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US 4,184,428 AGranted
Perforating-printing device for making and using thermal stencils
AssigneeRiso Kagaku Corporation
InventorTadamichi Hosoya
Life of this patent
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Abstract
A device which may be operated in a mode of thermally perforating thermal stencils, and another mode of producing printed copies by employing the perforated thermal stencils, wherein the thermal stencils are provided as a particular type of framed assembly for employing a relatively viscous printing ink, the device having a base plate, a cushion plate, and a press plate pivotally mounted to the base plate and having an aperture covered with a transparent rigid plate and a light source unit mounted at the aperture for emitting flash light to the aperture.
Claims18
A perforating-printing device using thermal stencils, comprising:
- a base plate having a cushion plate for placing originals or printing sheets thereon;
- a press plate, pivotally mounted to said base plate, having a transparent rigid flat plate located so as to face said cushion plate when said press plate is pivoted down against said base plate to permit light access during cutting of said stencil and viewing during printing;
- means supported by said press plate for holding a framed thermal stencil at said press plate against said rigid plate so that, when said press plate is pivoted down against said base plate, said transparent rigid plate exerts substantially uniform pressure on said stencil over substantially its entire surface;
- and
- a light source unit removably mounted to said press plate as opposing said transparent rigid plate so as to be able to radiate flash light to said thermal stencil.
2 more elements
Dependencies are inferred from the claim text.