Method and apparatus for stretching film or fibrous web

Plastic and nonmetallic article shaping or treating: processes – Disparate treatment of article subsequent to working,... – Effecting temperature change

Patent

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

26 72, 26 82, 26 85, 2642888, 2642896, 2642902, B29C 1702

Patent

active

045253170

ABSTRACT:
A film or fibrous web which has been stretched by moving at least two laterally spaced first longitudinal portions gripped by a first gripping means along at least two arcuate divergent paths formed jointly by at least two radially disposed first pulleys and endless belt means trained arcuately therearound, is further stretched by moving at least two laterally spaced second longitudinal portions adjacent to the first longitudinal portions gripped by a second gripping means along at least two arcuate divergent paths contiguous to the first arcuate divergent paths, respectively, formed jointly by at least two second pulleys, respectively, disposed downstream of and close to the first pulleys in coplanar relation thereto and second endless belt means trained arcuately therearound. The film while being stretched is heated to a temperature suitable for stretching with heated air and the like, or is softened by immersing in a bath of solvent or plasticizer.

REFERENCES:
patent: 3807004 (1974-04-01), Anderson
patent: 3884748 (1975-05-01), Anderson
patent: 4331624 (1982-05-01), Yazawa
patent: 4349500 (1982-09-01), Yazawa
patent: 4434128 (1984-02-01), Okada

LandOfFree

Say what you really think

Search LandOfFree.com for the USA inventors and patents. Rate them and share your experience with other people.

Rating

Method and apparatus for stretching film or fibrous web does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Method and apparatus for stretching film or fibrous web, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and apparatus for stretching film or fibrous web will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFUS-PAI-O-553904

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.