Photocopying – Contact printing – Light boxes
Patent
1989-12-12
1991-04-09
Braun, Fred L.
Photocopying
Contact printing
Light boxes
141364, 222DIG1, 355260, G03G 2100
Patent
active
050068946
ABSTRACT:
A dust containment cap for use in a printing device to be supplied with finely pulverized toner which is susceptible of becoming airborne and contaminating surrounding areas employs two brushes arranged in the toner supply opening such that they completely fill the opening but permit the insertion of the neck of a toner bottle to be inserted through them for depositing new toner. Toner that becomes airborne below the brushes is impeded by the brushes from escaping from the opening. The brushes may be installed at downward angles so that together they form a "V"; toner inadvertently spilled on the tops of the brushes gravitates to the bottom of the "V" whence it may be dropped through by agitating the bristles.
REFERENCES:
patent: 4237943 (1980-12-01), Ermel et al.
patent: 4373468 (1983-02-01), Suda et al.
patent: 4492321 (1985-01-01), Zoltner
patent: 4634071 (1987-01-01), Hertel
Canham Randolph S.
McGehee Danny B.
Morris Scott S.
Braun Fred L.
Bull HN Information Systems Inc.
Clapp Gary D.
Solakian John S.
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