Rigidizer for plastic vessels

Stock material or miscellaneous articles – Hollow or container type article – Polymer or resin containing

Patent

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

428 364, 4538, 4580, 4581, 4584, 4619, B29D 2200

Patent

active

054947189

ABSTRACT:
A shaped rigid thermoplastic cradle and leveler for vessels such as sanitaryware is disclosed. The cradle and leveler are separately formed or integrally shaped from a single thermoformed sheet of rigid thermoplastic material. The rigid thermoplastic material has a flexural modulus of at least about 300,000 psi to provide sufficient rigidity in the sidewall of the cradle. The leveler includes an integral floor leveling means for providing a designed pitch so as to conform to the desired pitch of the floor region of the vessel toward the drain hole. The floor region comprises a plurality of tapering, alternating upper and lower contacting regions. Between each adjacent upper contacting region is defined unsupported span regions having the shortest distance between adjacent upper contact regions of not more than 12 inches (30.5 cm). Preferably the shortest distance between adjacent upper contact regions defining the unsupported span is from 2.5 inches to about 6 inches. A variety of rigid thermoplastic materials are adaptable herewith and include acrylonitrile-butadiene- styrene copolymers, styrene-acrylonitrile copolymer, acrylonitrile-styrene-methacrylate copolymers, polystyrene, styrene-alpha methyl styrene copolymers, polyethylene, polypropylene, polycarbonate, and polyvinyl chloride. The most preferred embodiment comprises rigid fiber reinforced polyvinyl chloride.

REFERENCES:
patent: 3870679 (1975-03-01), Mitchell et al.
patent: 4180529 (1979-12-01), Hoffman
patent: 4289717 (1981-09-01), Bortz
patent: 4290154 (1981-09-01), Benjamin
patent: 4341883 (1982-07-01), Gift
patent: 4598123 (1986-07-01), Cutter
patent: 4784904 (1988-11-01), Wood et al.
patent: 4844944 (1989-07-01), Graefe et al.
patent: 4868058 (1989-09-01), Biglione et al.
patent: 5036121 (1991-07-01), Coaker
patent: 5069851 (1991-12-01), Hicks et al.
Lumaswirl.RTM. product literature American National Standards Institute Specification for plastic bathtub unit.
Photograph of Trade Show Display from Fall 1992 Tub & Spa Show.

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

Rigidizer for plastic vessels does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Rigidizer for plastic vessels, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Rigidizer for plastic vessels will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFUS-PAI-O-1677474

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