Patent GB-1029758-A (GB)
Title: Document handling apparatus
IPC: G06K13/08
Filed: 1963-07-15
Abstract: 1,029,758. Feeding and delivering sheets. RADIO CORPORATION OF AMERICA. July 15, 1963 [Aug. 21, 1962], No. 28014/63. Headings B6B and B6H. A document or punched card handling apparatus comprises an input hopper 20, Fig. 1, having a throat 28, Fig. 4, through which the documents 22 are fed out on to a rotatable vacuum feed drum 26, the documents being stripped from the feed drum by a stripper guide 214 guiding the documents to a vacuum stacker drum 34, which advances the documents to an output hopper 24, Fig. 10, where a selectively operated control gate 46 strips the documents off the stacker drum and guides them to one or another of two positions in the output hopper, depending on the position of the gate. Feeding sheets.-The documents 22, Fig. 4, are stacked on edge in the input hopper defined by fixed walls 98 and 30 and two adjustable walls for dealing with variable sizes of documents and comprising a loader plate 70 constrained to move parallel to the front wall 30 by a linear bearing 72 sliding on a guide rod 66 and a hollow guide bar 82, which is supplied at the rear end by pressurized air introduced by a hose 87 the air leaving through air passages 91 drilled in the fan-shaped end of the bar 82. The pressurized air is directed to the trailing edges of the first few documents to riffle them and prevent frictional drag between. Pressurized air is also introduced at the throat 28 by a nozzle 85 for the same purpose. To further reduce the frictional drag between the documents 22 and the base-plate 56, Fig. 1, of the hopper an electromagnet 62 is provided to vibrate the base-plate. The documents are also aligned vertically at the throat 28 by a slidably mounted vertical guide, having arms 89a, 89b the bottom faces of which have inclined surface (Fig. 3, not shown) which guide the documents down to the base-plate 56. The documents are fed singly out of the hopper 20 by a selectively operated input gate 32 (Fig. 2, not shown) which is pivotally mounted on the front wall 80 adjacent the throat and comprises a bifurcated member 164, having fingers 166a ... 166c (Fig. 8, not shown) which co-operate with peripheral grooves 124, Fig. 7, on the feed drum 26. The bifurcated member 164 is attached to a linkage 174 operated by a solenoid 178, which when actuated swings the member 164 counter clockwise to cause the said fingers to lie within the grooves of the drum, whereupon the leading edge of the first document is in contact with the drum 26, and the document is removed out of the hopper 20 when an apertured shoe 128, moves into the range of a vacuum chamber 148 on the drum. Double feed is prevented by a pair of counter-clockwise rotating separator wheels 36 acting on the leading edges of the documents. The wheels are adjustable with respect to the throat opening to accommodate documents of varying thickness. The document attached to drum by suction is advanced between a first pair of high friction, flat belts 40 carried on idler rollers 38a ... 38c, driven by the drum 26 and transported toward a stacker drum 34, the document being stripped from the drum 26 by a guide stripper 214 which guides the document into the cup formed by the stripper and drum 34. The document may be read by a character reader 50, indicated schematically in Fig. 1, for reading a line of printed characters or a punched card reader 52 located between the separator wheels 36 and the idler rollers 38c, where there is no belt to block the holes punched on the card. Sheets delivery.-The document entering the nip formed between the vacuum stacker drum 34, Fig. 10, and the guide stripper 214 is advanced by the stacker drum between a second pair of high friction belts 44 carried on idler rollers 42a . . . 42c, to an output hopper 24, whereby the trailing edges of the documents are swept against a loading plate 218 by a belt 222 driven by a motor 221, Fig. 1, and the position of the document in the hopper 24 is determined by the selectively operable output gate 46, which comprises a bifurcated member 228, Fig. 12, having fingers 230a . . . 230c, which move into and out of the grooves of the stacker drum 34. If the readers 50 or 52, Figs. 1 and 4, do not establish any erroneous matter, illegible information or any particular classified information or the document a solenoid 240, mounted on a fixed side wall 48 of the output hopper remains de-energized and the fingers of the output gate 46 lie within the grooves of the drum 34 whereby the leading edges of the document abuts the side of the wall 48 and the document is stripped of the stacker drum. When an error or other fault or information is detected by the readers a signal is sent to the solenoid which when energized pivots the output gate 46 counter clockwise to move the fingers out of the grooves of the drum, whereby the step-shaped ends of the fingers engage the leading edge of the corresponding document, which is thereby prevented from moving to the right-hand wall 48, the rejected document being offset in this position from the stack for removal.