Heat-sealed die cut binder

Details Heat-sealed die cut binder Heat-sealed die cut binder

1989-05-24

1991-06-04

Bell, Paul A.

Books, strips, and leaves

Book, element thereof, or accessory therefor

Covers

156292, 281 36, 281 37, B42D 300, B42D 308

Patent

active

050208284

ABSTRACT:
A binder is provided having a cover featuring a three-dimensional design produced by depressing plastic cover sheets into an opening in an underlying cover panel. The cover sheets are heat sealed together around the perimeter of the cover panel and in the regional of the depression. A plurality of such openings may be provided, all so shaped and positioned as to avoid substantially impairing the structural integrity of the cover.

REFERENCES:
patent: 2088672 (1937-08-01), Steinthal
patent: 2364029 (1944-11-01), Ryan
patent: 2616823 (1952-11-01), Weymouth
patent: 2726941 (1955-12-01), Markus et al.
patent: 2801115 (1957-07-01), Federbush et al.
patent: 3572957 (1971-03-01), Strassberg
patent: 3758358 (1973-09-01), Kuroda
patent: 4164085 (1979-08-01), Steeb et al.
patent: 4315642 (1982-02-01), Errichiello
patent: 4630843 (1986-12-01), Willat

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