Toyo Boseki Kabushiki Kaisha

Kosaku Onodera

Katsumasa Yamamoto

Masaru Nampei

Haruo Kubo

Takamitsu Ariki

Keizo Kawahara

Masaru Nanpei

Kyoichi Mizuno

A process for treating the periphery of an unexposed photosensitive resin plate, which comprises irradiation of light having a wavelength of not longer than 300 nm on the periphery of the unexposed photosensitive resin plate until the periphery is free of stickiness. The process of the present invention solves problems such as sticking of the peripheral resin of unexposed plates to packages, sticking of unexposed resin to a working table, exposure table or vacuum adhesion sheet, sticking of dust, and so on on the periphery of unexposed plates, and sticking of unexposed resin to hands when handling, while eliminating all defects in handling during the steps of making printing plates.

Process for treating periphery of unexposed photosensitive resin plate

Disclosed herein are a process and apparatus for developing photopolymer plates which are useful for flexographic printing on account of their rubber-like elasticity, capability for development by water washing, and good ink resistance. The process and apparatus are designed to circulate by force the washout solution during the development operation in order to minimize the aggregation of photopolymer particles suspending in the washout solution and to completely catch scum which occurs when the unexposed part of the polymer plate is rubbed off in the washout solution.

Process and apparatus for developing photopolymer plates

A continuous plate making method for a photosensitive resin plate which comprises setting the photosensitive resin plate on a surface of an endless belt or a setting plate which moves on a substantially circular orbit, and continuously subjecting the plate to, at least, washing out, drying and then post light exposure steps as the belt or the setting plate moves continuously. A device for carrying out this method is also disclosed.

Continuous plate making method for photosensitive resin plate and device

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Ohtsu, Japan

Kosaku Onodera