Riso Kagaku Corporation

Mitsuru Ujiie

Yasuo Yamamoto

Nagon Takita

Hirohide Hashimoto

Hideki Terasawa

Gen Totsuka

Hiroyo Kikuchi

Takayuki Kurosaki

Provided is a heat-sensitive stencil sheet comprising an ink-impermeable thermoplastic film and a porous substrate laminated to the film, characterized in that the porous substrate is a screen gauze which is made of synthetic fibers having a fiber diameter of 25-60 .mu.m and has a mesh number of 160-190 or 210-290. The screen gauze may be subjected to calendering.

Heat sensitive stencil sheet

The present invention provides a stencil sheet roll formed by winding up a stencil sheet to form a roll, the sheet including a thermoplastic resin film and a porous support laminated thereto, wherein the compression elastic modulus of the sheet is not less than 32 kg/cm.sup.2. The invention also provides a stencil sheet roll formed by winding up a stencil sheet to form a roll, the sheet including a thermoplastic resin film and a porous support laminated thereto and having been subjected to calender treatment. Also disclosed is a method for manufacturing a stencil sheet roll comprising laminating a thermoplastic resin film to a porous support to form a stencil sheet, subjecting the stencil sheet to calender treatment, and winding up the calender-treated stencil sheet to form a roll. According to the present invention, excellent printing images can be obtained since compression elastic modulus of a stencil sheet is enhanced without impeding permeability of ink and thus deterioration in quality of images due to reduction in surface smoothness of the stencil sheet can be effectively prevented.

Stencil sheet roll and a method for preparing the same

A mimeographic transfer printing machine includes a stencil support drum for supporting a stencil, an ink supply device for forcing ink through the stencil supported on the stencil support drum, an ink receiving transfer drum to which the ink forced out from the stencil is to be transferred, and a sheet support device for supporting a printing sheet to which the ink on the ink receiving transfer drum is to be transferred. The stencil support drum has a slightly larger diameter than the transfer drum so that the circumferential speed of the stencil support drum is greater than that of the transfer drum to provide to the stencil a tension acting in a direction opposite to the rotation of the stencil support drum.

Mimeographic transfer printing machine

A heat-sensitive stencil master sheet having good perforation properties, having prevented reduction in the resolution and setting-off of ink to the surface of printed matters and affording a good printed image is provided,

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Ibaraki-ken, Japan

Mitsuru Ujiie