Plastic and nonmetallic article shaping or treating: processes – Mechanical shaping or molding to form or reform shaped article – Plural sequential shaping or molding steps on same workpiece
Patent
1989-05-17
1992-03-03
Bell, James J.
Plastic and nonmetallic article shaping or treating: processes
Mechanical shaping or molding to form or reform shaped article
Plural sequential shaping or molding steps on same workpiece
264 291, 264 405, 264109, 264120, 264122, 264126, 264324, C01B 3100
Patent
active
050930516
ABSTRACT:
A fusion bonded fiber product is made by compressing between heated dies a mat of moisture-containing fibers of the type that change irreversibly to an amorphous nonglassy state that permits fiber-to-fiber bonding at a characteristic critical temperature. The further compression of the partially compacted mat is stopped or slowed when the mat is a small multiple of the desired caliper for the bonded product for a period of time sufficient to vaporize the moisture content of the mat. During this time period, most of the vaporized moisture content of the mat is expelled as saturated steam through the mat surfaces while the temperature of the mat is still well below the critical temperature. Then, the compression of the mat is continued under continuous consolidation to the final density and caliper of the fusion bonded product while the mat is heated to a temperature above the critical temperature. The heat and pressure from the fully compacted mat are removed and then the mat is released as said bonded product directly into the working space. Apparatus for carrying out the process is disclosed as is the product made by the process and apparatus.
REFERENCES:
patent: 2480851 (1949-09-01), Goss
patent: 4111744 (1978-09-01), Reiniger
patent: 4216179 (1980-08-01), Lamberto et al.
patent: 4933125 (1990-06-01), Reiniger
patent: 4942081 (1990-07-01), Reiniger
Altomar-II Trust by Kenneth Safe, Jr. Trustee
Bell James J.
LandOfFree
Process for making cellulose-containing products does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Process for making cellulose-containing products, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Process for making cellulose-containing products will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-270525