摘要:
An attachment and method for converting a duplicator to a multi-purpose machine capable of printing serial numbers, designs, logos and signatures, as well as scoring and perforating work sheets including a chase adapted to be attached to a blanket cylinder of a duplicator machine for receiving implements for serial numbering, printing signatures, designs and logos, perforating and scoring.
摘要:
An offset printing press having an operating lever mechanism which is capable of controlling sequential printing operations by manipulating a single operating lever. The offset printing press includes an inking roller system and a dampening roller system. The inking roller system is supported to a first pair of frames, while the dampening roller system is supported to a second pair of frames pivotable relative to the first pair of frames. The operation lever provides pivotal motion of the second pair of frames for selectively applying water to a plate cylinder from the dampening roller system. Further, rollers in the dampening roller system are movable toward and away from each other.
摘要:
An automatic plate supplying device for supplying plates to an offset printing machine is disclosed, which operates to sequentially supply original plates to an original plate conveying device adapted to feed original plates to a plate cylinder provided in the printing machine. A pivotable suction means removes plates from the bottom of a stack for delivery to the machine.
摘要:
The present apparatus greatly facilitates the handling of the printing foil or sheet material of which a printing master is produced for use in printing machines such as office offset machines. The foil handling means include a first pair of rollers arranged inside a hollow foil cylinder for paying out a length of foil. First clamping means are provided for securing the leading edge of the foil to said cylinder. Second clamping means are provided for clamping down a portion of the foil which after severing becomes the trailing edge of the preceding master and the leading edge of the next following master. For this purpose the second clamping means are combined with severing means.
摘要:
A mechanical apparatus for modifying an individual sheet feed offset duplicator to print impressions on continuous form pre-punched and perforated paper. A first tractor module is attached to the input of the duplicator for delivering the paper into the duplicator and an indexing mechanism is provided in the first tractor module for providing precise indexing to the paper as it is delivered into the duplicator. A device for adjusting the registration of the impression on the paper is provided in the first tractor module adjustment while the machine is operating. A rear tractor module is also connected at the output of the duplicator and engages the continuous form paper to maintain a predetermined amount of tautness on the paper by providing supplementary pulling on the paper while the paper is pulled through the duplicator. The present invention can also be used to collate multiple streams of continuous form paper into a single output stream as part of the printing process. Adhesive is then applied to the lateral edges of the output stream to create multi-part forms.
摘要:
A swing apparatus for an offset press auxiliary print unit which includes a swing arm detachably mounted on the auxiliary print unit and a vertical support member upon which the arm will pivot through a generally horizontal plane. The swing arm is rotatable and is operably connected to a pair of lifting tines through a parallelogram linkage so as to lift the auxiliary print unit to disengage it from the main press and then swing it horizontally clear of the press. A crank operates a worm gear and sprocket arrangement to rotate the arm and raise or lower the tines. In a second embodiment, a pair of brackets are affixed to a swing arm, and the entire arm is raised and lowered to lift the auxiliary print unit. An electric motor is used to raise and lower the arm.
摘要:
A combined electrostatic-lithographic duplicating process and apparatus is disclosed in which an electrostatic master copy of an original document is made in a zerographic copying unit and the master copy is subsequently converted to a lithographic master from which ink copies are made in a lithograph press. The process is carried out as a continuous operation from the making of the electrostatic master copy through the making of the lithographic ink copies in a series of interrelated steps. Also disclosed is a preferred embodiment of an apparatus for carrying out the above process in which the various instrumentalities for performing the specific steps of the process are so interrelated and arranged that the entire process is carried out by the apparatus disclosed in a continuous operation. The various instrumentalities are modular in construction to facilitate shipping, service and replacement of components.
摘要:
A swing apparatus for an offset press auxiliary print unit which includes a swing arm detachable mounted on the auxiliary print unit and a vertical support member upon which the arm will pivot through a generally horizontal plane. The swing arm is rotatable and is operably connected to a pair of lifting tines through a parallelogram linkage so as to lift the auxiliary print unit to disengage it from the main press and then swing it horizontally clear of the press. A crank operates a worm gear and sprocket arrangement to rotate the arm and raise or lower the tines. In a second embodiment, a pair of brackets are affixed to a swing arm, and the entire arm is raised and lowered to lift the auxiliary print unit. An electric motor is used to raise and lower the arm. The method of using this apparatus involves detachably securing the swing arm to the auxiliary print unit, swinging the print unit into operative connection with the main press, disengaging the swing arm from the print unit and swinging it horizontally clear of the press.
摘要:
An offset printer having a printing section and a plate making section in a unitary assembly. The plate making section is located above the printing section. The printing section includes a plate drum, a rubber drum, and a press drum. The press drum is disposed above and at a predetermined angle relative to the rubber drum. The diameter of the press drum is at least two times as great as the diameter of the rubber drum.
摘要:
This relates to an attachment kit for an offset printing press of the type manufactured and sold by A. B. Dick Company, which attachment comprises a leveling system including a pair of pivoting boards constructed to be mounted in parallel relation on a base board set on the feed table of the press to support two piles of envelopes in side-by-side relation. The vertical leg of a T-shaped guide bar having its cross bar and spacer fastened to the main bar of the press, passes between the two piles of envelopes and projects into a slot in the base board. A pair of backing plates having vertically-projecting members which bear against the rear of the envelope piles, are constructed to be fastened on opposite sides of the main bar of the printing press. This arrangement enables two piles of envelopes to pass through and be printed simultaneously by the press.