Method for making a collapsible dispensing tube having an anchored barrier member
US4338278A · kind A · utility
Inventor
Key dates
| Filing date | Jan 21, 1980 |
| Grant date | Jul 6, 1982 |
| Priority date | — |
| Expiry date | Jan 21, 2000 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S264/41
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
Method for making a collapsible dispensing tube in which plastic fabricating materials other than conventional materials can be selected which are more suitable, since the pressure in the process is increased while the temperature is decreased. This manufacturing method utilizes a locking taper resulting in a better bond between the headpiece, barrier member, and the inner wall of the collapsible tube and substantially eliminating blowby of plastic material into said collapsible tube. The barrier member extends to and is tightly engaged with the adjacent inner wall of the collapsible tube and substantially eliminates bypass of gases around the barrier member. The method of manufacture permits the selection of the most suitable thermoplastic material for the intended use from a group of materials.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.