Abstract:
Electrophotographic copying apparatus has charging, imaging, transferring, precleaning, and erasing facilities in a conventional sense but incorporates a combined developingcleaning unit that is operable to perform either function at the proper time during the copying sequence. A first version incorporates a photoconductor drum structure surrounded with the necessary electrophotographic elements including a single magnetic brush developer-cleaner unit, the drum structure preferably having an odd number of image areas, such as three. Another version incorporates a photoconductor belt also having provision for an odd number of image areas and movable past the stations. For single copy operation, alternate image positions are used for copying with cleaning occurring on the positions between. With the operator changing masters, this delay is not noticeable. With an automatic document feeder, the throughput rate is half of the continuous copy rate. For continuous copy, every image position is used and cleaning is suspended until the end of the run at which time a full cycle cleaning operation is initiated. If the run is long and the copy degrades, intermediate cleanup cycles can be included as often as necessary. Conveniently, a magnetic brush element forms a contacting surface for conveying toner onto the photoconductor surface during developing and away from the photoconductor surface during cleaning. Appropriate changes in biasing of the brush are made during operation.
Abstract:
ELECTRIC FIELD ORIENTATION FOR INK JET PRINTERS FOR VERTICAL AND HORIZONTAL PRINTING Disclosed is an ink jet printer having the capability of printing both vertically and horizontally. This is accomplished by mechanical orientation of the electric field associated with the deflection plates. In a first embodiment, the plates are mounted in such a manner as to permit rotation manually, for example, by a handle which interconnects the two plates and permit rotation thereof about the axis of the ink drop stream. In an alternate embodiment, the deflection plates are comprised of two pairs, a horizontal pair and a vertical pair which are shiftable into and out of operating position to effect the desired ink drop deflection. LE9-77-007
Abstract:
Electrophotographic copying apparatus has charging, imaging, transferring, precleaning, and erasing facilities in a conventional sense but incorporates a combined developing-cleaning unit that is operable to perform either function at the proper time during the copying sequence. A first version incorporates a photoconductor drum structure surrounded with the necessary electrophotographic elements including a single magnetic brush developer-cleaner unit, the drum structure preferably having an odd number of image areas, such as three. Another version incorporates a photoconductor belt also having provision for an odd number of image areas and movable past the stations. For single copy operation, alternate image positions are used for copying with cleaning occurring on the positions between. With the operator changing masters, this delay is not noticeable. With an automatic document feeder, the throughput rate is half of the continuous copy rate. For continuous copy, every image position is used and cleaning is suspended until the end of the run at which time a full cycle cleaning operation is initiated. If the run is long and the copy degrades, intermediate cleanup cycles can be included as often as necessary. Conveniently, a magnetic brush element forms a contacting surface for conveying toner onto the photoconductor surface during developing and away from the photoconductor surface during cleaning. Appropriate changes in biasing of the brush are made during operation.
Abstract:
992,171. Controlling friction clutches. INTERNATIONAL BUSINESS MACHINES CORPORATION. Jan. 10, 1963 [Jan. 10, 1962], No. 1173/63. Headings F2C and F2L. [Also in Divisions B6, G2 and G5] A sprocket 12, Fig. 5 (not shown), in web feeding apparatus (see Division B6) is mounted on a shaft 100, Fig. 6, driven through a spring clutch 104. A solenoid 106, when energized, swings a clutch lever 108 about a pivot 110 to engage the clutch 104. A bifurcated lever 112, pivoted at 114, carries a pin 116 which engages the teeth 120 of a ratchet wheel 118 on the shaft 100 under a spring bias 122. Another pin 124 carried by the lever 112 engages the clutch lever 108 to disengage the pin 116 when the spring clutch 104 is engaged. Mounted on the bed 2 of the apparatus is a solenoid 126, Figs. 6, 7, operative when energized to swing a hooked-shaped lever 128 about a pivot 130 from a position (Fig. 7) in which the swing of the clutch lever 108 is limited to allow only the disengagement of the pin 116 from the teeth 120, to a position clear of the path of the clutch lever 108 to allow disengagement of the pin 116 and engagement of the clutch 104. When the web reel is placed on the winding hub of the apparatus, a switch 76, Fig. 10, is closed. Closing manual switch 132 will energize solenoids 126 and 106 through the normally closed switch 90, thus engaging the clutch 104. A clutch mechanism 40, Fig. 8, applies a continuous torque either high or low depending upon the condition of the clutch mechanism which tends to wind up the web reel when in position on the hub. The clutch mechanism includes two clutch springs 42 and 43 which when engaged cause the shaft 14 to be driven with a high torque from the constantly driven shaft 41. A pin 44 extends through a hole in a ring 45 and engages the clutch spring 43. The ring has, a crown of teeth 46 coacting with a detent 47, Fig. 9, normally biased to engagement by a spring 48. In this condition, the ring is stopped and the spring 43 is expanded and released. The shaft 14 then has only a low torque applied thereto through the spring 42. A solenoid 49 when energized, retracts the detent 47 which causes the spring 43 to engage and the shaft 14 to have a high torque applied thereto. With the switch 160, Fig. 12, held closed the circuit is completed through the solenoid 49 and normally close switch 92 thereby applying a high torque to the web reel.