Abstract:
A multiple roller belt assembly module arrangement for an electrostatic printing machine of the type employing an endless photoconductive belt. The arrangement supports the module in cantilever fashion using two horizontally protruding shafts one of which is rotatably driven and connected to one roller for driving the belt and the other being fixed. Centering and locking means are provided for aligning the belt assembly upon the shafts during mounting of the assembly to a fixed machine support.
Abstract:
An arrangement of a planar positioning means in an electrostatic printing machine of the type employing a flexible photoconductive member, such as a belt or web. The machine is provided with locating pins in the image plane for the machine and against these pins, a vacuum holddown device is yieldably maintained. The belt or web is held against the holddown device during movement of the belt or web thereby being continuously held within the image plane. Means are provided for the movement of some of the locating devices for permitting removal or insertion of the belt or web without danger thereto.
Abstract:
A BELT TRACKING ARRANGEMENT FOR USE WITH A BELT SUPPORTING ROLLER IN A BELT EMPLOYING AT LEAST THREE ROLLERS WHEREIN THE SHAFT FOR THE ROLLER IS MOUNTED FOR SHORT PIVOTAL MOVEMENT ABOUT A CONTROL AXIS NORMAL TO ITS AXIS AND WHICH LIES IN A PLANE THAT BISECTS THE ANGLE OF THE BELT RUNS ON EITHER SIDE OF THE ROLLER. THE ROLLER SHAFT IS MOUNTED BETWEEN THE LEGS OF A YOKE WHICH HAS ITS AXIS OF ROTATION IN COINCIDENCE WITH THE CONTROL AXIS.
Abstract:
In an electrostatic reproducing machine, a latent electrostatic image is formed and developed on a photoreceptor belt and transferred to a copy sheet at a transfer station where a transfer roller is mounted to be in contact with the photoreceptor belt. Suitable means are provided for engaging the transfer roller into a position to be in contact with said photoreceptor belt when the machine is in operation and disengaging the transfer roller and moving it away from the photoreceptor belt so that the transfer roller does not touch the photoreceptor belt when the machine is not in operation. A brush roller may be provided for removing the residual toner particles remaining on the transfer roller and means may be provided for vacuuming the transfer roller and vicinity.
Abstract:
An electrostatic reproduction machine has a belt assembly having an endless photoconductive belt mounted thereon for movement around a closed path. The machine also has a fail-safe mechanism for stopping the movement of the belt in the event the tracking thereof becomes irregular and uncontrollable. This mechanism converts lateral movement of the belt into rotary movement so as to open (or close) either of two mercury switches to stop the belt movement, the switches being mounted so that their positions with respect to the remainder of the mechanism and the belt assembly can be adjusted in accordance with position of a sensing rod with respect to the remainder of the mechanism after the belt assembly is initially moved into its operative position.
Abstract:
A web sensing mechanism for use with the edge of a moving web to sense its deviation from a desired predetermined path of movement. The mechanism includes a ring formed with a tapered inner edge engageable with the sensed edge of the web and which is arranged generally concentric with the axis of a roller around which the web is guided. The ring is mounted for rotation on the end of a control lever which actuates means for correcting the web deviation.
Abstract:
A vacuum and electrical connecting arrangement for an electrostatic printing machine of the type employing a belt assembly module which is adapted to be mounted and dismounted in the machine. The belt module is equipped with a vacuum conduit connection device which can be attached to and detached from a mating device mounted on a fixed frame of the machine. There is also a metallic brush on the frame serving as an electrical connecting device for the conductive belt substrate. Both the vacuum connection and the electrical connection are made automatically when the assembly is inserted into place.
Abstract:
A roller retraction mechanism for a belt assembly module of the type employing an endless photoconductive belt around a plurality of rollers. One of the rollers is mounted for rotation in a yoke which is pivotally mounted on an axis normal to its axis of rotation, and a toggle leakage arrangement is connected to the yoke for relatively moving the yoke axially along said pivotal axis.
Abstract:
REPRODUCTION MACHINE FUSER A fuser apparatus for a reproduction or copying machine, the fuser comprising a heated fixing roll and cooperating pressure roll which together form a nip between which the copy material being fused passes. One or more stripper fingers at the fuser exit cooperate with the fuser rolls to prevent the copy material from sticking thereto. To obviate uneven or spot wear on the fuser roll surface, which may result from contact of some operative element, such as the stripper fingers, or a temperature sensor, or from the copy material itself thereagainst, the fuser roll is supported for limited axial displacement relative to the pressure roll. Such fuser roll support is obtained through a movable roll bearing structure, which includes a bearing lock to retain the bearing structure and the fuser roll itself in a selected axial position.