Patent GB-928050-A (GB)
Title: Improvements relating to machines for making boxes and the like
Inventor: EASTER JOHN WILLIAM
IPC: B26D1/24
Filed: 1960-03-10
Abstract: 928,050. Cutting-machines. HENRY SIMON Ltd. March 3, 1961 [March 10, 1960], No. 8446/60. Class 31 (1). [Also in Group XVI] In a machine for cutting slots and forming creases in cardboard blanks for making boxes and the like having at least one pair of slotting knife elements 11, 12, Fig. 3, adjustable transversely to the direction of cut, at least one associated pair of creasing roll elements 13, 14 adjustable transversely to the direction of creasing and arranged in alignment with the knife elements, and a yoke member 27 engaging the knife element 11 and creasing roll element 13, the or each yoke member engages each of the shafts 3, 7 carrying the elements 13, 11 through the intermediary of antifriction bearings 23, 24, Fig. 4, the yoke member also having a slidable plunger 29 which, when extended, engages and holds in alignment the element 14, each yoke member having a screwed shaft 15 for moving it in a direction parallel to the transverse direction, and control elements are provided which in addition to causing the shaft 15 to become operative also automatically ensure that the knife and creasing roll elements cannot move transversely except when the shaft 15 is operative. The plunger 29 is coupled to a piston and cylinder 30 controlled by a valve 31. The shaft 15, which is driven by a reversible motor 56, Fig. 6, engages a screwed nut 32 mounted in the yoke member against axial movement, the nut having its peripheral surface provided with axial slots which are engageable by a slidable plunger 37 mounted in the yoke member to rotationally lock the nut 32. The plunger 37 is displaceable by a piston and cylinder 38 controlled by a valve 39. The yoke member has a cam lever 42 pivotally mounted so that its cam surface 43 can be engaged with a fixed cross bar 16 to lock the yoke member in position. The lever 42 is moved to and from engagement with the bar 16 through linkage operated by a piston and cylinder 44 controlled by the valve 31. The linkage has an extension 45 which operates the valve 39. Each knife element 12 and creasing roll element 14 is lockable on its shaft by means of a radially movable key 46, Fig. 5, resting on an inflatable hose-like element 47, the key being adapted when the element 47 is inflated, to engage a resilient seating 52 in the knife or roll element. A valve 59, Fig. 6, admits air to, or releases it from, the members 47. Each yoke member has an extension 53 supporting a stripper plate 54 for stripping slotted board from the knife element 11 and a locating fin 55 engaging a feed roller element 9. The motor 56, pistons and cylinders and valves are arranged in an electrical circuit, Fig. 6, which comprises a control switch 62 having an " off " position and two " on " positions, a motor starter 58 which causes the motor 56 to run in one or other direction when the switch is moved to one or other of its " on " positions, a solenoid 72 energized in each of the " on " positions of the switch to operate the valve 31 controlling the piston and cylinder 30 for operating the plunger 29 to engage the creasing roll element 14 and the cylinder 44 for moving the cam lever 42 out of engagement with the bar 16, the piston and cylinder 44 operating the valve 39 controlling the piston and cylinder 38 operating the plunger 37 for rotationally locking the nut 32, a solenoid 64 energized in each of the " on " positions of the switch for actuating the valve 59 for releasing air from the members 47 locking the elements 12, 14 to their shafts.