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US 9,308,438 B2Granted
Jigsaw puzzle and manufacturing method thereof
AssigneeGateway Arch Inc.
InventorKatsuhisa Yoshida
Life of this patent
Estimating the term…
Abstract
To provide a jigsaw puzzle that is manufactured easily and conveniently in a short time and allows reduction in production costs, and a method of manufacturing the same. A jigsaw puzzle obtained by stamping out a laminated sheet of a plurality of synthetic resin sheets with a stamping blade to be divided into a plurality of small pieces, wherein the laminated sheet is formed of: a soft sheet of a soft synthetic resin having a sheet shape formed by extrusion molding; and a hard sheet of a synthetic resin that is harder than the soft sheet and is bonded to the soft sheet.
Claims4
A method of manufacturing a jigsaw puzzle,
- the method comprising:
- a first step (S1) of extruding a molten synthetic resin into a sheet shape by extrusion moulding to produce a soft sheet (102);
- a second step (S2) of bonding, to the soft sheet (102), a hard sheet (101, 103) of a synthetic resin that is harder than the soft sheet to form a laminated sheet (100);
- a third step (S3) of cutting the laminated sheet (100) to form a base sheet (110) having a certain size;
- and
- a fourth step (S4) of stamping out the base sheet (110) with a stamping blade to be formed into a plurality of small pieces, wherein
- the laminated sheet (100) in the second step is obtained by applying pressure to the soft sheet (102) in an uncured state before complete curing after the extrusion moulding and the hard sheet (101, 103) in order to bond the sheets together.
4 more elements
Dependencies are inferred from the claim text.