Device for wet coating, in particular printed circuit...

Coating apparatus – Solid applicator contacting work – Movably mounted applicator

Reexamination Certificate

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Details

C118S104000, C118S203000, C118S249000

Reexamination Certificate

active

06210480

ABSTRACT:

BACKGROUND OF THE INVENTION
1. Technical Field
The invention relates to a device for wet coating, in particular printed circuit boards, with lacquer by means of at least one application roller, leaving at least one edge area of the printed circuit board free and employing a doctor blade arrangement.
2. Prior Art
Such an arrangement is known from DE-GM 85 03 321, it is essentially used to obtain a lacquer-free gripping edge in multi-layer printed circuit boards which are coated on one or both sides, in particular with variable coating widths, in the course of a rolling method. A more detailed description of this problem can also be found in DE-PS 44 17 518.
The doctor blade arrangement in accordance with the first-mentioned utility model consists of two independent strippers, which leave the problem of what to do with the lacquer stripped off in the area of the circumference of the roller. If no reasonable solution is provided for this, this known solution can lead to accumulations of lacquer at undesired places, soiling, and interference with the operation of the entire device.
BRIEF SUMMARY OF THE INVENTION
The essential object of the invention therefore is to further develop such doctor blade arrangements in such a way that they can be adapted to modern roller designs (cyclical processes) and permit the controlled displacement of the lacquer from the circumferential area of the application roller.


REFERENCES:
patent: 2102984 (1937-12-01), Von Hofe
patent: 2593074 (1952-04-01), Trist
patent: 3568636 (1971-03-01), Lockwood
patent: 3995585 (1976-12-01), Schuurmans
patent: 4135475 (1979-01-01), Bomers
patent: 5518573 (1996-05-01), Schulz
patent: 32 18417 (1983-01-01), None
patent: 85 03 321 (1985-05-01), None
patent: 3621 417 (1987-08-01), None
patent: 42 04 403 (1993-09-01), None
patent: 44 17 518 (1995-07-01), None
patent: 83/01636 (1983-05-01), None
Patent Abstracts of Japan, vol. 6, No. 129 (P-128), Jul. 15, 1982 for JP 57 053776 A (Ricoh Co. Ltd.), Mar. 30, 1982, Recleaning Device of Copying Machine.
Patent Abstracts of Japan, vol. 7, No. 038 (P-176), Feb. 16, 1983 for JP 57 191672 (Canon KK), Nov. 25, 1982, Blade Type Cleaning Device on Surface of Image Holding Member of Picture Forming Device.

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