Typewriting machines – Sheet or web – Including feed of tally strip record-medium
Reexamination Certificate
2000-01-28
2001-10-16
Hilten, John S. (Department: 2854)
Typewriting machines
Sheet or web
Including feed of tally strip record-medium
C400S621000, C083S614000
Reexamination Certificate
active
06302602
ABSTRACT:
TECHNICAL FIELD
The present invention relates to a recording medium cutting device which cuts a recording medium in a cross direction during delivery thereof in an image formation apparatus for forming an image on a recording medium like recording paper.
BACKGROUND TECHNIQUE
For an output device for computers and work stations, there are known ink-jet type image formation devices which form an image by ejecting ink onto a recording medium such as recording paper, and electrophotography type image formation devices which form an image with toner. Some of the image formation apparatuses are provided with a recording medium cutting device for cutting the delivered recording medium in a cross direction (direction of breadth of the recording medium).
The recording medium cutting device has a cutter blade which cuts the delivered and stopped recording medium by moving in the breadth direction of the medium. The cutter blade, which may be in a knife shape or a disk shape, moves in a straight line to cut the recording medium. The cutter blade moves in contact perpendicularly with the horizontally held recording medium.
In cutting of the recording medium as above, at the start of the cutting with the cutter blade by contact of the cutter blade with the edge of the recording medium, the edge of the recording medium can be distorted by resistance against the cutter blade. Such distortion of the edge of the recording medium can retard the penetration of the cutter blade into the recording medium to prevent straight cutting to make the cut edge wind. Such a phenomenon is more liable to occur with a knife type cutter blade than with a disk type cutter blade.
DISCLOSURE OF THE INVENTION
The present invention intends to provide a recording medium cutting device which is improved in the penetration ability of the cutter blade into a recording medium.
To achieve the above object, the recording medium cutting device of the present invention is equipped in a image formation apparatus for forming an image on a recording medium having delivered to an image formation region, and cuts the delivered recording medium, the recording medium cutting device comprising
(1) a cutter blade which cuts the delivered recording medium by moving in a direction crossing the delivery direction of the recording medium,
(2) with the side face of the cutter blade facing to the delivery direction, being set at an acute angle of not more than 90° to the recording medium.
In the present invention,
(3) the acute angle ranges preferably from 25° to 65°,
(4) the smaller angle ranges more preferably from 35° to 55°, and
(5) the smaller angle ranges still more preferably from 40° to 50°.
REFERENCES:
patent: 4922774 (1990-05-01), Oldeman
patent: 4984916 (1991-01-01), Sekine
patent: 5272947 (1993-12-01), Peters
patent: 5307716 (1994-05-01), Onishi
patent: 5882128 (1999-03-01), Hinojosa
patent: 5893310 (1999-04-01), Hirao et al.
patent: 181396/1987 (1987-11-01), None
patent: 124493/1988 (1988-08-01), None
Izuma Kensuke
Kawamura Iwao
Kiyohara Naoki
Nakamura Takashi
Namekata Kiyokazu
Copyer Co. Ltd.
Dellett and Walters
Hilten John S.
Williams Kevin D.
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