US 4,059,409 AGranted

Apparatus for eliminating ammonia fumes emanating from diazo copiers

AssigneeBlu-Ray, Incorporated

InventorsRobert M. Barto, Loren E. Shelffo

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Abstract

Apparatus for the elimination of noxious ammonia fumes associated with diazo copiers includes a plenum chamber disposed about the output aperture of the machine developer chamber. Vacuum means are provided to draw the ammonia laden air out of this chamber. Preferably this apparatus is used in conjunction with a novel filter connected between the chamber and the vacuum means. The filter comprises a filter body of a material such as corrugated paper having a plurality of longitudinal substantially parallel channels, the walls of which are impregnated with a material, such as phosphoric acid, which will react with ammonia to generate odorless end products. A granular layer impregnated with such a material may be disposed in contact with the output end of this filter body.

Claims26

Dependent claims

Apparatus for eliminating noxious fumes emanating from equipment used for the development of sheetlike prints, such equipment having means to develop said prints including a developing tank, a guide surface extending outwardly from said developing tank along which such prints are expelled from the equipment, and a wall member spaced a predetermined distance from said guide surface to form an elongated output aperture for said prints, said apparatus including

an enclosure attached to said wall of said equipment so that it extends along and partially covers said output aperture, said enclosure including a first and second members each of which has at least one elongated side, and a first and second transverse ends, said first member having a portion which is spaced from said second wall of said equipment and extends toward said guide surface terminating in said one elongated longitudinal side of said first member which is adjacent to, but spaced from, said guide surface at a line spaced along said guide surface from said output aperture to form a first output slot, said first member having an aperture formed in said extending portion adjacent to said first end, and said second member extending substantially across said output aperture and terminating in said elongated longitudinal side of said second member which is adjacent to, but spaced from, said guide surface to form a second output slot, at least one end piece, said end piece being connected between the first transverse ends of said first and second members, and an elongated flexible member attached along said longitudinal side of said first member and extending across said first output slot to contact said guide surface;
a filter assembly including a filter body which is adapted to absorb said noxious fumes from air passing therethrough;
coupling means connected between said aperture in said first wall member and said filter means;
and
suction means adapted to draw air from said enclosure through said coupling means and said filter means.

2 more elements

Apparatus for eliminating noxious fumes emanating from the developing unit of equipment used to develop sheetlike prints, such developing unit including a developing tank having an aperture with opposed elongated sides, a roller having an elongated cylindrical surface which conveys said prints into and out of said developing tank, at least a portion of said roller extending through said aperture so that said surface passes through said tank and such equipment further including a guide surface extending away from said developing unit along which developed prints are expelled from the equipment, and a wall member spaced a predetermined distance from said guide surface to form an elongated output aperture for said prints, said apparatus including

first and second elongated flexible members attached respectively along said elongated sides of said developing tank aperture, each of said flexible members having a portion which extends into said developing tank aperture and contacts said elongated cylindrical surface of said roller to seal said fumes with said developing tank;
an enclosure attached to said wall of said equipment so that it extends along and partially covers said output aperture, said enclosure including a first and second members each of which has at least one elongated longitudinal side and a first and second transverse ends, said first member having a portion which is spaced from said second wall of said equipment and extends toward said guide surface terminating in said one elongated longitudinal side of said first member which is adjacent to, but spaced from, said guide surface at a line spaced along said guide surface from said output aperture to form a first output slot, said first member having an aperture formed in said extending portion adjacent to said first end, and said second member extending substantially across said output aperture and terminating in said elongated longitudinal side of said first member which is adjacent to, but spaced from, said guide surface to form a second output slot;
at least one end piece, said end piece being connected between the first transverse ends of said first and second members;
an elongated flexible member attached along said longitudinal side of said first member, said flexible member extending across said first output slot to contact said guide surface;
and
means to remove fumes escaping from said developing unit from said enclosure through said aperture in said member.

3 more elements

Dependencies are inferred from the claim text.