B - Operations – Transporting – 41 – F
Patent
B - Operations, Transporting
41
F
B41F 15/36 (2006.01)
Patent
CA 2496198
A screen support frame includes elongated frame members (12, 14, 16, 18) and at least one elongated secondary member (66) extending along at least a portion of one of the frame members. The secondary member includes a surface contacting a surface of the frame member and affixed thereto along at least a portion of the secondary member. The affixation of the secondary member occurs while differential strains are imposed on the frame member and the secondary member at the respective contact surfaces to apply a prestress or camber to the frame member. The secondary member may be welded to the frame member. According to another aspect of the invention, a tensioning frame includes rotatably supported rollers (22, 24 , 26, 28) for tensioning the screen secured together by connectors (38, 40). The rollers include hollow cylinders defining an interior in which at least one elongated reinforcing member extends to prestress or camber the roller.
La présente invention concerne un châssis de stencil constitué d'éléments longs (12, 14, 16, 18) et d'au moins un élément long secondaire (66) prenant sur au moins une partie de la longueur de l'un des éléments longs. Une surface de l'élément secondaire est en contact avec une surface de l'élément de châssis auquel elle est fixée sur au moins une partie de l'élément secondaire. Le montage de l'élément secondaire se fait pendant que s'exercent sur l'élément de châssis et sur l'élément secondaire des contraintes différentielles au niveau des surfaces de contact correspondantes de façon à appliquer une précontrainte ou un cintrage à l'élément de châssis. L'élément secondaire peut être soudé à l'élément de châssis. Selon un autre aspect de l'invention, on utilise un châssis tensionneur comprenant des rouleaux supportés rotatifs (22, 24, 26, 28) pour tendre le stencil au moyen de raccords d'angle (38, 40). Les rouleaux comportent des cylindres creux définissant un intérieur dans lequel passe au moins un élément de renfort long de façon à précontraindre ou cintrer le galet.
Chouinard Michael P. A.
Mckeever Thomas
Newman Don
Chouinard Michael P. A.
Mccarthy Tetrault Llp
Mckeever Thomas
Newman Don
LandOfFree
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