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1. WO1992016357 - STRETCHING DEVICE

Publication Number WO/1992/016357
Publication Date 01.10.1992
International Application No. PCT/JP1991/000361
International Filing Date 15.03.1991
IPC
B29C 55/16 2006.1
BPERFORMING OPERATIONS; TRANSPORTING
29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
55Shaping by stretching, e.g. drawing through a die; Apparatus therefor
02of plates or sheets
10multiaxial
12biaxial
16simultaneously
CPC
B29C 55/165
BPERFORMING OPERATIONS; TRANSPORTING
29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
55Shaping by stretching, e.g. drawing through a die; Apparatus therefor
02of plates or sheets
10multiaxial
12biaxial
16simultaneously
165Apparatus therefor
Applicants
  • KITAMURA, Atsushi [JP]/[JP]
Inventors
  • KITAMURA, Atsushi
Agents
  • OISHI, Yukio
Priority Data
Publication Language Japanese (ja)
Filing Language Japanese (JA)
Designated States
Title
(EN) STRETCHING DEVICE
(FR) DISPOSITIF D'ETIRAGE
Abstract
(EN) A device for stretching a sheet (S) such as a plastic sheet, in which the sheet is gripped at both selvages of the front and reverse surfaces by a large number of holding members (1) ... and stretched while being transferred from the upstream side to the downstream side, and said holding members (1) are provided with an endless driving belt (2) which operates to grip and transfer the sheet (S). The device enables not only simultaneous biaxial uniform stretching but also easy change of the stretch ratio and, further, easy changeover to stretching in the longitudinal direction only or that in the transverse direction only.
(FR) Dispositif d'étirage d'une feuille (S) telle qu'une feuille de plastique, dans lequel la feuille est saisie au niveau des deux lisières des surfaces avant et arrière par un grand nombre d'éléments de saisie (1) ... et étirée pendant son transfert du côté amont au côté aval. Les éléments de saisie (1) comportent une bande transporteuse sans fin (2) qui saisit et transfère la feuille (S). Le dispositif permet non seulement un étirage biaxial simultané unifrome, mais également une modification aisée du rapport d'étirage, ainsi qu'un passage aisé d'un mode d'étirage uniquement dans le sens longitudinal à un mode d'étirage uniquement dans le sens transversal, et vice-versa.
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