US 6,205,918 B1Granted

Stencil printer

AssigneeTohoku Ricoh Co., Ltd.

InventorsMituru Takahashi, Hideaki Matsuda

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Abstract

A stencil printer includes a plurality of ink drums spaced from each other in the direction of paper conveyance and each having a respective master wrapped therearound. An upstream ink drum and pressing means movable into and out of contact with the upstream ink drum define an upstream print position. A downstream ink drum and pressing means movable into and out of contact with the downstream ink drum define a downstream print position. An intermediate conveyor is located between the upstream print position and the downstream print position for conveying a paper carrying an image printed at the upstream print position toward the downstream print position. A distance which the paper moves from the upstream print position to the downstream print position is longer than a distance between the upstream print position and the downstream print position. Defective printing is reduced even when the peripheral speed of the upstream ink drum and that of the downstream ink drum are different from each other.

Claims18

Dependent claims

A stencil printer comprising:

a plurality of ink drums spaced from each other in a direction of paper conveyance, and each having a respective master wrapped therearound and fed with ink from ink feeding means to an inner periphery thereof;
a plurality of pressing devices each being configured to move toward and away from one of said plurality of ink drums;
and
an intermediate conveyor for conveying a paper on which an image is printed at an upstream print position where an upstream one of said plurality of ink drums in the direction of paper conveyance and one of said plurality of pressing devices associated with said upstream one nip said paper to a downstream print position where a downstream of said plurality of ink drums in said direction and the other of said plurality of pressing devices associated with said downstream one nip said paper, said intermediate conveyor being positioned between said upstream ink drum and said downstream ink drum,
wherein a paper conveyance distance which the paper moves while being conveyed from said upstream print position to said downstream print position is made sufficiently longer than a distance between said upstream print position and said downstream print position such that the paper is not pulled by said downstream ink drum while being printed at said upstream ink drum.

2 more elements

Dependencies are inferred from the claim text.