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:
Sep. 22, 1987
Filed:
Apr. 25, 1986
Dainippon Screen Mfg. Co., Ltd., Kyoto, JP;
Abstract
An apparatus for securing a sheet material under suction, the apparatus comprising: a face plate including a number of pores adapted to allow air to pass through, a base plate including outlet ports, corrugated plate interlocated between the face plate and the base plate, the corrugated plate including hill portions and valley portions alternately produced, each hill portion and valley portion taking the form of rectangles produced concentrically of the base plate, the corrugated plate further including inlet grooves between one hill portion and the next, and outlet grooves between one valley portion and the next, each outlet groove including one outlet port in the base plate, the inlet grooves and the outlet grooves being communicated with each other through a port produced in the partition wherein the port is located at a point distant from the outlet ports.