GB265413A - An improved apparatus for, and/or mode of treating or creasing strawboard, cardboard, and like material for use in the manufacture of boxes and the like - Google Patents

Abstract

265,413. Bishop, E. L. March 23, 1926. Creasing.-In the formation of creases in cardboard or the like to facilitate folding in the manufacture of boxes, the cardboard is bent round a rotating wheel and is deflected into the space between two converging wheels or bodies adapted to complete the formation of a compressed U-shaped crease. The machine shown in Figs. 1 and 2 forms two creases simultaneously and comprises two pairs of wheels, each pair being constructed and arranged in the following manner :- A vertical cylindrical wheel c, formed on a sleeve c<1> which is feathered on a driving- shaft b, co-operates with a conical inclined wheel d running on an inclined hub d<4>, the wheels being connected by a flexible coupling c<4>. The wheels are provided with serrated rims c<2>, d' having inner faces c<3>, d<6> which converge to a narrow gap at the top. The hub d<4> is mounted on the sleeve c<1> and has an arm d' connected by a rod d<3> to a, rocking arm d<2>, the hub j<2> of an arm j being arranged between the hub d<4> and arm d<2>. A spring c<5> forces the wheels apart and holds the arm d<2> in contact with a stop c'. The wheels are moved axially to bring the gap into register with the crease line by turning a threaded shaft i which engages a threaded boss j<1> on the arm j. The angular position of the wheel d with respect to the wheel c is adjusted by rocking the arms d<1>, d<2>, this being effected by turning a threaded. shaft n which engages a threaded boss n<2> on a link n<3> connected to the rod d<3>. Simultaneously with adjustment of the angular position, the gap between the wheels is adjusted by means of wedges o<1> which abut on the hub j<2> and are pivoted on the boss n<2>. To permit independent adjustment of the angular position and gap, the wedges may be operated by an independent shaft. The wheel c is engaged at the top by spring-pressed rollers e, and an adjustable blade or deflector h is arranged above or partly within the gap between the wheels, the rear edge h<x> being slightly in front of the narrowest part of the gap. An incline h<2> may be arranged between bottom h<1> and rear edge. The rollers and blade are supported on a slide e<1> mounted on guides a<1> and adjustable by means of a threaded shaft f<1> which is geared to the shaft i, the shafts being rotated simultaneously by a handle k<1>. The blade is secured to a holder g<3> vertically adjustable on a bracket g<2> which is adjustable horizontally on the slide e<1> by means of a screw g<1>. The cardboard is placed on a table p and is bent by the rollers e, the blade h deflecting the cardboard into the gap and thereby forming a crease which is gradually squeezed by the wheels. During the formation of the crease, the part of the cardboard that overlies the wheel d is bent slightly upwards on the line of the crease, thereby permitting formation of the crease without tearing. Shafts i, f are formed with right and left hand threads for the purpose of simultaneously operating the adjusting-device associated with the two pairs of wheels. The rollers e may be dispensed with, the blades h being arranged to bend the cardboard round the wheels and to deflect it into the gaps.