Abstract:
A self-closing door structure includes a frame, a door pivotally mounted on the frame, and an arm also mounted on the frame and pivoting between two stop positions. The first stop position corresponds to a closed position on the door and the second stop position corresponds to an opened position. The door structure additionally includes a spring coupled to the pivotal motion of the arm and acting upon the arm in the direction of the first stop position when the arm is located in a position between the first stop position and a dead center position of the spring. The arm has a driving element for coupling the motion of the door to that of the arm and is disposed for engaging with an engaging point of the door over the course of a closing motion of the door and for disengaging over the course of an opening motion.
Abstract:
A paper transport device in printers (1), particularly in dot matrix printers, for the feeding of continuous webs (6) by transversely displaceable tractors (7, 8) which are arranged in pairs on the printer frame. The tractor pins (9) engage into the edge perforations of the continuous web (6) and the pin belts (10) are guided over at least one wheel (11) of the tractor (7, 8) and at least one driven tractor wheel (13) is present. The device is equipped with a locking device so that the tractor (7, 8) operating as push means or as pull means is mounted in each case on a drive shaft (14) and in each case prevented from turning on the printer fram (1a) by a projection (16) on the side (15a) opposite the drive shaft (14) or by a swingable tractor flap (24).
Abstract:
A two-part cooling device including a heat-insulating housing and a cooling circuit including an evaporator, a compressor and a liquefier. The cooling device is subdivided into a first component including at least one housing and the evaporator and a second component including at least the compressor. The first and second components are separable and can be placed in a variable manner in relation to each other.
Abstract:
In a printer, a drive motor, a drive roller arranged on the shaft of the motor, a reversal roller in spaced relation to the drive roller, and an elongated drive belt trained about the drive and reversal rollers form a tensioning device, the belt being fastened at its ends to a print-head carriage for selectively displacing the carriage in the forward and reverse directions along and relative to a printable substrate support roller or base. The reversal roller is carried in a carrier housing which movably and cooperatively engages a spring-loaded tensioning wedge for maintaining the elongated drive belt in a predetermined tensioned or stretched relation. In order to avoid the need for a separate or specialized drive motor and an additional drive belt for advancing an inked printing ribbon, the drive force for the inked-ribbon drive shaft is derived from the reversal roller which, in the normal operation of the printer, is rotatable in opposite directions for selectively positioning the print-head carriage along the printable substrate support. For this purpose, a clutch member is interposed between the reversal roller and a gearwheel associated with the inked-ribbon drive shaft, the clutch member being longitudinally movable into coupled and uncoupled relations with the inked-ribbon gearwheel as a function of the direction of rotation of the reversal roller.
Abstract:
In a device for the paper transport of single sheets and/or continuous paper in office machines, in particular in matrix printers, there are provided in pairs and at least separately driven friction rolls (1, 2) which are disposed rotatably in side plates; the friction rolls exhibit a length to diameter ratio of from 30:1 to 50:1 and are therefore very long and very thin.In order to provide the friction force in a uniform manner over the entire length of the very long and thin friction rolls, it is disclosed that the positive running bending line (16) of a first feed roll (1) based on its support forces (14a, 14b) in the printer frame (15) and the negative running bending line (17) of a second friction feed roll (2) based on its support forces (14a, 14b) in the printer frame (15) are tuned to each other such that the two bending lines (16, 22) run approximately parallel.
Abstract:
An inner part for a refrigerating device, such as an inner wall, a refrigerating item support, or similar item ideally should be easy to clean. At least a surface of the inner part is provided with effective protection against microbes and/or fungi. Because the inner part inhibits the growth of microbes and/or fungi, it is easier to clean and maintain.
Abstract:
Apparatus for the selectably alternative feeding of single sheets and of endless webs of paper in a printer includes a guide roll (7), and first and second groups (8, 9) of friction rollers concurrently movable between first and second positions to define respective single sheet and endless web feeding modes of operation. In their first positions, the first friction rollers (8) contact the guide roll (7) to define a first single sheet feed channel (4) and the second friction rollers (9) contact the guide roll (7) to define a second single sheet feed channel (5). When shifted to their second positions, the first friction rollers (8) are displaced from their first position contact with the guide roll (7) to substantially eliminate the first single sheet feed channel (4), and the second friction roller (9) are lowered to form with the guide roll (7) an endless web feed channel (6).
Abstract:
The print substrate support (3) and longitudinal guides (4) for a print-head slider (7) are disposed in parallel at the invention printer. A controllable paper-guide drive motor (10) is furnished for the paper guide (9; 9a) and a drive motor (11) is furnished for the print-head slider (7). In order to be able to economically produce printers for different paper widths, and in order to eliminate problems of interfering radiation, a separated space (14) is furnished at the end of the paper guide (9; 9a) or respectively, of the longitudinal guide (4). At least one control-logic printed circuit board (15), an interface printed circuit board (16), the paper-guide drive motor (10) as well as the print-head-slider drive motor (11) are disposed in the separated enclosed space (14).
Abstract:
A device for the transport of multilayer, edge-perforated imprint-receiving substrates (8) takes into consideration a curve-shaped transport path (9), wherein a thrust tractor pair (5) is disposed in front and ahead of a substrate support (2), as seen in transport direction (10). Several friction roller pairs are following to the thrust tractor pair (5). In each case, a pulling force is transferrable by way of at least one friction roller. The multilayer imprint-receiving substrate (8) rests with its rear layer (8a) on the substrate support (2). A tearing of the edge perforations of the imprint-receiving substrate (8) as well as belly and bulge formations of one of the two layers (8a, 8b) is avoided by furnishing the push tractor (5) with a braking element (19) for the front layer (8b). A following first friction roller pair (11) rests with a driven friction roller (11a) at the front layer (8b). This friction roller (11a) performs a slightly smaller motion path per time unit relative to the counter friction roller (11b). However, the counter friction roller (11b), resting at the rear layer (8a), performs a slightly larger motion path relative to the tractor advance path.
Abstract:
A matrix printer is furnished with a matrix print head (1) supported on a back and forth movable slider (2), guided on a rail guide (3), wherein the print elements (4) can be operated at a high frequency. A matrix print head (1), disposed fixedly in its position relative to the slider (2), is furnished at least at one reference face (8) between the matrix print head (1) and the slider (2) with a sound-insulating layer (10) of an elastic material, and where the matrix print head (1) and the slider (2) can be braced and/or clamped to each other in this region. This construction opposes a sound formation and sound propagation via the print head, the slider (2) and the rail guide (3) by body sound conduction onto frame parts of the printer by employing sound-insulation and sound absorption.