Browse Prior Art Database

Toner Feed Roll

IP.com Disclosure Number: IPCOM000048865D
Original Publication Date: 1982-Apr-01
Included in the Prior Art Database: 2005-Feb-09
Document File: 2 page(s) / 33K

Publishing Venue

IBM

Related People

Dang, CH: AUTHOR [+6]

Abstract

Efforts to generate darker print on an existing printer demanded that more toner be deposited on the paper. The replenisher currently used was unable to meet the demand of increased toner. First, the flutes machined in the replenisher roll were of insufficient volume to supply toner even when the replenisher was operated continuously. Also, toner would lodge in the flutes and not drop into the developer as the roll rotated.

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Toner Feed Roll

Efforts to generate darker print on an existing printer demanded that more toner be deposited on the paper. The replenisher currently used was unable to meet the demand of increased toner. First, the flutes machined in the replenisher roll were of insufficient volume to supply toner even when the replenisher was operated continuously. Also, toner would lodge in the flutes and not drop into the developer as the roll rotated.

To overcome these problems a new replenisher system was devised, as illustrated in the figures. This design utilizes a molded plastic feed roll and formed metal lips to move larger volumes of toner and effectively dislodge it from the roll into the developer.

As the ribs on the replenisher roll are brought into contact with the formed metal lip, they fold back. In passing over the raised rib in the formed metal lip, the roll ribs are flexed back even more. As the roll rotates further, the roll ribs snap to an erect position again, positively dislodging the toner from between the ribs.

In the existing version of this replenisher, the roll is made by injection molding a thermoplastic urethane over a steel core. The formed metal lips are sheet steel. Numerous substitutes could be made in

With this invention relatively large quantities of toner can be transported by, and positively released from, the roll without being subjected to pressure high enough to cake it. Also, the roll is relatively inexpensive and does not need to be hel...