Intermittently translating draw tape stretched between nip rolls
US4650451A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Oct 18, 1985 |
| Grant date | Mar 17, 1987 |
| Priority date | — |
| Expiry date | Oct 18, 2005 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S493/928
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A thermoplastic tape having thick and wide end portions with a relatively thin and narrow stretched central portion between them is produced by a first pair of nip rolls running at a slow speed, and a second pair of nip rolls running at a higher speed. The tape between the nip rolls is intermittently moved away from, and toward said first nip rolls to stretch it to produce the relatively thin and narrow central portion. The second pair of nip rolls is mounted on a pivoted arm so that they are movable toward, and away from said first nip rolls. Alternatively, an idler roll between the two pairs is moved toward, and away from, the first nip rolls.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.