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AssigneeRiso Kagaku Corporation
InventorsJun Nakamura, Kenji Ohshima
Estimating the term…
A stencil is made by thermally forming perforations arranged in both a main scanning direction and a sub-scanning direction in a thermoplastic resin film of heat-sensitive stencil material by the use of a heat source which is heated through supply of energy. Supply of energy to the heat source is cut when a time interval not shorter than 50% and not longer than 100% of an estimated perforating time lapses from the time at which supply of energy to the heat source is started. The estimated perforating time is a time interval expected to be necessary for a perforation to be produced by the heat of the heat source and to be enlarged to a desired size as a final size as measured from the time at which supply of energy to the heat source is started.
A thermoplastic resin film for stencil material which is heated by a heat source through supply of energy and is thermally formed with perforations therein,
A heat-sensitive stencil material which comprises a thermoplastic resin film and a porous support sheet laminated together and is heated by a heat source through supply of energy, to be thermally formed with perforations,
Dependencies are inferred from the claim text.