Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Seiko Epson Corp
Suwa Seikosha KK
Original Assignee
Seiko Epson Corp
Suwa Seikosha KK
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Seiko Epson Corp, Suwa Seikosha KKfiledCriticalSeiko Epson Corp
Priority to JP15422475ApriorityCriticalpatent/JPS5277800A/en
Publication of JPS5277800ApublicationCriticalpatent/JPS5277800A/en
Perforating, Stamping-Out Or Severing By Means Other Than Cutting
(AREA)
Abstract
PURPOSE: To make possible the long-term maintenance of shearing characteristics by forming a punch unit through forming of a covering layer of punches, dies, etc. in an atmosphere containing active gas by a reactive ion plating method.
COPYRIGHT: (C)1977,JPO&Japio
JP15422475A1975-12-241975-12-24Production of paper punch unit
PendingJPS5277800A
(en)