US954679A - Cutting-stick for printing-presses. - Google Patents

Description

S. KAUFMAN. CUTTING STICK FOE PRINTING PRBSSES. APPLIGATION mum JUNE 19. 1909.

Patented Apr. 12, 1910.

awbamto'c lmibmcooco $1 M attoznu K m SAMUEL KAUFMAN,

OF NEW YORK, N. Y.

CUTTING-STICK FOR PRINTING-PRESSES.

Application filed June 19, 1909.

lb all whom "it may concern:

Be it known that I, SAMunn KAUFMAN, a citizen of the United States, and. a resident of the borough of Brooklyn, county of Kings, city and State of New York, have-invented certain new and useful Improvements in Cutting Sticks for Printing- Presses, of which the following is a full, clear, and exact specification.

My invention relates particularly to cutting sticks havin a revoluble cutting block or surface, and 18 adapted for use in web printing presses such as are ordinarily used in printing newspapers, although it may be used in other types of machine. The cutting mechanism of such presses consists of a male cylinder carrying a knife and a female cylinder carrying a cutting stick arranged to co-act so as to sever the web into sheets of any required size as the paper is delivered from the press.

The cutting sticks at present in general use are made with a bed of wood upon which is nailed a flat strip of rubber to form the cutting surface. When the rubber becomes worn out from the action of the knife, the press must be stopped, the cutting stick removed from the cylinder and a new one re placed. These operations cause a considerable loss of time, which is particularly disadvantageous in newspa or work, for in Such work time is often 0 the essence.

My invention has for its principal object to provide a cutting stick of novel and simple construction, having a revoluble cutting surface which may be readily turned while the cutting stick is in its place on the cylinder so that when any art of its surface becomes worn out a free cutting surface may be presented to the knife, thereby permitting the use of one cutting block for a plurality of cuts. I attain this object, as well as others not herein enumerated, by means of the device illustrated in the accompanying drawings, in which- Figure 1 is a view in perspective of my cutting stick; Fig. 2 is a section in elevation through the center line of the stick; Fig. 3 is a cross section in elevation; and Fig. 4. 1s a detailed view of the detachable support.

The cuttin stick comprises a bed or frame (1) rovide with a longitudinal groove (2) whic is made semi-circular in cross sectlon to form a suitable housing for a cylindrical cutting block (3). The cutting block is revolubly. carried on a shaft (4) which is suit- Specification of Letters Patent.

Patented Apr. 12, 1910.

Serial No. 503,060.

ably journaled near its ends in a stationary bearing or support (5) and a detachable hearing or support (6) so as to permit of a longitudinal movement of the shaft. This cutting block is constructed of rubber or other suitable resilient material to provide a yielding surface upon which the cutting knife may act.

It is necessary to fasten the cutting block on to the shaft in such a manner that the block will not slip around the shaft. I pre fer to do this by making the portion of the shaft on which the cutting block is mounted polygonal in cross section, as shown in Fig. 3, although this may be accomplished in any other suitable manner. 4

The bearing or support is detachably fastened to the frame (1) in any suitable manner known to the art, as by means of the screws (7 By simply detaching this support from the frame the cutting block may be readily removed and a new one relaced, as when the surface of the cutting lock is entirely worn out.

To provide means for holding the cutting block securely in place so as to prevent further rotation thereof when the block has been turned into proper position, I provide a spring (8) which acts against the stationary support (5) and the adjacent end of the cutting block (3) to force the shoulder (9) of the shaft into the recess (10) formed on the inner surface of the detachable support. The engagement of the shoulder with the recess acts to lock the cutting block in position when it has been turned.

The manner in which my invention operates is as follows: When any part of the surface of the cutting block becomes worn, the shaft upon which the block is mounted is pressed inwardly so as to disengage the shoulder from the recess and is then partially turned so that the block presents a fresh cutting surface to the knife. The spring forces the shoulder back into the recess thereby lockin the shaft in place and permitting the cutting block to be used for urther cuts.

As the cutting block is sup orted on the shaft, the pressure of the kni e on the upper surface of the bloc will not be communicated to the lower surface thereof but will be taken u by the shaft thereby protecting the un er surface of the block, so that when the shaft is partially rotated to bring the under surface on top, the resilieney of said surface Will not have been destr ycd by the pressure from above.

What I claim as my il'ivention and dcsirc to secure by Letters Patent is:

l. A cuttin stick for printing presses comprising a frame, a shaft rcmovahly supported near its ends on said frame, and a cylimh'ival cutting hlock axially mounted on said shaft.

2. A cutting stick for .printing presses manprising a frame, a shaft mnuovalily sup au'tctl on said frame, a cylindrical cutting hlot-k axially mounted on the shaft, and adapted to be rotated by turning said shaft, and means for locking said shaft in position against the continued rotation thereof.

It. A cuttinq' stick for 'irinting p'resscs comprising a frame having a stationary sup" port and a detachable suppor a shaft johrnah-d in said supports and a evlirnlrical out ting hlock axially n'iounted on said shaft,

and adapted to he rotated by turnh'ig said shaft.

st. A cutting stick for printing presses comprisinga frame having a stationary sup port and a detaeliahle support, a shaft journaled in said supports, a cylindrical cutting block axially mounted on said shaft, and means for locking said shaft against con-- tinued rotation.

:3. A cutting stick for printing presses comprising a frame having a stationary support and a detachable support, a shaft journahal in said supports, a cylil'idrieal cutting hloch mounted on said shaft and means for locking the shaft comprising a recess formed in one of the supports and adapted to rcceive and engage a shoulder formed on said shaft so as to hold said shaft andthe cut ting block rotated thereby against: continued rotation.

In witness whereof I have hereunto signed my nanain tlw presence of two witnesses.

SAM U E] J K A UFM A N.

W'itnesses LESTER F. Drnrrmrronrnu, VVILLARI) SCHWARTZ.

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