ROBERT F SHEEHAN
Engineering in Granby, MA
License number
Massachusetts 22454
Issued Date
Jan 24, 1969
Expiration Date
Jun 30, 2014
Type
Mechanical Engineer
Address
Address
Granby, MA 01033
Professional information
Loose Leaf Binder
US Patent:
4214839, Jul 29, 1980
Filed:
Nov 6, 1978
Appl. No.:
5/958024
Inventors:
Robert F. Sheehan - Granby MA
Raymond T. Cassidy - Ashfield MA
Raymond T. Cassidy - Ashfield MA
Assignee:
National Blank Book Company, Inc. - Holyoke MA
International Classification:
B42F 304
US Classification:
402 31
Abstract:
Loose leaf binder composed of an arcuate back panel, pivotable cover panels and a toggle ring mechanism which is affixed to the inner concave surface of the back panel. The toggle mechanism includes spaced leaf ring members each composed of a pair of mating sections pivotable with the toggle mechanism between open and closed positions. Each ring member is defined by rectilinear leg portions extending outwardly of the toggle mechanism, upwardly and inwardly extending arm portions and transversely extending arcuate rail portions supported by the arm portions of the ring in spaced relation to the arcuate back panel. Each of the arm portions has a unidirectional slope and with a corner of generous radius fairs together with each rail portion, enabling the loose leaf sheets held on the rings to be smoothly swung from one side to the other of the binder.