Patent · US Expired

Curved tubular packing casing

US4975309A · kind A · utility

7Cited by

6References

12Claims

0Family size

Assignee

Hoechst GmbH · DE

Inventors

Herbert Gord · Ingelheim am Rhein, DE
Hoang Pho Tu · Eppstein, DE
Manfred Siebrecht · Wiesbaden, DE
Reinhold Becker

Key dates

Filing date	Apr 18, 1989
Grant date	Dec 4, 1990
Priority date	—
Expiry date	Apr 18, 2009

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10T428/1324
WIPO fieldOther special machines
WIPO sectorMechanical engineering

Abstract

A curved, tubular packing casing of unreinforced cellulose having non-uniform wall thickness in cross-section is disclosed. The area of minimum wall thickness lies opposite the area of maximum wall thickness and is situated in the area of the greater, outer radius of curvature. The maximum wall thickness lies in the range from about 50 to 160 .mu.m, and the minimum wall thickness lies in the range from about 10 to 50 .mu.m. The maximum wall thickness is 50 to 800% greater than the minimum wall thickness.

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