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.

Date of Patent:
Apr. 17, 1979

Filed:

Jul. 20, 1977
Applicant:
Inventor:

Norio Kazama, Yokohama, JP;

Assignee:
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B32B / ; B32B / ;
U.S. Cl.
CPC ...
428140 ; 156210 ; 2961 / ; 428137 ; 428138 ; 428182 ; 428186 ; 428178 ; 428212 ; 428332 ;
Abstract

A composite board structure comprising a corrugated fiberboard and a facing web which is attached to the outer face of a liner of the corrugated fiberboard by means of a layer of a hot melt adhesive material between the liner and the facing web, the liner being formed with perforations and the layer of the hot melt adhesive material having embossed spot portions respectively filling in the perforations in the liner. Such embossed spot portions are formed by building up a partial vacuum in the open spaces between the layer of the hot melt adhesive material and the corrugated paper medium forming part of the corrugated fiberboard.


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