GB191003868A - - Google Patents

Abstract

3868. McNutt, W. A., Bowser, C. H., Dallas, D., Croad, A. K., and Burnside, A. M. Feb. 17. Bending and creasing; tripping-arrangements.- A machine for bending or creasing cardboard, paper-board, &c. is constructed with a vertically reciprocating die 1, Fig. 2, which is adjustable for acting on material of different thicknesses, and two lower dies 7 which are adjustable to form creases of different widths ; creases are produced at the desired distance apart in the boards by arranging feelers at various distances along the path of bands which deliver the creased material, the feelers controlling electric circuits to cause the die 1 to be untripped, this die normally being reciprocated without acting on the material. The material is fed forwards by rollers 34<a> and delivered by bands 35. The material is stopped in the required positions for the creases by stops 34, Fig. 9, carried on graduated bars 36, and when stopped, contacts 39, 40 complete a circuit to a solenoid 27, Fig. 5, or an electro-magnet 47, Fig. 7. In the former case, the solenoid 27 operates a bellcrank 28 carried by a fixed part of the machine, and this, as the beam 2 carrying the die 1 descends, moves a spring-controlled serrated bar 20 in a cover-plate 21 to the right by means of a lever 30 and spring 31 connected to a pin 32 on the bar 20. The upper part of the die 7 is serrated, and is normally pulled by springs into contact with bar 20, and is maintained inoperative ; but, when the bar 20 is moved to the right, the die 1 is depressed so as to coact with the members 7. The bar 20 may by actuated by a spring-controlled rod 52, Fig. 7, normally held by a latch-lever 49, which is adapted to be released by the electromagnet 47 actuated as described above. The bar 52 is returned to normal position to be again held by the latch 49 by a bell-crank 56, pivoted to the frame and to the beam 2. The stops 34 are raised just as the material is creased by means of bars connected by links to the bars 36, 42 actuated by projections 41 on the die 1, the bars acting through levers 45 and pins 46 which engage the stops. The dies 7 are carried by pivoted arms 8, which are actuated by toggle-levers 10 and a cam 5, the levers 10 being pivoted to eccentric pins on shafts 13, these pins being adjustable in position by means of a hand-lever 14 and a link 15 connecting arms 16 on the shafts 13. According to the Provisional Specification, the stops 34 are lifted by solenoids which are energized when the creasing-members come into operative position.