Abstract:
A cutting device for a cutting machine for use in the corrugated box industry is disclosed. Cooperating rollers or heads are positioned on opposed rotatable shafts. The heads are disposed for cutting or scoring material passed through the heads. A hub assembly is connected to each of the heads for releasably securing the heads to the shaft. The hub assembly is resiliently biased in a manner to secure the rollers on the shaft. A rotatable cam is positioned adjacent the hub assembly. The rotatable cam is rotatable to engage and move the hub assembly in a manner whereby the hub assembly disengages from the shaft and allows the heads to be moved along the shaft to a new position.
Abstract:
A process for producing a tubular casing by folding a flat plastic sheet (1) into a tubular structure by a shaping former (6) as the sheet advances, and joining the meeting edges of the folded sheet to form the tubular casing, characterized by forming grooves (13) on one or both sides of the sheet along fold lines, coating a surfactant (12) on the sheet surface at least at the fold line portions of the sheet surface which are to be brought into contact with the shaping former, and then folding the sheet into a tubular structure by the shaping former.
Abstract:
A creasing rule is provided for a cutting die for processing corrugated board. The creasing rule has an elongate, smooth, unbroken web having an outer side and an under side with the outer side having rounded, longitudinally-extending shoulders and a central, longitudinally-extending ridge extending outwardly therefrom at a central portion thereof. A pair of flanges extend outwardly from edges of the web and extend in opposite directions when mounted on a die plate of the cutting die. The under side of the web of the creasing rule has a shallow, longitudinally-extending groove therein which is preferably centrally or symmetrically located with respect to the ridge on the opposite side. The flanges of the creasing rule are affixed to the die plate, usually by staples driven through the flanges.
Abstract:
A method and apparatus for forming a compression scored release liner for use with a face stock carrying a pressure sensitive adhesive. The apparatus comprising a generally cylindrical roller having a generally semi-circular cross sectioned rib extending entirely around the surface of the roller concentric therewith, a pair of adjacent recesses forming relief areas extending entirely around the roller on either side of the rib, and a pair of lands each extending outwardly from the relief areas and forming the remaining cylindrical surface of the roller. The roller to compression scores the surface of a release liner in a controlled manner even though the thickness of the liner may vary, by providing relief areas and lands adjacent thereto on each side of the compression scoring rib so that excess material can be displaced from the scoring region in order to maintain uniform density of the liner in the scored region and prevent the rib from completely cutting through the liner.
Abstract:
An improved scoring apparatus of the type used in box making operations for the purpose of creating strategically located scores and cuts in box blanks that define the folding lines and tabs of the finished boxes. The scoring apparatus includes a selectively retractable scoring blade that can be pivoted between an extended position and a retracted position during operation of the scoring apparatus for permitting scoring and cutting along any position of the box blanks.
Abstract:
A method of working paperboard blanks is disclosed. The method includes providing first and second pairs of parallel rotary shafts supporting first and second pairs of tool heads respectively. The first pair of tool heads is moved to a predetermined longitudinal position along the first pair of shafts to define a first line of working. Likewise, the second pair of tool heads is moved to a predetermined longitudinal position along the second pair of shafts to define a second line of working wherein a center of the first line of working is displaced relative to a center of the second line of working. The paperboard blank is conveyed between the first and second pairs of tool heads to form a panel line on the paperboard blank. The tool heads may be automatically positioned along their respective shafts by coupling members which move linearly parallel to the shafts.
Abstract:
Improved slotter wheel apparatus (20) for use in the formation of box blanks is provided which includes a rotatable wheel (22) supporting a shiftable blade holder (24) and a slotting blade (26), with cooperating cam track (174) and follower (86) structure for selective shifting of blade (26) between an extended slotting position and a retracted blank-clearing position. An activation/deactivation assembly (30) allows the operator to separate cam track (174) from follower (88), thereby permitting use of apparatus (20) as a conventional, high speed, fixed blade slotter. A shock absorbing assembly (27) including a bridge piece (138) operably coupled with blade holder (24) and resilient pads (152, 154) serve to absorb potentially destructive mechanical loads experienced during outward shifting of the blade holder (24) and blade (26).
Abstract:
Multiple-station article processing apparatus (10) is provided which includes an adjustable processing station (14), a drive train (20), and a selectively operable drive train brake assembly (22) operable during adjustment of station (14). The preferred apparatus (10) is designed for fabrication of box blanks, and to this end includes an infeed assembly (12) for sequentially feeding paperboard sheets into the downstream scoring/slotting station where the sheets are scored and slotted to yield finished box blanks. During makeready adjustments when the position of the knives (66, 68) of the station (14) are changed, the braking assembly (22) is actuated to prevent unintended rotation of the drive train (20), which can result in changing the properly timed relationship of the stations within apparatus (10). The braking assembly (22) preferably includes a drum (80) secured to line shaft (74) of drive train (20), with a pair of pivotally mounted brake arms (88, 90) adjacent the drum (80); a piston and cylinder assembly (98) interconnects the outer ends of the arms (88, 90), and is actuated to move the arms (88, 90) into braking engagement with drum (80) during makeready adjustments.
Abstract:
An improved slotter wheel mechanism (30) designed for use in the formation of box blanks is provided which includes a rotatable wheel assembly (32) supporting one or more slotter blades (34); the blades (34) are coupled to the wheel by means (36) permitting shifting of the blades (34) during rotation of the wheel assembly (32) between an extended slotting position and a retracted blank-clearing position. In one embodiment, a slotter wheel (222) is equipped with a plurality of spiders (232) operatively secured to corresponding blade holders (246). As the wheel (222) rotates, the spiders (232) encounter strategically located members (294, 294a, 296 and 296a) serving to successively rotate the spiders (232), thus moving the blade holders (246) and blades (256).
Abstract:
A creasing rule is used in connection with a steel rule cutting die to form creases or fold lines in a blank cut from a sheet material, such as corrugated paper board. The creasing rule includes a base portion which fits into the slot of a die board, and a top portion which extends outwardly from the surface of the die board. The top portion terminates in a creasing edge, which, in cooperation with an anvil roll, compresses the sheet material to form a crease or fold line in the sheet material. The creasing edge of the creasing rule is formed with a plurality of undulations giving the creasing edge a generally sinusoidal form. The undulations on the creasing rule taper inwardly towards the plane of the base portion as the undulations extend from the creasing edge towards the base portion and finally merge into the flat base portion. The size or magnitude of the undulations can be varied depending on the thickness of the sheet material being used. Additionally, the pitch of the undulations (i.e. the number of undulations per linear inch) can be varied as desired to produce fold lines requiring different amounts of force and fold relief to bend.