Mannesmann Aktiengesellschaft

Helmut Riesenegger

Gerhard Lohrmann

Gunther Engelhardt

A printer with a print-head distance-setting device for adjusting the distance (1) between print head (2) and print-material counter support (3) for recording-material carriers (4) of unequal thickness, resting on the print-material counter support (3), including a mechanical sensing member (5) for controlling a print head (2), adjustable in a direction perpendicular relative to the longitudinal direction of the slider carriage motion, where the print head (2) is disposed on a longitudinally movable print-head slider carriage (7), which print-head slider carriage (7) in turn is guided with a pair of parallel guide axles (9), of which one guide axle (9) is supported by way of a pair of eccentric-disposed pins (10) and of which the second guide axle (9) is cross-movably supported in the printer side walls (32). In order to achieve a simpler and more easily constructed print-head distance-setting device, which can in addition be controlled more accurately, an electrical analog signal, generatable by the setting motions of the sensing member (5), serves in a converted configuration of an electronic digital signal in an electronic circuit (11) for the control of a step motor (12), supported at a printer frame, where the step motor (12) forms a servo drive (13) for the pair of eccentric-disposed pins (10) of the guide axle (9).

Print-head positioning system having a paper sensor

A printer station (1) with output discharging device (3) for individual sheets (6) is in particular used for laser page printers. An outwardly directed output discharging device (3) follows to output roller pairs (5), as seen in transport direction (7) of the printed individual sheets (6). In order to dispose the output discharging device (3) in a space-saving fashion, and in order to create the possibility for the operator to adjust the output discharging device (3) to the local special situation, the output discharging device (3) is tiltably supported at the printer frame (4) of the printer station (1), where the output discharging device (3) is furnished with drivable friction roller pairs (13), disposed behind the output roller pairs (5), as seen in transport direction (7). The shafts (14, 15) of the friction roller pairs (13) are in each case rotatably supported at the side walls (8,9) of the tiltable output discharging device (3).

Printer station with output discharging device for individual sheets

A printed sheet delivery device (3) for a printing station (1) includes a collection tray (7) reciprocatable by a transverse-displacement drive (6) for receiving and sorting sheets (2) in stacked, printed-side-down relation in transversely staggered groups (4a). A housing (9) separate from and releasably securable to the printing station (1) is formed of a lower housing part (9a) within which the transverse-displacement drive (6) is mounted and an upper housing part (9b) that is contoured to define the collection tray (7). Slide guides (14a, 14b) carried on the bottom (13) of the upper housing part (9b) on both sides transverse to the direction (5) of sheet delivery cooperate with guide ledges (25, 26) on the lower housing part (9a) for guided transverse reciprocation of the upper housing part relative to the lower housing part.

Growing community of inventors

Elchingen, Germany

Helmut Riesenegger