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1. (WO2002051622) METHOD OF REDUCING THE WALL THICKNESS OF A PTFE TUBE AND PRODUCT FORMED THEREBY
Latest bibliographic data on file with the International Bureau   

Pub. No.: WO/2002/051622 International Application No.: PCT/US2001/048107
Publication Date: 04.07.2002 International Filing Date: 11.12.2001
Chapter 2 Demand Filed: 07.06.2002
IPC:
B29C 55/24 (2006.01) ,B29C 67/00 (2006.01)
B PERFORMING OPERATIONS; TRANSPORTING
29
WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
C
SHAPING OR JOINING OF PLASTICS; SHAPING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL; AFTER- TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
55
Shaping by stretching, e.g. drawing through a die; Apparatus therefor
22
of tubes
24
radial
B PERFORMING OPERATIONS; TRANSPORTING
29
WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
C
SHAPING OR JOINING OF PLASTICS; SHAPING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL; AFTER- TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
67
Shaping techniques not covered by groups B29C39/-B29C65/93
Applicants:
SCIMED LIFE SYSTEMS, INC. [US/US]; One SciMed Place Maple Grove, MN 55331-1566, US
Inventors:
HILL, Jason, P.; US
LININGER, James, R.; US
BROWN, Brian, J.; US
Agent:
SALVATORE, J., Abbruzzese ; Hoffmann & Baron, LLP 6900 Jericho Turnpike Syosset, NY 11791, US
Priority Data:
09/748,41726.12.2000US
Title (EN) METHOD OF REDUCING THE WALL THICKNESS OF A PTFE TUBE AND PRODUCT FORMED THEREBY
(FR) PROCEDE PERMETTANT DE REDUIRE L'EPAISSEUR DE LA PAROI D'UN TUBE EN PTFE ET PRODUIT AINSI FORME
Abstract:
(EN) A thin wall PTFE tube is formed from an extruded green tube (10). The PTFE tube includes an inner tubular surface and an opposed outer tubular surface defining a tubular wall of a first thickness. The tubular wall is compressed to uniformly reduce the wall-thickness and circumferentially orient the tube. The PTFE tube is positioned over a first elongate roller (22) with the inner tubular surface being in contact therewith. A second roller (24) is positioned against the outer tubular surface of the PTFE tube. The pair of rollers are counter rotated so as to circumferentially compress the tubular (12) wall between the rollers (22, 24). This results in the uniform reduction in the tubular wall (12) from the first thickness to a lesser second thickness and a circumferential orientation otherwise not occuring in an extruded PTFE paste extrusion.
(FR) L'invention concerne un tube en PTFE à paroi mince, formé à partir d'un tube vert extrudé. Le tube en PTFE comprend une surface tubulaire interne et une surface tubulaire externe opposée qui définissent une paroi tubulaire présentant une première épaisseur. La paroi tubulaire est comprimée afin de réduire uniformément l'épaisseur de la paroi et à orienter le tube de manière circulaire. Le tube en PTFE est placé par dessus un premier rouleau allongé, la surface tubulaire interne étant en contact avec le rouleau. Un second rouleau est placé contre la surface tubulaire externe du tube en PTFE. Les deux rouleaux sont entraînés selon un mouvement contra-rotatif afin de comprimer la circonférence de la paroi tubulaire entre les rouleaux. Ce procédé permet d'obtenir une réduction uniforme de la paroi tubulaire d'une première épaisseur à une seconde épaisseur plus fine, ainsi qu'une orientation circulaire, ce qu'il n'est pas possible d'obtenir dans une extrusion de pâte en PTE extrudée.
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Designated States: AE, AG, AL, AM, AT, AU, AZ, BA, BB, BG, BR, BY, BZ, CA, CH, CN, CO, CR, CU, CZ, DE, DK, DM, DZ, EC, EE, ES, FI, GB, GD, GE, GH, GM, HR, HU, ID, IL, IN, IS, JP, KE, KG, KP, KR, KZ, LC, LK, LR, LS, LT, LU, LV, MA, MD, MG, MK, MN, MW, MX, MZ, NO, NZ, PL, PT, RO, RU, SD, SE, SG, SI, SK, SL, TJ, TM, TR, TT, TZ, UA, UG, UZ, VN, YU, ZA, ZW
African Regional Intellectual Property Organization (ARIPO) (GH, GM, KE, LS, MW, MZ, SD, SL, SZ, TZ, UG, ZM, ZW)
Eurasian Patent Office (AM, AZ, BY, KG, KZ, MD, RU, TJ, TM)
European Patent Office (EPO) (AT, BE, CH, CY, DE, DK, ES, FI, FR, GB, GR, IE, IT, LU, MC, NL, PT, SE, TR)
African Intellectual Property Organization (BF, BJ, CF, CG, CI, CM, GA, GN, GQ, GW, ML, MR, NE, SN, TD, TG)
Publication Language: English (EN)
Filing Language: English (EN)