WIPO logo
Mobile | Deutsch | Español | Français | 日本語 | 한국어 | Português | Русский | 中文 | العربية |
PATENTSCOPE

Search International and National Patent Collections
World Intellectual Property Organization
Search
 
Browse
 
Translate
 
Options
 
News
 
Login
 
Help
 
Machine translation
1. (WO1979000079) BLANK FOR PIPE MANUFACTURE
Latest bibliographic data on file with the International Bureau   

Pub. No.:    WO/1979/000079    International Application No.:    PCT/SE1978/000023
Publication Date: 22.02.1979 International Filing Date: 17.07.1978
IPC:
B29C 53/78 (2006.01), F16L 11/16 (2006.01), F16L 9/16 (2006.01)
Applicants:
Inventors:
Priority Data:
7708787 02.08.1977 SE
Title (EN) BLANK FOR PIPE MANUFACTURE
(FR) EBAUCHE POUR LA FABRICATION D"UN TUBE
Abstract: front page image
(EN)Blank for pipe manufacture, intended to be wound helically so that a joint is formed between adjacent turns in the helically wound blank thereby, that a portion on the lateral edge (11) of the blank in a turn is fitted into a portion of the remaining lateral edge (12) of the blank in an adjacent turn. A portion (13) located between said two portions on the lateral edges of the blank has an outward bulge enclosing a cavity. Said bulge is of such a shape that the surface (18) of the cavity enclosed in a section through the transverse direction of the blank is substantially greater than the surface (21) in said section between the two adjacent edges (19, 20) on the blank, which are the places of attachment for the bulge. The surface (18) of the cavity further includes distances (22) in said section substantially in parallel with the transverse direction of the wall blank, which distances are substantially longer than the distance (21) between said adjacent edges (19, 20) on the blank. When forming a pipe of the blank, the bulge is located on the outside of the completed pipe. The bulge has the twofold object of providing a pipe formed of the blank with the function of an elastic bellows, in order to reduce stresses at movements of the pipe, and of rendering the pipe more rigid against compression.
(FR)Ebauche pour la fabrication d"un tube, destinee a etre enroulee helicoidalement de maniere a former un joint entre deux spires adjacentes dans une ebauche enroulee helicoidalement. A cet effet, une partie sur un bord lateral (11) de l"ebauche dans une spire s"ajuste dans une partie de l"autre bord lateral (12) de l"ebauche dans une spire adjacente. Une partie (13) situee entre les deux dites parties sur les bords lateraux presente une saillie vers l"exterieur enfermant une cavite. Cette saillie a une forme telle que la surface (18) de la cavite comprise dans une coupe transversale de l"ebauche est sensiblement plus grande que la surface (21) comprise dans ladite section entre les deux bords adjacents (19, 20). Ces derniers sont les endroits de fixation de la protuberance. La surface (18) de la cavite inclut de plus des distances (22) dans ladite coupe sensiblement parallele a la direction transversale de l"ebauche formant paroi. Ces distances sont plus grandes que la distance (21) entre les bords adjacents (19, 20) sur l"ebauche. Lorsqu"on forme un tube, la saillie se trouve a l"exterieur du tube termine. Elle a deux effets: donner au tube le role d"un soufflet elastique de maniere a reduire les contraintes lors de mouvements du tube, et rendre le tube plus resistant a la compression.
Designated States:
Publication Language: English (EN)
Filing Language: English (EN)