Bridge mandrel for flexographic printing systems

B - Operations – Transporting – 41 – F

Patent

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Details

B41F 13/10 (2006.01) B41F 5/24 (2006.01) B41F 13/11 (2006.01) B41F 27/10 (2006.01) B41N 10/06 (2006.01)

Patent

CA 2399718

A bridge mandrel is provided which is simple to manufacture, light weight, and easy to mount and dismount from underlying printing cylinders in flexographic and gravure printing systems. The bridge mandrel (10) includes a generally hollow, cylindrically-shaped tube adapted to fit over a print cylinder (12). A channel (38) extends substantially around the circumference of the inner surface (100) of the tube, and a plurality of orifices (40) extend generally radially outwardly from the channel to the outer surface (102) of the tube. The channel and orifices permit pressurized air to be provided from the interior of the mandrel to its surface for the mounting of a print sleeve (16) onto the mandrel. In one embodiment, the bridge mandrel includes a locking mechanism (20) which is adapted to engage a pin (22) on the print cylinder to prevent movement of the mandrel during printing operations.

La présente invention concerne un mandrin en pont simple à fabriquer, léger, et facile à monter et à démonter dans les cylindres d'impression sous-jacents des systèmes d'impression flexographique et par héliogravure. Ce mandrin en pont (10) comprend un tube cylindrique généralement creux conçu pour s'ajuster dans un cylindre d'impression (12). Un canal (38) s'étend sensiblement autour de la circonférence de la surface interne (100) du tube, une pluralité d'orifices (40) s'étendant généralement de manière radiale vers l'extérieur du canal, en direction de la surface extérieure (102) du tube. Le canal et les orifices permettent de fournir de l'air sous pression de l'intérieur du mandrin à sa surface pour le montage d'un manchon d'impression (16) sur le mandrin. Dans un des modes de réalisation, le mandrin en pont comprend un mécanisme de verrouillage (20) conçu pour venir en prise avec une broche (22) sur le cylindre d'impression, afin d'empêcher le mandrin de bouger au cours de l'impression.

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