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. 04, 1990
Filed:
Nov. 01, 1988
Applicant:
Inventor:
Oskar Karolyi, Bad Boll, DE;
Assignee:
Michael Horauf Maschinenfabrik GmbH & Co. KG, Donzdorf, DE;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B42C / ;
U.S. Cl.
CPC ...
412-3 ; 412-9 ; 412 23 ; 100207 ;
Abstract
In the manufacture of a book cover, a cover sheet is glued to cardboard panels and portions of the sheet are folded around edges of the panels. The glued unit is then passed through a press comprising pairs of press rolls spaced apart in the direction of travel of the glued unit. One roll of each pair contains circumferentially spaced recesses along its outer periphery. The recesses prevent the application of pressing forces to the unit when the recesses reach the unit, whereby an interrupted pressing action is achieved. Each pair of rolls is operated to apply pressing forces to regions of the cover not pressed by the other pair of rolls.