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:
Jul. 02, 1991
Filed:
Mar. 15, 1990
Robert C Amrich, Glastonbury, CT (US);
Vytautas K Beleckis, E. Longmeadow, MA (US);
Dennison Manufacturing Company, Framingham, MA (US);
Abstract
An economical lightweight looseleaf binder combines the functionality of a standard ring binder with easy-to-use characteristics of report covers. The cover is folded to define front and back panels as well as a spine portion, and additionally includes a crease at the longitudinal center line of the two ring assemblies which are both secured to the back panel. The ring assemblies include a series of hooks having complementary notched profiles which firmly engage one another when closed, yet may be easily disengaged through flexure of the cover. In one construction, the binder comprises a pressboard cover to which is attached a pair of plastic ring assemblies. The hooks are configured to permit filler sheets to lie flat and to facilitate transfer of sheets from one side to the other.