The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 17, 1999
Filed:
Oct. 30, 1997
Kouichi Uchiyama, Inashiki-gun, JP;
Riso Kagaku Corporation, Tokyo, JP;
Abstract
The disclosed stencil printing apparatus includes, a pressure chamber comprising a first place member on which a sheet to be printed is placed, an airtight elastic frame which is placed on the first plate to surround the sheet, and a second plate member which is placed on the elastic frame and supports a stencil opposite to the sheet; a resilient air chamber which is layered below the first plate member of the pressure chamber and communicates with the pressure chamber; and a check valve which allows air to be exhausted from the air chamber but inhibits the air chamber from sucking air from the apparatus outside. Stencil printing can be effected by placing a stencil printing ink on a stencil, disposing a stencil and a sheet to be printed in the pressure chamber, compressing the air chamber to exhaust air to the outside and then releasing the compression of the air chamber while the air chamber is kept sealed from the outside, so that the pressure chamber is depressurized so as to allow the pair of plate members to come close to each other and simultaneously bring the stencil into close contact with the sheet to transfer the ink to the sheet through the suction created as the air chamber restores its shape. The printing apparatus can quickly and readily depressurize the pressure chamber, is small-sized, lightweight and simplified as a whole, and is improved in operatability.