EP 0177637 B1 19880427 - BRONZE PRINTING PROCESS FOR COLOUR PRINTS TREATED WITH A BRONZING MEDIUM
Title (en)
BRONZE PRINTING PROCESS FOR COLOUR PRINTS TREATED WITH A BRONZING MEDIUM
Publication
Application
Priority
- EP 84113757 A 19841114
- DE 3321953 A 19830618
Abstract (en)
[origin: EP0177637A1] 1. Method for the bronzing of colour printing by treatment with bronzing medium, using non-flowable lustre pigments, consisting of mica flakes coated with titanium dioxide, which on the TiO2 layer have a thin colouring layer of annealed chromium dioxide and/or chromium phosphate, characterized in that the lustre pigment is converted into the flowable state, it emerges along the length of the application roller (1) out of the bronzing pigment container (2) situated thereabove which container is brought down so low as to be disposed, viewed in cross-section, with its vertical wall face (4) and its wall face (5), which is inclined, on the rotating surface of the application roller (1), the lower limit of this being the height of the horizontal diameter (6) through the axis of the application roller (1), and thereby the bronzing lustre pigment of light specific weight forms a wedge-shaped volume of bronzing medium from which the flow is carried over the surface of the application roller (1), controlled by adjustable sliders (3, 3a ... 3n), to the gap opening (13) of the sliders (3, 3a ... 3n), and wherein said bronze wedge (7), viewed in cross-section, is bounded by the upper circular roller arc section (8) between the inclined wall face and the uppermost point on the application roller (1), the inclined wall face (5) and the tangent (9) to the uppermost point on the application roller, wherefrom the outflow occurs, through the flow angle (10) of 458 which, viewed in cross-section, is defined by the vertical wall face (4) and the line (11) to the uppermost point (12) of the application roller (1) from the outer point (13) on the application roller (1), continuously and evenly in a specific quantity such that the printed sheets receive a predetermined coverage, after which the non-adhering quantity of the lustre pigment is removed from the bronzed printed sheets by brushing off, the bronzed printed sheets are carried out and stacked and the lustre pigment which has been brushed off is introduced into a collection vessel.
IPC 1-7
IPC 8 full level
B41G 1/04 (2006.01); B41M 1/22 (2006.01); B44C 1/04 (2006.01)
CPC (source: EP)
B41G 1/04 (2013.01); B41M 1/22 (2013.01); B44C 1/04 (2013.01)
Designated contracting state (EPC)
AT BE CH DE FR GB IT LI LU NL SE
DOCDB simple family (publication)
DE 3321953 A1 19841220; DE 3321953 C2 19890112; EP 0177637 A1 19860416; EP 0177637 B1 19880427
DOCDB simple family (application)
DE 3321953 A 19830618; EP 84113757 A 19841114