Method and apparatus for folding the edges of a sheet of materia

Details Method and apparatus for folding the edges of a sheet of materia Method and apparatus for folding the edges of a sheet of materia

1988-06-14

1989-06-13

Dawson, Robert A.

Plastic and nonmetallic article shaping or treating: processes

Mechanical shaping or molding to form or reform shaped article

Bending or twisting of work

156227, 156479, 425398, 425403, 493167, B29C 5304

Patent

active

048391263

ABSTRACT:
A method and apparatus for simultaneously folding the edges of a sheet of material, particularly the rigid plastic sheets of material having concave sections therein which are used as covers in "blister" packages. It utilizes a die having walls on the sides and a shelf inside the walls, a compressible layer which rests on top of the shelf over which the sheet of material is placed, and a heating plate which presses down on the sheet of material causing the edges of the sheet to become pliable and to bend upward against the walls of the die, and then folding the upright edges over a plate.

REFERENCES:
patent: 1326826 (1919-12-01), Anthony
patent: 1365648 (1921-01-01), Anthony
patent: 1811871 (1931-06-01), Anthony
patent: 2487494 (1949-11-01), Taber
patent: 2620854 (1952-12-01), Wetherell
patent: 2740458 (1956-04-01), Wold
patent: 2756805 (1956-07-01), Silverman
patent: 2808099 (1957-10-01), Silverman
patent: 3089536 (1963-05-01), Bolles
patent: 3147172 (1964-09-01), Wesa
patent: 3580770 (1971-05-01), Dyal
patent: 3753831 (1973-08-01), Copithorne
patent: 3978191 (1976-08-01), Allen et al.
patent: 4019944 (1977-04-01), Tomita
patent: 4239572 (1980-12-01), Tomita
patent: 4347091 (1982-08-01), Hauck et al.
patent: 4443398 (1984-04-01), Martinelli et al.
patent: 4601689 (1986-07-01), Finkle et al.

Affiliated with

Also associated with

Rating

Method and apparatus for folding the edges of a sheet of materia 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 folding the edges of a sheet of materia, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and apparatus for folding the edges of a sheet of materia will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1276166