A - Human Necessities – 61 – C
Patent
A - Human Necessities
61
C
A61C 17/08 (2006.01) B31F 1/20 (2006.01) B65H 27/00 (2006.01)
Patent
CA 2181250
A flexible paper tube, in particular a throw-away saliva suction unit for dentistry, comprises two tubular sections integrally connected to each other via a bellows and is characterized in that the paper tube (2, 6) is constructed from multi-layer paper, in particular having 3 through 15 layers and preferentially 4 to 10 layers of thickness 0.07 to 0.35 mm, in particular 0.1 to 0.2 mm and with a wall thickness between 0.2 to 2.5 mm, preferentially 0.5 to 1 mm. The fluting and folding of the bellows is preferentially done before hardening of the glued paper layers. The paper tube (2, 6) in accordance with the invention guarantees that the tube passage is not reduced in size when flexing of the tube through bending of the bellows.
L'invention concerne un manchon de papier flexible, notamment un dispositif d'aspiration de salive jetable, utilisé en dentisterie, qui se compose de deux sections tubulaires reliées par un soufflet pour ne former qu'une seule pièce. Ce dispositif se caractérise en ce que le manchon de papier (2, 6) comprend plusieurs couches de papier, notamment entre 3 et 15, de préférence entre 4 et 10, chaque couche faisant entre 0,07 et 0,35 mm d'épaisseur, notamment entre 0,1 et 0,2 mm. L'épaisseur de la paroi du tube est comprise entre 0,2 et 2,5 mm, de préférence entre 0,5 et 1 mm. Le gaufrage et le pliage du soufflet s'effectuent de préférence avant que les couches de papier collées ne soient durcies. Dans le manchon de papier (2, 6) selon l'invention, le passage intérieur conserve toujours la même dimension, cela grâce au pliage en U du soufflet.
Lange-Mickel Gertrud
Morsch Paul
Wahl Gebhard
Albert Eger Gmbh & Co.
Ridout & Maybee Llp
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