Abstract:
A mechanical apparatus for modifying an individual sheet feed offset duplicator (10) to print impressions on continuous form pre-punched and perforated paper. A first tractor module (30) is attached to the input of the duplicator (10) for delivering the paper (50) into the duplicator (10) and an indexing mechanism (210, 220, 230, 240, 260) is provided in the first tractor module (30) for providing precise indexing to the paper as it is delivered into the duplicator (10). A device (280) 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 (40) is also connected at the output of the duplicator (10) 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 (10). 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.
Abstract:
A system is provided for processing at increased speeds a tractor-fed computer paper web (W), with nearly tensionless transport through web feeding units (B) and driving units (C) that are not speed-interdependent. For each processing cycle, the web (W) is extended without slack through an upstream lead (4) to a processing station where a certain length of the web (W) is positioned to be next processed, an excess length of loose web (6) is fed into that lead (4), forming a loop; then the certain web (W) length is processed and driven forward a distance shorter than the length of loose web (6); and then the web (W) is retracted from the upstream lead (4) to remove the residual loose web (6) and leave a next certain web length in position to be processed and delivered by way of refolding unit (D) into a pack (7) as a downstream lead of it is made slack by a web driven from the offset processing station (A).
Abstract:
An attachment and method for converting a duplicator (D) to a multi-purpose machine capable of printing serial numbers (ND), designs, logos and signatures, as well as scoring (64) and perforating work (54) sheets including a chase (C) adapted to be attached to a blanket cylinder (BC) of a duplicator machine for receiving implements for serial numbering, printing signatures, designs and logos, perforating and scoring.
Abstract:
A mechanical apparatus for modifying an individual sheet feed offset duplicator (10) to print impressions on continuous form pre-punched and perforated paper. A first tractor module (30) is attached to the input of the duplicator (10) for delivering the paper (50) into the duplicator (10) and an indexing mechanism (210, 220, 230, 240, 260) is provided in the first tractor module (30) for providing precise indexing to the paper as it is delivered into the duplicator (10). A device (280) 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 (40) is also connected at the output of the duplicator (10) 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 (10).
Abstract:
A small rotary offset press has a printing unit (2 or 3) in which are arranged an impression cylinder (7) fitted with a rubber blanket (6) and a forme cylinder (9) with a clamping device (10) for a sheet to be printed (11). A sheet feeder (12) is arranged on one side of the forme cylinder (9) and a sheet ejector (16) is arranged on the other side of the forme cylinder (9). The sheets to be printed (11) are held in readiness in a paper stack container (13) which forms part of the sheet feeder (12). The sheets to be printed (11) are transported to the clamping device (10) where they are fixed. On completion of printing, the printed sheets (11) are gripped by the sheet ejector (16) and placed on a delivery (17).