Abstract: An automatic document feeder includes a driving wheel, a clutch unit, and a plurality of roller units. The clutch unit is disposed in a housing unit, and includes a first wheel driven by the driving wheel, a second wheel for driving the roller units, a resilient member interposed between the first and second wheels for biasing the second wheel to move away from the first wheel, and a driving rod. The driving rod is movable between a connecting position whereat the second wheel engages the first wheel so as to allow for transfer of rotation between the first and second wheels, and a disconnecting position whereat the second wheel is disengaged from the first wheel so as to prevent transfer of rotation between the first and second wheels.

Abstract: A driving apparatus of a multi-function machine includes a scanner unit scanning data recorded on a sheet of document and a document transport part to transport the sheet of document. A printer unit prints data on a sheet of paper for an output and includes a carrier including a print head with an ink jet nozzle mounted thereon to carry out the printing operation by moving the print head. The driving apparatus includes a driving motor, a scanner driving part driving the scanner unit, a printer driving part driving the printer unit, and a power switching part disposed with the driving motor, the scanner driving part, and the printer driving part. The power switching part selectively transmits a power of the driving motor to at least one of the scanner driving part and the printer driving part.

Abstract: A driving apparatus of a multi-function machine includes a scanner unit scanning data recorded on a sheet of document and a document transport part to transport the sheet of document. A printer unit prints data on a sheet of paper for an output and includes a carrier including a print head with an ink jet nozzle mounted thereon to carry out the printing operation by moving the print head. The driving apparatus includes a driving motor, a scanner driving part driving the scanner unit, a printer driving part driving the printer unit, and a power switching part disposed with the driving motor, the scanner driving part, and the printer driving part. The power switching part selectively transmits a power of the driving motor to at least one of the scanner driving part and the printer driving part.

Abstract: A mechanism for selectively switching two drive transmission systems by one driving source is provided and a rocking lever which can be rocked between a first drive transmission gear of a first drive transmission system and a first drive transmission gear of a second drive transmission system respectively located on both sides of a drive shaft is provided. A rocking gear located between both drive transmission gears and selectively engaged with both drive transmission gears for transmitting driving force from the driving source is attached to the rocking lever and a locking means mocks the rocking lever in a state that the locking means is engaged with either of the both drive transmission gears. The first drive transmission system and the second drive transmission system are connected to a drive unit normally and reversely rotated. At least one flat side is formed in the above locking means and a flat side which can come in contact with the flat side of the locking means is formed in a fitting part.

Abstract: An image printer comprising: a printing member for printing dye on a recording medium; a dye medium take-up member for taking up a dye medium to which the dye is applied; a first power transmission member for transmitting power to the dye medium take-up member; a recording medium transporting member for transporting the recording medium; a drive member for driving the dye medium take-up member and the recording medium transporting member, which can be driven forwardly and reversely; a pivotal member which is pivotal in response to rotation of the recording medium transporting member; a second power transmission member for transmitting power from the recording medium transporting member to the first power transmission member, which is mounted on the pivotal member; an urging member for bringing the recording medium transporting member into contact with the pivotal member so as to transmit driving force of the recording medium transporting member to the pivotal member; and a preventive member for selectively pr

Abstract: A clutch and brake mechanism for a mechanical drive of print drum in a franking machine is disclosed which utilizes a clutch and brake operated by means of electric potentials applied across an electro-rheological fluid. Elements of the clutch and brake are formed with annular walls which are interposed to form opposed electrodes between which the electro-rheological fluid is contained. Application of electric potentials to the fluid is controlled by a microprocessor.

Abstract: Disclosed is a typewriter wherein a ribbon holder mounted on a carriage movable along a platen holds both a print ribbon and a correction ribbon thereon and is displaceable between its first lift position for facing the print ribbon to a print point on the platen and its second lift position for facing the correction ribbon to said print point.The disclosed typewriter is provided with lift means for displacing the ribbon holder between its first and second lift position, detecting means for detecting the lift position of the ribbon holder, and control means for controlling the lift means to displace the ribbon holder in response to the result of detection of the detecting means, thereby the possibility of errorneous initial printing is eliminated, which may occur when a power supply is once turned off during a correcting action with a correction ribbon and then is turned on again to perform a normal print operation.

Abstract: Disclosed is a typewriter wherein a ribbon holder mounted on a carriage movable along a platen holds both a print ribbon and a correction ribbon thereon and is displaceable between its first lift position for facing the print ribbon to a print point on the platen and its second lift position for facing the correction ribbon to said print point.The disclosed typewriter is provided with lift means for displacing the ribbon holder between its first and second lift position, detecting means for detecting the lift position of the ribbon holder, and control means for controlling the lift means to displace the ribbon holder in response to the result of detection of the detecting means, thereby the possibility of errorneous initial printing is eliminated, which may occur when a power supply is once turned off during a correcting action with a correction ribbon and then is turned on again to perform a normal print operation.

Abstract: A typewriter ribbon lifting mechanism includes a holder supporting a printing ribbon and a correction ribbon below the printing ribbon. The holder is vertically tiltable for lifting the printing or correction ribbon selectively from its inoperative position to its operative position. The holder is normally held in its lowered inoperative position. A cam follower is secured to the holder and supports an axially movable follower pin thereon. A ribbon lift cam is rotatable only in one direction to cause the cam follower to tilt the holder vertically. The cam has a first cam groove in which the follower pin is engageable to raise the holder to place the printing ribbon in its operative position, and a second cam groove in which the follower pin is engageable to raise the holder to place the correction ribbon in its operative position. The second cam groove has a portion which forms a part of the first cam groove, while the remaining portion of the second cam groove is greater in depth than the first cam groove.

Abstract: A daisy wheel typewriter wherein wheel positioning to present a character for printing and hammer actuation to effect printing of a selected character are electronically operated in response to keyboard generated signals. Functions associated with a printing action, e.g., ribbon lift, ribbon feed, and carriage spacing, are, however, operated mechanically in synchronism with the electronics by a timing disc driven by a print cycle function actuating shaft. Non-printing service functions are also operated mechanically by conventional powered mechanisms responsive to keyboard generated signals.

Abstract: A typewriter having a carriage return line indexing key to initiate in parallel a powered carriage return and a powered line indexing operation is provided with linkage associated with the carriage return action which assures initiation of the line indexing operation should the keylever depression be sufficient to initiate a carriage return operation but insufficient to initiate the line index operation.