Patent GB-830980-A (GB)
Title: Improvements in and relating to apparatus for feeding and severing continuous webs of stationery
Inventor: BACKHOFF HAROLD ALBERT WILLIAM
IPC: B41L47/18
Filed: 1957-06-12
Abstract: 830,980. Feeding webs; addressing machines; cutting apparatus. EGRY Ltd., and BACKHOFF, H. A. W. June 10, 1958 [June 12, 1957], No. 18581/57. Classes 100(1) and 100(2) An apparatus for feeding and severing a web of continuous stationery having a series of connected form lengths, comprises electrically actuated means for feeding the web, electrically actuated control means for arresting the feed movement when a selected area of the web is in printing position and the leading end of a form length is correctly positioned with respect to web severing mechanism, and manually adjustable means for controlling the operation of the mechanism to effect a severing operation when a predetermined number of printing operations have been carried out on the form length. As shown, the apparatus comprises a unit A, Fig. 2, positioned at the delivery side of an addressing machine B, such that a continuous web W of stationery, printed by the addressing machine, will be fed to the unit. The web W is fed by a feed roller 4, Fig. 6, driven by an electric motor M through an electrically operated clutch, not shown. Pressure rollers 4a, on pivoted arms 8, co-operate with the roller 4. A blade 11 having a lower cutting edge 13 of inverted V-shape engages the opposite side edges of the web to effect cutting inwardly and transversely of the web. The blade is supported on a holder 14, Figs. 5 and 6, having upwardly extending portions 14a secured to opposite ends of the blade. The holder 14 is guided for reciprocating movement between plates 16 and is supported by posts 17 urged upwardly by springs 18. The holder 14 is actuated downwardly to effect cutting by a solenoid GR<SP>3</SP> (Fig. 7, not shown). This solenoid may be energized after each printing operation, after every other, third, of after any other desired number of printing operations, depending on the setting of a manually set selected switch SW (Fig. 7, not shown) in circuit with a switch S having a series of contacts, e.g., 48 and a rotor S<SP>3</SP> rotated from one contact to the next by a solenoid USW (Fig. 7, not shown) upon each operation of the printing head 26, Fig. 2, of the addressing machine. In operation, as the head 26 rises after printing on the web W it operates a switch, not shown, which energizes a relay OR (Fig. 7, not shown) having four pairs of contacts. One pair of contacts on opening causes a brake on the feed roller to be released and the clutch driving the feed roller to be engaged. The feed roller 4 is now driven until metal brushes 2a, Fig. 2, engage a metal plate 2d through a perforation in the web W to complete a circuit to a relay BR (Fig. 7, not shown), thereby disengaging the clutch and applying the brake to stop the feed roller 4. The web W is then in correct position for printing. The arm S<SP>3</SP> is moved forward one contact. If the selector switch SW is set for performing a cutting action after each printing operation, a solenoid GR<SP>3</SP> (Fig. 7, not shown) is energized upon closure of a switch upon lowering of the printing head; thereby causing the blade 11 to cut the web. If the selector switch is not set for energizing the solenoid operating the blade 11 printing alone is effected on successive portions until this solenoid is energized. According to the Provisional Specification, the web may be sensed by a photo-electric cell instead of by brushes 2a.