Paper sheet feeding apparatus and gate forming member therefor

Details Paper sheet feeding apparatus and gate forming member therefor Paper sheet feeding apparatus and gate forming member therefor

B - Operations, Transporting

65

H

B65H 7/18 (2006.01) B65H 3/52 (2006.01)

Patent

CA 2247465

A paper sheet feeding apparatus which includes a gate forming member (51) positioned above the upper run of the sheet feeding belts (30) and so as to define a nip therebetween. The gate forming member (51) comprises a cylindrical roll having a plurality of annular grooves (57) extending about the circumference thereof, and an elastomeric ring (62) disposed in each of the grooves. The outer peripheral surface of the roll also includes a relief (58) extending axially along the length thereof and positioned so as to oppose the nip, and the rings are sized so as to be exposed on the portion of the outer peripheral surface defined by the relief. In operation, the lowermost sheet is fed by the sheet feeding belts through the nip without engaging the exposed rings, and without significant frictional resistance, while the sheet immediately above the lowermost sheet engages the exposed rings and is retarded in its advance by its engagement with the rings.

L'invention concerne un dispositif d'alimentation en feuilles, lequel comprend un élément formant porte positionné au-dessus du trajet supérieur des courroies d'alimentation en feuilles, de façon à définir entre elles un espacement. L'élément formant porte comprend un rouleau cylindrique qui comporte une pluralité de rainures annulaires s'étendant sur sa circonférence, et un anneau en élastomère disposé dans chaque rainure. La surface périphérique externe du rouleau comprend également une dépouille s'étendant axialement le long de sa longueur et positionnée de façon à être opposée à l'espacement, et les anneaux ont des dimensions leur permettant d'être apparents sur la partie de la surface périphérique externe définie par la dépouille. En fonctionnement, les courroies d'alimentation en feuilles font passer la feuille la plus basse par l'espacement sans l'amener en contact avec les anneaux apparents, et sans résistance de frottement notable, tandis que la feuille située immédiatement au-dessus de la plus basse entre en contact avec les anneaux, ce qui ralentit sa progression.

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