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:
Oct. 18, 1994
Filed:
Jan. 27, 1992
Applicant:
Inventor:
Daniel D Kewin, Brantford, Ontario, CA;
Assignee:
Other;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B65H / ;
U.S. Cl.
CPC ...
2426104 ; 2426135 ;
Abstract
A tubular core assembly for a roll of paper or other sheet material has a hollow cylindrical core member formed by multiple wraps of paperboard material. An annular collar is located within each opposite end portion of the core member, each collar being a rigid body of non-isotropic material and having an outer annular surface secured to the inner annular surface of the core member and an inner annular surface shaped to receive a roll supporting chuck. The ratio of collar wall thickness to core member wall thickness is in the range of from about 1.3:1 to about 2:1.