发明名称 |
Method of forming a surface protector with an expansible pocket |
摘要 |
A method of forming a selectively expansible pocket or bulge in a thin plastic sheet to facilitate the use of the sheet as a surface protector or shield includes the step of applying oppositely directed forces to the sheet in a plurality of intermeshed closely spaced lines about a predetermined area in which it is desired to form a pocket. The forces are applied until stretching, thinning, and permanent deformation of the sheet takes place along the lines to produce a plurality of permanent corrugations to permit lateral deflection of the predetermined area.
|
申请公布号 |
US4865791(A) |
申请公布日期 |
1989.09.12 |
申请号 |
US19880152999 |
申请日期 |
1988.02.03 |
申请人 |
THE EXCELLO SPECIALTY COMPANY |
发明人 |
FERRO, SALVATORE D.;ISAKSEN, ROBERT A.;STUPI, ROBERT J. |
分类号 |
B60J5/04;B29C51/08;B29C53/22;B29C53/24;B29C63/22;B29L9/00;B60J5/00;B60R13/08 |
主分类号 |
B60J5/04 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|