Plastic article or earthenware shaping or treating: apparatus – Air felting type shaping means – Means forming running length product
Reexamination Certificate
2005-03-08
2005-03-08
Mackey, James P. (Department: 1722)
Plastic article or earthenware shaping or treating: apparatus
Air felting type shaping means
Means forming running length product
C425S363000, C425S404000, C425S405100
Reexamination Certificate
active
06863512
ABSTRACT:
An apparatus and method for continuously forming composites comprising filler materials and thermoactive materials, particularly waste cellulosic materials and waste thermoplastics, are described. One embodiment of the apparatus includes either a batchwise or continuous mixer, such as a cyclone, for forming mixtures comprising filler and thermoactive material. The mixtures are conveyed to a continuous consolidation apparatus. Alternatively, the mixtures may be densified in a densifying apparatus before entering the consolidation apparatus. The consolidation apparatus includes a hot-gas distribution system having plural paired gas cells, such as rollers or hoods, for applying hot air to the charge. A first cell of each pair applies gas to the mixture. The second cell of each pair operates at a pressure less than that of the first cell, thereby creating a pressure differential across the charge. Certain embodiments of the apparatus include at least one set of baffles positioned adjacent a cell, at least one shroud positioned about a cell, or at least one set of baffles positioned adjacent a first cell and at least one shroud positioned about a second cell. The baffles and shrouds are used to eliminate or substantially reduce the amount of gas that is vented to the surrounding atmosphere. The method comprises continuously consolidating the mixtures by applying a hot, dry noncondensable gas to the mixture. Besides the filler material and the thermoactive material the mixture may further include materials selected from the group consisting of biocides, fungicides, fire retardants, conductive materials, pigments, water retardants, wax-like materials, coupling agents, crosslinking agents, and combinations thereof.
REFERENCES:
patent: 2909804 (1959-10-01), Means
patent: 3023136 (1962-02-01), Himmelheber et al.
patent: 3995003 (1976-11-01), Potter et al.
patent: 3995980 (1976-12-01), Smith
patent: 3998580 (1976-12-01), Pffiffer
patent: 4094756 (1978-06-01), Taylor
patent: 4263007 (1981-04-01), Battigelli et al.
patent: 4364984 (1982-12-01), Wentworth
patent: 4379193 (1983-04-01), Hunt
patent: 4416949 (1983-11-01), Gabellieri et al.
patent: 4609519 (1986-09-01), Pichard et al.
patent: 4894192 (1990-01-01), Warych
patent: 4940502 (1990-07-01), Marcus
patent: 5075057 (1991-12-01), Hoedl
patent: 5088910 (1992-02-01), Goforth et al.
patent: 5155146 (1992-10-01), Reetz
patent: 5169580 (1992-12-01), Marcus
patent: 5178802 (1993-01-01), Cree et al.
patent: 5284546 (1994-02-01), Tilby
patent: 5356278 (1994-10-01), Reetz
patent: 5391438 (1995-02-01), Pasternak
patent: 5417904 (1995-05-01), Razi et al.
patent: 5435954 (1995-07-01), Wold
patent: 5441801 (1995-08-01), Deaner et al.
patent: 5474722 (1995-12-01), Woodhams
patent: 5486553 (1996-01-01), Deaner et al.
patent: 5497594 (1996-03-01), Giuseppe et al.
patent: 5516472 (1996-05-01), Laver
patent: 5518677 (1996-05-01), Deaner et al.
patent: 5539027 (1996-07-01), Deaner et al.
patent: 5585155 (1996-12-01), Heikkila et al.
patent: 5711972 (1998-01-01), Schedin et al.
patent: 5718786 (1998-02-01), Lindquist et al.
patent: 5736218 (1998-04-01), Iwata et al.
patent: 5759680 (1998-06-01), Brooks et al.
patent: 5773138 (1998-06-01), Seethamraju et al.
patent: 5824246 (1998-10-01), Reetz
patent: 5827607 (1998-10-01), Deaner et al.
patent: 5872190 (1999-02-01), Gutowski et al.
patent: 5879757 (1999-03-01), Gutowski et al.
patent: 6054081 (2000-04-01), Bielfeldt
patent: 6200682 (2001-03-01), Dubelsten et al.
patent: 6605245 (2003-08-01), Dubelsten et al.
patent: 14 53 374 (1976-09-01), None
patent: 40 09 883 (1991-10-01), None
patent: 0 045 216 (1981-07-01), None
patent: 0 267 516 (1988-05-01), None
patent: 0 383 572 (1990-08-01), None
patent: 903499 (1962-08-01), None
patent: 50-757 (1975-01-01), None
patent: 495 213 (1975-12-01), None
patent: WO 9507808 (1995-03-01), None
patent: WO 9519995 (1995-07-01), None
patent: WO 9520006 (1995-07-01), None
patent: WO 9531318 (1995-11-01), None
U.S. Appl. No. 09/336,339, filed Jun. 18, 1999.
English-language translation of Bunzl's German Patent No. 1 453 374.
Unofficial English-language translation of SU 495 213 (Dec. 1975).
Bataille et al., “Effect of Cellulose Fibers in Polypropylene Composites,” Polymer Composites, 10(2): 103-108 (1989).
Bataille et al., “Interfacial Phenomena in Cellulose/Polyethylene Composites,” Polymer Composites 11(5):301-304 (1990).
Cruz-Ramos, C.A., “Natural Fibre Reinforced Thermoplasitcs. In: Mechanical Properties of Reinforced Thermoplasics,” D.W. Clegg and A.A. Collyer eds. Elsevier, Applied Sci. Publ., London, U.K., pp. 65-81 (1986).
Dalvag et al., “The Efficiency of Cellulosic Fillers in Common Thermoplastics. Part II. Filling with Processing Aids and Coupling Agents,” Intern. J. Polymeric Mater. 11:9-38 (1985).
Hoff Forest Products literature on StranDEK Decking.
Klason et al., “The Efficiency of Cellulosic Fillers in Common Thermoplastics. Part I. Filling without Processing Aids or Coupling Agents,” Intern. J. Polymeric Mater. 10:159-187 (1984).
Kokta et al., “Use of Wood Flour as Filler in Polypropylene: Studies on Mechanical Properties,” Polym.-Plast. Technol. Eng. 28(3):247-259 (1989).
Kokta et al., Composites of Polyvinyl Chloride-Wood Fibers. I. Effect of Isocyanate as a Bonding Agent, Polym. Plast. Technol. Eng. 29(1/2):87-118 (1990).
Kokta et al., “Composites of Poly(Vinyl Chloride) and Wood Fibers. II. Effect of Chemical Treatment,” Polymer Composites 11(2):84-89 (1990).
Lopata et al., “Electron-beam processing of wood fiber-reinforced polypropylene,” Tibor Czvikovszky, Hungarian Plastics Research Institute, H-1950 Budapest, Hungary, AECL Research, Whiteshell Laboratories, Pinawa, Manitoba, Canada, pp. 68-74.
Maldas et al., “Effects of Coating Treatments on the Mechanical Behavior of Wood Fiber-Filled Polystyrene Composites, I. Use of Polyethylene and Isocyanate as Coating Composites,” J. Applied Polymer Sci. 40:917-928 (1990).
Maldas et al., “Effect of Recycling on the Mechanical Properties of Wood Fiber-Polystyrene Composites. Part I: Chemithermomechanical Pulp as a Reinforcing Filler,” Polymer Composites 11(2):77-83 (1990).
Raj et al., “Use of Wood Fibers in Thermoplastics. VII. The Effect of Coupling Agents in Polyethylene-Wood Fiber Composites,” J. Applied Polymer Sci. 37:1089-1103 (1989).
Woodhams et al., “Wood Fibers as Reinforcing Fillers for Polyolefins,” Polymer Eng. Sci. 24(15):1166-1171 (1984).
Youngquist et al., “Mechanical and Physical Properties of Air-Formed Wood-Fiber/Polymer-Fiber Composites,” Forest Products Journal, vol. 42, No. 6, pp. 42-48 (1992).
Zadorecki et al., “Future Prospects for Wood Cellulose as Reinforcement in Organic Polymer Composites,” Polymer Composiites 10(2):69-77 (1989).
Dubelsten Paul
Knowles Lorence E.
Van Kleek Erik J.
Klarquist & Sparkman, LLP
Mackey James P.
OfficeMax Incorporated
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