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Title:
FORMING OF ROUND CORNER OF BOX
Document Type and Number:
Japanese Patent JP54103481
Kind Code:
A
Abstract:

PURPOSE: To form the round corner of a box, in high productivity, by cutting a groove to the reverse side of a PVC-laminated plywood in such a shape as to form a cylindrical form when the plywood is bent at the part of the groove, applying a flexible tape across the groove, bending the plywood, and filling the cylindrical groove with a foamable resin.

CONSTITUTION: A PVC-laminated plywood composed of a PVC sheet 6 and a plywood board 7 is provided with a groove 8 having a shape to form a cylindrical shape when the board 7 is bent to a desired angle. A flexible tape 14 is bonded to the board 7 across the groove 8. The board 7 is bent at the groove 8 to the right angle, and a foamable resin is poured into the space 15 formed with the tape 14, the PVC sheet 6 and the board 7 to form the desired round-cornered box.


Inventors:
Aikawa, Noboru
Application Number:
JP1978000010320
Publication Date:
August 14, 1979
Filing Date:
February 01, 1978
Export Citation:
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Assignee:
MATSUSHITA ELECTRIC IND CO LTD
International Classes:
B29C53/00; B27H1/00; B29C37/00; B29C45/00; B29C51/00; B29C53/04; B29C53/06; B29C53/80; B29C53/00; B27H1/00; B29C37/00; B29C45/00; B29C51/00; (IPC1-7): B29C17/02