Plastic article or earthenware shaping or treating: apparatus – Preform reshaping or resizing means: or vulcanizing means... – Including shaping means comprising fluid pressure contacting...
Patent
1975-04-16
1976-08-24
Spicer, Jr., Robert L.
Plastic article or earthenware shaping or treating: apparatus
Preform reshaping or resizing means: or vulcanizing means...
Including shaping means comprising fluid pressure contacting...
425385, 264 90, 264285, 93 84FF, 93 84TW, B29C 1702
Patent
active
039764184
ABSTRACT:
Moving tubing, such as of plastic film, is continuously gusseted in the longitudinal direction, by pulling apart opposed side sections of the tubing, at a local station by application of vacuum force selectively to the surface of the tube, leaving one or more section(s) of the tubing free of such vacuum force, and continuously inwardly tucking such free section(s) by means of gusset blade(s) or the like, or alternately by means of atmospheric force pressing inwardly on said free section(s). In species embodiments of the invention, the vacuum suction is applied by means of opposed perforate belts or rolls through which the vacuum is pulled, and which are operated at essentially the same rate of speed as the forward movement of the tubing.
REFERENCES:
patent: 331721 (1885-12-01), Lorenz et al.
patent: 407814 (1889-07-01), Burdick
patent: 2542652 (1951-02-01), Freund
patent: 2544044 (1951-03-01), Reber et al.
patent: 2720680 (1955-10-01), Gerow
patent: 3274315 (1966-09-01), Kawamura
patent: 3543334 (1970-12-01), Sudo
patent: 3684421 (1972-08-01), Pilcher
patent: 3807076 (1974-04-01), Bridge
Halldorson Burke M.
Spicer, Jr. Robert L.
The Dow Chemical Company
LandOfFree
Apparatus for gusseting continuous lengths of tubular 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 Apparatus for gusseting continuous lengths of tubular material, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Apparatus for gusseting continuous lengths of tubular material will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-775641