Inking unit

B - Operations – Transporting – 41 – F

Patent

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101/105

B41F 31/10 (2006.01) B41F 31/00 (2006.01) B41N 7/06 (2006.01)

Patent

CA 2019899

A cut down, column-free inking unit suitable for use in rotary presses, comprising an ink fountain possessing a plate , a doctor blade, a steel fountain cylinder and a steel ductor cylinder that can be adjusted relative to the latter, an application cylinder, a distributing cylinder and a transfer cylinder engaging with application cylinder, a smoothing cylinder, a helical cylinder serving the return of ink to the ink fountain, said helical cylinder comprising worm grooves running from the inside to the outside of such cylinder, as well as end disks that mesh with outside rings of fountain cylinder. The design of fountain, ductor and application cylinders with respect to circumference and circumferential speed is such that the speed relationship existing between all three cylinders is 1:0.2:2.5.

Cette invention concerne une unité d'encrage modifiée sans colonne adaptée aux presses rotatives, qui comprend un encrier équipé d'une plaque, d'un docteur, d'un cylindre d'encrier en acier et d'un cylindre preneur réglable par rapport à ce dernier, d'un cylindre applicateur, d'un cylindre distributeur et d'un cylindre de transfert en prise avec le cylindre applicateur, un cylindre de lissage et un cylindre à gorges hélicoïdales de renvoi de l'encre excédentaire vers l'encrier, ledit cylindre à gorges hélicoïdales ayant ses gorges en vis sans fin partant de son centre vers ses extrémités ainsi que des flasques qui engrènent avec les couronnes dentées du cylindre d'encrier. Le cylindre d'encrier, le cylindre preneur et le cylindre applicateur ont une circonférence et une vitesse périphérique calculées pour un rapport de vitesses s'établissant à 1:0.2:2.5.

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