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US 4,227,803 AGranted
Continuous copying machine
AssigneeAgfa-Gevaert
InventorsHans A. Massengeil, Georg Bock, Fritz Steinlehner
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AssigneeAgfa-Gevaert
InventorsHans A. Massengeil, Georg Bock, Fritz Steinlehner
Estimating the term…
A pair of infeed rollers located upstream of an exposure window and a pair of outfeed rollers downstream thereof transport an original across the exposure window so that successive portions of the transported original be imaged onto successive portions of copying medium whose transport speed corresponds to that of the original. The lower infeed and outfeed rollers are stationary, but the upper ones are located at the coupling links of a four-or five-link transmission mechanism comprised of cranks and rockers. A tension spring tightened by an electromagnet causes the upper infeed roller to move down and press against the lower infeed roller. Due to the transmission mechanism, variations in the thickness of an original transported between the infeed rollers inherently modified in a controlled manner the force of the upper outfeed roller against the lower and/or the spacing of the upper outfeed roller from the lower, so that an original transported across the exposure window by the infeed rollers not collide with the outfeed rollers. Intermediate successive copying operations, the roller pairs open, so that an endless original, such as a computer print-out, can be reverse transported by a distance at least equal to the transport-direction length of the exposure window, to form upon successive sheets of copying medium successive images which adjoin to form a gapless image of the endless original.
In a continuous copying machine of the type in which an original is transported across an exposure window for imaging of successive portions of the transported original upon successive portions of a copy medium transported at a speed corresponding to the transport speed of the original, in combination, a pair of infeed rollers located upstream of the exposure window, including stationary mounting means mounting one infeed roller, the other infeed roller being movable;
In a continuous copying machine of the type in which an original is transported across an exposure window for imaging of successive portions of the transported original upon successive portions of a copy medium transported at a speed corresponding to the transport speed of the original, in combination, a pair of transport rollers operative when in engagement with each other for transporting an original located between them across the exposure window, at least one of the transport rollers being movable towards and away from the other transport roller;
A method of operating a continuous copying machine, the copying machine being of the type in which an original is transported across an exposure window for imaging of successive portions of the transported original onto successive portions of a copy medium transported at a speed corresponding to the transport speed of the original, the method comprising transporting a lengthy original in forwards direction across the exposure window to effect copying of a limited section of the original upon a sheet of copying medium, and then transporting the original in the opposite direction by a distance at least equal to the transport-direction length of the exposure window, and then transporting the original once again in forwards direction across the exposure window to effect copying of the next limited section of the original.
Dependencies are inferred from the claim text.