Extrusion-type coating head for coating a magnetic recording med

Details Extrusion-type coating head for coating a magnetic recording med Extrusion-type coating head for coating a magnetic recording med

1990-02-07

1991-12-17

Wityshyn, Michael

Coating apparatus

Immersion or work-confined pool type

Work-confined pool

118325, 118419, 118DIG4, 4251335, B05C 502, B05C 906

Patent

active

050726889

ABSTRACT:
A coating method and an extrusion-type coating head in which turbulence at the junction between two flows of coating materials is prevented to provide multi-layer simultaneous coating over a wide range of coating rates and with a good coating quality. An intermediate block is sandwiched betwen a rear block defining a back edge and a front block defining a doctor edge. Two coating flows pass through slits formed on either side of the intermediate block, joining at the top end of the intermediate block and flowing together into a short slot extending between the end of the intermediate block and the outlet of the head.

REFERENCES:
patent: 2761791 (1956-09-01), Russell
patent: 2901770 (1959-09-01), Beck
patent: 2932855 (1960-04-01), Bartlett et al.
patent: 3508947 (1970-04-01), Hughes
patent: 3611492 (1971-10-01), Scheibling
patent: 4094947 (1978-06-01), Alfrey, Jr. et al.

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