Paper cutting machine
OwnerJames C. Dingusinventor
Life of this patent
Estimating the term…
Abstract
A paper film trimming machine, useful for trimming news copy, consists of a supporting table over which the paper is fed under the weight of a plexiglass plate by means of feed rollers driven by an electric motor. A pair of spring-biased straight-edge knives cut the paper as it travels across a cutting block located between the table and the drive rollers. Each of the knives is mounted on a single threaded shaft and their positions are each independently laterally adjustable to align them accurately with the columns that are being cut.
Claims28
For use in trimming copy reproduced on a paper, said copy consisting of printed material arranged in elongated columns, the combination comprising:
- a frame having spaced side support means;
- a forward paper support table mounted between said side support means;
- paper driving means mounted aft of said forward table;
- a paper cutting block between said forward table and said paper driving means;
- first and second knives, each having a sharpened straight cutting edge terminating at a point, said straight edges being biased against said cutting block at a slight angle thereto, the straight cutting edges of said knives being parallel to the direction of travel of said film;
- adjusting means for independently adjusting the lateral positions of each of said knives to align said knives with the edges of said columns;
- and
- said paper driving means comprising a drive roller, a forward idler roller and a rear idler roller, all of said rollers being supported between said side supporting means with their axes parallel, said idler rollers resting on said drive roller, the plane of said cutting block being substantially tangent to all of said rollers, whereby said paper is wrapped around said idler rollers and at least 180.degree. of said drive roller.
For use in trimming copy reproduced on a paper, said copy consisting of printed material arranged in elongated columns, the combination comprising:
- a frame having spaced side support means;
- a forward paper support table mounted between said side support means;
- paper driving means mounted aft of said forward table;
- a paper cutting block between said forward table and said paper driving means;
- first and second knives, each having a sharpened straight cutting edge terminating at a point, said straight edges being biased against said cutting block at a slight angle thereto, the straight cutting edges of said knives being parallel to the direction of travel of said film, said knives being releasably secured within knife holders, said knife holders being pivotally mounted above said paper-cutting block;
- adjusting means for independently adjusting the lateral positions of each of said knives to align said knives with the edges of said columns;
- a cam comprising a cylindrical shaft mounted between said walls adjacent said knife holders, said shaft being rotatably mounted on an axis eccentric to the axis of said cylinder;
- and
- a cam follower connected between each of said knife holders and said cam for positively moving said knives into and out of engagement of said cutting block when said cam is rotated, each of said cam follower comprising a forked spring secured to a knife holder, said spring having two tines, one contacting the upper surface of said cam, the other contacting the lower surface of said cam.
Dependencies are inferred from the claim text.