US 4,757,763 AGranted

Automatic blanket cylinder cleaner

AssigneeBaldwin Technology Corporation

InventorsJohn MacPhee, Charles R. Gasparrini, Karlheinz E. H. Arnolds

Life of this patent

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Abstract

An automatic blanket cylinder cleaner having a cleaner fabric adapted to contact the blanket cylinder. A cleaning cloth supply roller provides cloth for the cloth take-up roll. Positioned between these rolls is a water solvent dispensing tube, a solvent dispensing tube and an inflatable and deflatable mechanical loosening means which is adapted to move the cleaning fabric into and out of contact with the blanket cylinder. An air dryer means dries the blanket cylinder after the cleaning of debris. An advancing means advances the cleaning cloth intermittently onto the take-up roller by a control means in contact with the take-up roll which provides for uniform cloth advance during the cleaning cycle. There is a control means providing automatic and manual control.

A device for cleaning the rotating blanket cylinder of a paper printing press with a volatile solvent, said device being of the type including means for feeding cloth fabric and a cloth fabric take-up roll, wherein the paper drying is caused by the application of heat to cause evaporation of solvent so that the device is particularly adapted for a heat set process, said device including:

(a) a frame adjacent the ends of a rotating blanket cylinder;
(b) a mechanical loosening means mounted on said frame adjacent said blanket cylinder and extending substantially the length thereof;
(c) said mechanical loosening means including a non-woven absorbent fabric adapted to form a strip of substantial width and to engage said rotating blanket cylinder to remove lint and hickeys from said blanket cylinder along the length thereof, means for metering a solvent onto said non-woven fabric prior to engagement with said rotating blanket cylinder.
(d) non-absorbent, non-rotating means for causing said wetted fabric to move into cleaning engagement with said blanket cylinder and for maintaining the amount of solvent applied to said fabric, said non-absorbent means being free from solvent so as to not disturb the amount of solvent applied to said fabric and limit the amount supplied by the solvent feeding means thereby limiting the amount of solvent vapor, said non-absorbent means including a non-absorbent inflatable and expandable bladder member adapted to directly engage said fabric to move said fabric into engagement with said blanket cylinder without applying additional solvent to said fabric thereby limiting the volume of solvent on said fabric and to conform the fabric to said blanket surface;
(e) means for pneumatically inflating and expanding said bladder member so that said bladder moves said non-woven absorbent fabric into direct engagement with said blanket cylinder to loosen debris thereon, and means for deflating said bladder so that said bladder contracts and disengages said fabric from said blanket;
and
(f) means for controlling the supply of air to said expandable bladder means to periodically inflate and deflate said bladder.

4 more elements

Facts

Application

07/022,485Filed 6 Mar 1987 · continuation

Priority

19 Apr 1979

Granted

19 Jul 1988

Term ends

Not estimatedThe source records don’t support an estimate.

Classification5 codes

B41F 35/06
Cleaning arrangements or devices: for offset cylinders
B41P 2235/242
Using rolls of cleaning cloth: unwinding the cleaning cloth
B41P 2235/246
Using rolls of cleaning cloth: pressing the cleaning cloth against the cylinder
B41F
Printing machines or presses

Family

Serial31,511Parent of this division · filed 19 Apr 1979

Serial377,162Parent of this continuation · filed 11 May 1982

Serial647,482Parent of this continuation · filed 5 Sep 1984

US 4,344,361 AParent of this division

US 4,757,763 AThis patent

From the US filing history. Foreign family members aren’t listed.

Abstract

Claims6