Printing – Intaglio – Processes
Patent
1994-08-02
1995-05-30
Burr, Edgar S.
Printing
Intaglio
Processes
101150, 101122, B41M 110
Patent
active
054192463
ABSTRACT:
A method for laying down a continuous, predetermined pattern of granular material upon a moving substrate includes moving the substrate past at least two stations, each station including a rotating drum with a drum wall defining a limited retention region under vacuum, and a plurality of through-apertures arranged in an element of the desired pattern. Granular material applied to the surface of the drum is held by vacuum in the desired pattern. After removal of excess granular material, the vacuum is discontinued causing the granular material to disengage from the drum surface and pass, by force of gravity, onto the surface of the substrate in the form of the predetermined element of the desired predetermined pattern. An apparatus for laying down a continuous, predetermined pattern of granular material upon a moving substrate is also described.
REFERENCES:
patent: 3245341 (1966-04-01), Childress et al.
patent: 3285168 (1966-11-01), Childress
patent: 3566786 (1971-03-01), Kanfer
patent: 4157652 (1979-06-01), Mathes et al.
patent: 4539908 (1985-09-01), Spengler
patent: 4697514 (1987-10-01), George et al.
patent: 4800102 (1989-01-01), Takada
patent: 5065675 (1991-11-01), Tapper
patent: 5213042 (1993-05-01), Larios
Burr Edgar S.
Yan Ren
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