(19)
(11) EP 0 197 493 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
30.09.1987 Bulletin 1987/40

(43) Date of publication A2:
15.10.1986 Bulletin 1986/42

(21) Application number: 86104449

(22) Date of filing: 01.04.1986
(84) Designated Contracting States:
BE CH DE FR GB IT LI

(30) Priority: 01.04.1985 CN 85100851

(71) Applicant: Zhongjun, Wang
 ()

(72) Inventor:
  • Zhongjun, Wang
     ()

   


(54) Vertical drawing curtain coating method and apparatus


(57) This invention develops a new kind of vertical drawing curtain coating method and apparatus, which contains three main parts: a higher uniform equal-flow distributing coater, a vertical drawing short-curtain, a parallel rotated coating roller and moving webs. This coating method can simultaneously coat one or more than one layer with high uniformity, and is suitable for silver salt or non-silver salt photo-sensitive materials production. It can use a liqud viscosity from 2 to 1,000 mPas at a coating velocity 30 to 300 mm/in to get a coating weight from 20 to 240 ml/m2; and can avoid coating defects such as those usually found in the bead coating and vertical free-falling curtain coating methods.







Search report