US 4,905,596 AGranted

Combined cleaning and safety device for printing cylinder

AssigneeMAN Roland Druckmaschinen AG

InventorIngo Kobler

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Abstract

To provide a cleaning arrangement which includes brushes brushing against the surface of a rubber blanket or other printing cylinder, to remove lint, dust, dirt and other contaminants therefrom a strip of brushes (9), preferably backed up by a suction pipe (8) to remove lint from the surface of the cylinder and from the brushes, is located inwardly of the finger guard strip (6) which is provided in advance of the nip between rotating cylinders as a safety measure. The cleaning elements, that is, brushes (9) and suction tubes (8), if provided, are located inwardly, with respect to the nip, of the safety guard or safety rail (6) which, typically, has angled or essentially in cross section part-circular, typically semi-circular shape. The safety guard is usually supported by levers (11) or slidably supported in the printing machine, to be placed out of position from the nip when the machine is stopped. The cleaning elements, that is brushes and suction tube, if provided, move with the safety rail to provide access to the nip between the cylinders when the machine is stopped. The cleaning structure does not require additional space or holding elements in the machine since the holders (11) for the safety guard rail (6) likewise support the cleaning elements (8, 9).

Claims17

Dependent claims

A printing machine having

two cylinders (3, 13) which, in operation, are engaged towards each other and define a nip between said cylinders, and an essentially triangular entry zone (19, 20) adjacent the nip,
said printing machine comprising the combination of
a line removal and cleaning apparatus for continuously, during operation of the printing machine and rotation of the cylinders (3, 13), removing lint and for cleaning at least one of the cylinders with
a protective safety strip (6) located in advance of said entry zone (19, 20);
wherein said protective safety strip comprises
an axially extending element defining a concave surface and having lateral portions which, when the safety strip (6) is in position, are located close to the circumference of the cylinders (3, 13) to prevent accidental entry into said entry zone (19, 20) of an operator's fingers or of objects;
and
means (11) for retaining said safety strip (6) in position in advance of the nip when the machine is in operation, with said concave surface facing said nip;
wherein said lint removal and cleaning apparatus comprises
an axially extending cleaning means (8, 9) located in said entry zone inwardly of said concave surface and coupled to the safety strip (6), whereby said lint removal and cleaning apparatus will be located between the safety strip and said nip.

7 more elements

Dependencies are inferred from the claim text.