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:
Feb. 21, 1989
Filed:
May. 07, 1987
Applicant:
Inventors:
Carlo Bianco, Pescara, IT;
Pietro Susi, Pescara, IT;
Assignee:
Fameccanica S.p.A., Sambuceto, IT;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B26F / ; B26F / ; B29C / ;
U.S. Cl.
CPC ...
264-504 ; 264154 ; 264322 ; 425290 ; 425294 ; 425D / ; 425503 ;
Abstract
A softened unperforated film and a perforated die which is generally cylindrical in movement are brought into contact and exposed, in a predetermined region, to a pressure gradient oriented radially of the die. The pressure gradient causes the local penetration of the film into the holes of the die and the consequent perforation of the film itself. The movement of the die is supported in a rigid manner solely upstream and downstream of the predetermined region in the common direction of movement of the film and the die. The die itself is subjected to a pulling action, along its generatrices at least close to the predetermined region.