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:
Dec. 19, 1978
Filed:
Jun. 20, 1977
Gunter Heyden, Neuwied, DE;
Gunter Geitz, Neuwied, DE;
Winkler & Dunnebier Maschinenfabrik und Eisengiesserei GmbH & Co., KG, Neuwied am Rhein, DE;
Abstract
An improved cutting device of the type having rotary vane knives, which cerate with stationary knives, for making patterned cuts in the edges of paper webs, particularly for the preparation of envelopes or envelope blanks, is provided. The device includes at least one cooperating knife pair, comprising one rotary knife and one stationary knife, disposed for cooperative engagement for making patterned cuts in the edges of paper webs moving therepast. The blades are made of materials differing from one another in hardness to an extent such that the softer knife can have material removed from it without damage to the latter, and at least one of the knives of the cooperating knife pair, is mounted for feeding movement toward its associated cooperating knife, while the cutting device is operated.