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. 01, 1991
Filed:
Nov. 05, 1990
Stuart J Wyman, St. Paul, MN (US);
Minnesota Mining and Manufacturing Company, St. Paul, MN (US);
Abstract
An opaque cartridge for storing and dispensing light sensitive web materials from a roll includes a box defining a right angular sexahedron and made up of a top section and a bottom section hingedly connected to each other at an upper rear edge of the box and providing a straight light-tight exit slot at a lower front edge of the box, and a spool consisting of a cylindrical hub on which the web material is wound and a pair of discoid end flanges concentric with the hub. The hub is rotatably mounted in openings provided in split end walls of the box. Light blocking and trapping flanges, baffles, plates, ledges, bars, recesses, and light steps are provided in conjunction with the hinge connection between the top and bottom box sections, the mating connections between the top and bottom end walls, and along the edge of the box providing the exit slot to the end that no light can enter the chamber provided by the box and spool of the cartridge.