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:
May. 04, 1993
Filed:
Apr. 10, 1992
Ronald S Danhoff, Plymouth, OH (US);
R.R. Donnelley & Sons Company, Lisle, IL (US);
Abstract
A book according to the present invention has a front cover and a back cover joined by a spine. A plurality of pages are bound to each other and to the cover near the spine. All or nearly all of the pages have a lay flat hinge so that the book will lie flat when opened. The lay flat hinge comprises a weakened portion, a first non-weakened portion between the weakened portion and a head of a page, and a second non-weakened portion between the weakened portion and a foot of the page. The weakened portion allows the book to lie flat when opened and the first and second non-weakened portions prevent pages from being easily torn from the book and prevent the weakened portion from being visible along edges of the book.