Dimensionally stable thermoplastic tubular articles

B - Operations – Transporting – 65 – D

Patent

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

190/150

B65D 25/54 (2006.01) B29D 23/00 (2006.01) B65D 1/12 (2006.01)

Patent

CA 1255241

ABSTRACT OF THE DISCLOSURE DIMENSIONALLY STABLE THERMOPLASTIC TUBULAR ARTICLES For heat-setting tubular articles (such as can bodies) of an at least partly biaxially oriented crystallisable polymer, preferably a saturated linear polyester such as polyethylene terephthalate, e.g. for thermally processable food containers, a tube of the polymer is fitted over a mandre1 and clamped at its ends to the mandrel at a temperature below the glass transition temperature of the polymer. The tube is then heated, e.g. by inserting a heater into the interior of the mandrel, above the temperature to which it is to be heat-set (at least 60°C above for PET) whereupon it shrinks into contact with the mandrel but is restrained from axial or further radial shrinkage. The tube and mandrel are cooled to below the heat-set temperature and the tube may then be cut into can body sections by knives engaging in circumferential grooves . Contact between the tube and mandrel is released, e.g. by forcing compressed air out through small holes in the mandrel surface to allow the tube and mandrel to be separated. Tubular bodies with one closed end can be heat-set on a mandrel with a correspondingly shaped end.

501674

LandOfFree

Say what you really think

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

Rating

Dimensionally stable thermoplastic tubular articles does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Dimensionally stable thermoplastic tubular articles, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Dimensionally stable thermoplastic tubular articles will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFCA-PAI-O-1280308

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