Patent · US Expired

Double-walled shaped plastic articles

US4188425A · kind A · utility

1Cited by

4References

5Claims

0Family size

Assignee

Rohm Co., Ltd. · JP

Inventors

Friedrich Hanstein · Groß-Zimmern, DE
Theodor P. Moench · Heubach, DE
Gunter Schreyer · Darmstadt, DE

Key dates

Filing date	Apr 14, 1978
Grant date	Feb 12, 1980
Priority date	—
Expiry date	Apr 14, 1998

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10T428/24653
WIPO fieldOther special machines
WIPO sectorMechanical engineering

Abstract

What is disclosed is a double-walled shaped plastic article comprising a first sheet of a synthetic resin having a geometrically regular depression therein, the depressed portions of which are connected to surrounding planar portions of said sheet by a side wall, a circumferential groove in said side wall, and a second sheet of synthetic resin having edge portions pressure fitted into said circumferential groove.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.