Developing system for bore matrix
AssigneeJarfalla Digital Filter Printer AB
InventorPer Sundström
Life of this patent
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Abstract
A developing system for a bore matrix in a printer using toner in the form of a dry toner powder, and comprising a feeder brush (3) which receives toner from a toner container (1), a printer brush (5) receiving toner from the toner feeder brush (3) and transporting same through bores of a bore matrix (8) and down to a document (9) to be printed, and means (15) for charging the toner particles by mechanically rubbing the toner particles (2) against the printer brush (5), and in which a means (19) may be provided for ripping free the charged toner particles (2), so that said particles form a cloud (7) of charged toner particles (2) adjacent the bore matrix (8), which pass down to the document (9) to be printed through open bores of the bore matrix (8).
Claims12
A developing system for a bore matrix in a printing apparatus, in which toner in the form of a dry powder is transported from a toner container down onto a document to be printed, and comprising a feeder brush which receives toner from the toner container and which transports said toner to a printer brush and further through bores of a bore matrix down onto the document to be printed, characterized in that the toner particles are being charged in that the toner particles are being mechanically rubbed against the printer brush using charging ridges arranged on a wall adjacent the printer brush, and further comprising means provided closely in advance of the bore matrix, as seen in the direction of rotation of the printer brush, for ripping free the charged toner particles by having the brush fibers naturally oscillate thereby providing a cloud of charged toner particles adjacent the bore matrix.
Dependencies are inferred from the claim text.