Method and arrangement for eliminating ammonia vapors from devel

Details Method and arrangement for eliminating ammonia vapors from devel Method and arrangement for eliminating ammonia vapors from devel

1979-05-07

1981-06-16

Hix, L. T.

Photocopying

Contact printing

Light boxes

354300, 34 37, 355106, G03D 700

Patent

active

042734355

ABSTRACT:
A method and arrangement for achieving a thorough degassing of developed diazo copy materal to eliminate the ammonia vapors permeating the developed diazo copy material as a result of the development process. The developed copy is moved from a development chamber containing the developing vapors into a degassing chamber, where the developed copy material is passed over a heated surface in intimate contact therewith to drive out the ammonia from the copy material. The ammonia vapors are carried away by a suction pump or fan to an external ammonia absorbing canister. In a first version, the heated contact surface is provided by a heated tube about which the developed print is drawn after passing off a developer-drive cylinder. In a second version, the developer-drive cylinder moves the developed copy material past a longitudinal seal engaging the drive cylinder, with the region on one side of the seal comprising a heated development chamber, while the region on the other side of the seal is subjected to a suction to evacuate the ammonia vapors. A heated, trough-shaped steel metal guide is positioned to receive and guide the developed copy material out of the machine to augment the degassing effect provided by contact with the heated developer-drive cylinder in the region subjected to suction.

REFERENCES:
patent: 1760149 (1930-05-01), Langsner
patent: 2058983 (1936-10-01), Horn
patent: 3027822 (1962-04-01), Frantz
patent: 3177793 (1965-04-01), Stewart
patent: 3915708 (1975-10-01), Zausmer et al.
patent: 4056824 (1977-11-01), Iiyama et al.
patent: 4092658 (1978-05-01), Schroter
patent: 4109268 (1978-08-01), Schroter et al.
patent: 4143969 (1979-03-01), Oddo

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