Method for producing an adhesive closure element
US7585169B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 15, 2002 |
| Grant date | Sep 8, 2009 |
| Priority date | — |
| Expiry date | Feb 6, 2025 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29L2031/729
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
The invention relates to a method for producing an adhesive closure element made of a thermoplastic synthetic material, by means of an extruder, which is produced without the need for screens, using a tempered forming cylinder (3) coated in rubber and a pressure cylinder in the form of a tempered pressure and smoothing cylinder. According to the invention, the synthetic material of a strip of film (2) is compressed by a wide split nozzle (1) of the extruder into pin holes (4) embodied as pocket holes in a rubber layer (7) which is arranged on the tempered forming cylinder (3), said layer of rubber (7) and the pin holes being provided with a teflon covering. The pin strip (5) is guided by means of a tempered withdrawal cylinder (10) between a gap with a gap with a pression cylinder (9) heated to a temperature greater than 230° C. and covered with PTFE at a low speed of between approximately 1 m/min. and 20 m/min. Alternatively, the pin heads (11) are formed by a plasma device (13) or by a plasma are (14) produced therefrom and the strip is displaced at a speed of between 12 m/min. and 200 m/min.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.