Moulding of synthetic plastics sheet material

Details Moulding of synthetic plastics sheet material Moulding of synthetic plastics sheet material

1976-12-10

1978-09-05

Silbaugh, Jan H.

Plastic and nonmetallic article shaping or treating: processes

Mechanical shaping or molding to form or reform shaped article

Shaping against forming surface

264 93, 264292, 264323, 4253871, 425398, B29C 1700, B29C 1704

Patent

active

041120426

ABSTRACT:
A method for molding thermoformable synthetic plastic sheet material into a circular lid having a downturned rim with a bead on its inner face. The sheet material is softened by heating and disposed between male and female dies which are moved together to fold the sheet material over the male die to form the downturned rim. The material forming the rim is compressed and sheared between the dies to force material into a bead cavity in the male die to form the bead. The molded lid can fit over the top edge of a container with the bead in sealing engagement with the container.

REFERENCES:
patent: 3470281 (1969-09-01), Knowles
patent: 3548459 (1970-12-01), Dockery
patent: 3757718 (1973-09-01), Johnson
patent: 3825166 (1974-07-01), Padovani

Affiliated with

Also associated with

Rating

Moulding of synthetic plastics sheet material does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Moulding of synthetic plastics sheet material, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Moulding of synthetic plastics sheet material will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2096361