The cam is so formed as to cause the bed to advance from line 1 until its ends coincide,

' movements are so timed by properly shaping the cams as to cause the reciprocations of the bed to occur in the intervals between successive impressions. Uniform rate of motion of bed and periphery'of cylinder may be secured by racks and gears on bed and ends of cylinder in the usual manner.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent thereon, is V 1. In a printing-press the combination of a locomotive-cylinder and a movable typebed with mechanism whereby the bed is twice reciprocated during each reciprocation I of the cylinder in a plane parallel with the 4. In a printing-press the combination of a loeomotivecylinder and a movable typebed; with mechanism whereby the bed is twice reciprocated during each reciprocation of the cylinder and while the cylinder is not in contact with the type-forms, substantially as described.

In testimony that I claim the foregoing as my own I ailix my signature in presence of. two witnesses.

HENRY F. BECIIMAN. Witnesses:

I. L. STONE, FRANK W. DUNNING.

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