Extrusion apparatus and systems

Details Extrusion apparatus and systems Extrusion apparatus and systems

1991-06-28

1993-08-03

Chiesa, Richard L.

Plastic article or earthenware shaping or treating: apparatus

Means feeding fluent stock from plural sources to common...

Extrusion shaping means

425 70, B29C 4704, B29C 4792

Patent

active

052327124

ABSTRACT:
Systems are disclosed for forming an extrudate. The systems include an extrusion head assembly having at least a first inner bore and a second outer bore, a coagulant solution supply and a polymeric casting solution supply. The coagulant supply provides coagulant to the inner bore of the extrusion head assembly, and the polymeric casting solution supply provides a casting solution to the outer bore. Using this system, the coagulant and polymeric solution are coextruded to form an extrudate having a desired configuration. The present invention further includes a rapid action valve controlling at least one of the coagulant or polymer supplies.

REFERENCES:
patent: 3962383 (1976-06-01), Hagiwara et al.
patent: 3972664 (1976-08-01), Fillmann
patent: 4055205 (1977-10-01), Withoff et al.
patent: 4171561 (1979-10-01), Bainard et al.
patent: 4251195 (1981-02-01), Suzuki et al.
patent: 4288494 (1981-09-01), Porter et al.
patent: 4333906 (1982-06-01), Porter et al.
patent: 4352883 (1982-10-01), Lim
patent: 4353888 (1982-10-01), Seftoa
patent: 4391909 (1983-07-01), Lim
patent: 4426337 (1984-01-01), Suzuki et al.
patent: 4657496 (1987-04-01), Ozeki et al.
patent: 4695466 (1987-09-01), Morishita et al.
patent: 4867664 (1989-09-01), Fukuhara
patent: 4892538 (1990-01-01), Aebischer et al.
patent: 4902295 (1990-02-01), Walthall et al.
patent: 4902450 (1990-02-01), Morrison
patent: 4907957 (1990-03-01), Nakagawa et al.
patent: 4954067 (1990-09-01), Brussel
Tresco et al. (1992) Asaio Journal 38:17-23.
Aebischer et al. (1991) Science 252:133.
Winn et al. (1991) Experimental Neurology 113:322-329.
Aebischer et al. (1991) Brain Research 560:43-49.
Aebischer et al. (1991) J. Biomec. Engineering 113:178-183.
Aebischer et al. (1991) Experimental Neurology 111:269-275.
Aebischer et al. (1991) Biomaterials 12:50-56.
Jaeger et al. (1991) Brain Research 551:163-170.
Hoffman et al. (1990) Experimental Neurology 110:39-44.
Winn et al. (1989) Experimental Neurology 105:244-250.
Winn et al. (1989) J. Biomed. Mater. Res. 23:31-44.
Aebischer et al. (1988) Brain Research 448:364-368.
Jaeger et al. (1990) Progress in Brain Research 82:41-46.
Aebischer et al., "Long-Term Cross-Species Brain Transplantation of a Polymer-Encapsulated Dopamine-Secreting Cell Line," Experimental Neurology 111, 269-275 (1991).
Aebischer et al., "Macroencapsulation of dopamine-secreting cells by coextrusion with an organic polymer solution," Biomaterials 1991 vol. 12 Jan., p. 50.
Sefton et al., "Microencapsulation of Mammalian Cells in a Water-Insoluble Polyacrylate by Coextrusion and Inerfacial Precipitation," Biotechnology and Bioengineering. vol. XXIX, pp. 1135-1143 (1987).
Sugamore and Sefton, "Microencapsulation of Pancreatic Islets in a Water Insoluble Polyacrylate," vol. XXXV Trans Am Soc Artifl Intern Organs 1989, pp. 791-799.

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