Abstract:
The invention provides an apparatus (26) for forming a box blank from a generally-rectangular sheet of material. The apparatus has a frame (28) for supporting and guiding the sheet; and endless advancement belt (31) for controllably moving the sheet relative to the frame through the apparatus; guide rails (32) extending generally across the sheet; a carriage (34) mounted on the guide rails for horizontal movement relative thereto; a cutting blade (35) mounted for horizontal movement with the carriage and operatively arranged to be rotated about an axis; a blade actuator (36) for selectively causing the blade to have a vertical component of movement relative to the carriage; a punch (38) mounted on the carriage and selectively operable to punch a hole in the sheet; a transverse creasing roller (39) mounted on the carriage; and a pair of adjustable longitudinal creasing rollers (40) mounted on the platform. As the sheet is moved relative to the frame, the transverse creasing roller may selectively crease the sheet in a transverse direction, the longitudinal creasing rollers may selectively crease the sheet in a longitudinal direction, and the cutting blade may selectively cut slots from both longitudinal edges.
Abstract:
A product order specification change system for a corrugation machine having a slitter-scorer device and a plurality of cutoff devices for producing corrugated board sheets having various widths and lengths, includes a cutting apparatus wherein at an order change where specifications for the sheet width are changed from one order to the next, a region is formed between the leading end of the new order sheets and the trailing end of the old order sheets, wherein a transitional slit groove is cut connecting a slit groove of the old order sheets with a slit groove of the new order sheets. As a result, the web can be stably transferred through stages of the machine, the cutting dimension accuracy can be maintained precisely, and faults such as jamming can be eliminated.
Abstract:
Web-shaped packaging material, which is to be cut into strips for integration into a package, is fed through a web-changing device which has knives and two conveying sections, the conveying sections converging upstream of the strip-cutting station. In order to be able to perform a web change-over, the web-changing device comprises a fixed knife arranged between the two conveying sections and movable knives which cooperate with the fixed knife for severing the respective webs of packaging material to produce leading and trailing edges which correspond to the shape of the front and rear edge of the strips. A deflecting device for the severed front end of a new web of packaging material is provided in each conveying section.
Abstract:
Box blank-forming apparatus (60) is provided which includes a feeder assembly (62) and a scoring/slotting assembly (64) each provided with adjustment structure (62a, 64a) to facilitate makeready adjustment of the apparatus (60) between production runs. The feeder assembly (62) preferably includes a reciprocal pusher element (170) operable to successively engage sheets (30) to be formed into box blanks (36). The element (170) is supported by a pair of elongated, threaded, axially rotatable, fore and aft translatable positioning screws (146, 148), so that upon rotation of the screws (146, 148), a reference position of the pusher element (170) may be varied. Adjustment of the assembly (64) is accomplished by means of compensators (292, 294) which are respectively coupled to associated slotter wheel and scoring wheel shafts (288, 286). Operation of the slotter wheel shaft compensator (294) serves to adjust the circumferential positions of the fixed slotter knives (358), whereas operation of the scoring shaft compensator (292) varies the position of the adjustable knives (360) through the medium of transfer gears (384). Servo-sensors (438-442, 446-448 and 270) are used to continuously monitor the lateral and circumferential positions of the scoring/slotting stations (296-304) and a reference position of the pusher element (172), so that precise makeready adjustments can be accomplished.
Abstract:
The present invention contemplates an outfeed lift ramp (24) for use with a male (19) and female (18) combination of blanking dies for separating a diecut paper box blank (21) from an attendant web portion (20). Outfeed lift ramp (24) is appended to the leading edge (33) of female die member (18) adjacent to blanking through holes (32) at preselected points corresponding to a series of naturally occurring or benign box blank slots (31). During the blanking operation, the diecut and partially stripped sheet (17) is interposed over the die through holes and the upper arcuate portion of the lift ramp (38) extends through the through slots (31) of the sheet to be blanked thereby permitting the sheet to lie flush against the female die surface. After blanking, box blanks 21 are forced through female die through holes (32) and all that remains on the female die surface is a flexible and flimsy web (20). Upon automatic removal of the web across the die face, entanglement and snagging on the die leading edge (33) often occurs. The lift ramps (24), however, while not impeding the blanking operation, serve to lift and support the flexible internal webs (25) generated by blanking across the die leading edge independent of the non-supportive nature of the web (20).
Abstract:
In the production of hinge lid packs with rounded longitudinal edges, collars (10) which are present in this type of pack are preshaped in the region of longitudinal edges (13) which are also rounded. For this purpose, a scoring (embossed strip 21, 22) which extends in the longitudinal direction is applied to a web of material (14). Thereafter, the collars (10) are severed from the web of material (14) and are preshaped in the region of the longitudinal edges (13) which are to be formed. The collars (10) which have been prepared in this way can be placed on a cigarette block and be further processed in the conventional manner.
Abstract:
A cut and score die apparatus is provided for progressively converting a sheet of material into blanks. The apparatus includes a punching section for punching scrap material from the sheet of material to define an array of interconnected blanks arranged in a grid of rows and columns on the sheet of material. A scoring section is provided for simultaneously scoring a first predetermined pattern on a trailing portion of a first row of blanks and a second predetermined pattern on the leading portion of a second, succeeding row of blanks on the sheet of material. A blanking section is also provided for piercing the sheet of material in a predetermined pattern to cut blanks from the sheet of material without producing any additional scrap material.
Abstract:
When blanks for producing (cigarette) packs are made in the region of the packaging machine itself, especially by being severed from a web of material (12), the blank production must be matched to the performance of the packaging machine. For severing blanks (10, 11) from a web of material (12) having stampings, perforations, etc. drawing rollers (25, 26) and conveying rollers (33, 34), on the one hand, and tearing rollers (27, 28 and 35, 36) running at a higher speed, on the other hand are used. The blanks (10, 11) are torn off as a result of the difference in the conveying speed. In the simultaneous processing of two blanks (10, 11), units (23) comprising two blanks (10, 11) are first servered from the web of material (12) and these are then divided into individual blanks (10, 11) which are conveyed further, especially fed to a folding turret (20).
Abstract:
In the production of packs, especially hinge-lid packs, from rigid packaging material (thin cardboard), hitherto individual blanks have been supplied in stacks and introduced into the packaging machine in succession. To make the handling of the blanks easier and to increase the storage capacity, the blanks (23) are now connected to one another via residual connections (25) into a continuous web of material (24) wound as a reel (30). Within the packaging machine, the blanks are severed from the web of material (23) in succession, specifically as a result of the elimination of the residual connections, preferably by being torn off. The residual connections (25) are formed in a region of the blanks (23) or in the region of folding tabs of the latter which, in the finished pack (hinge-lid pack), are concealed by other folding tabs, that is to say are on the inside.
Abstract:
A die-cutting machine comprises two form-carrying rolls (10,12) operable in timed relation to produce alternate blanks, with minimum wastage between the blanks, from a web fed at constant speed by a conventional feed mechanism (14). The rolls (10,12) are driven by computer-controlled variable speed high impulse duty D.C. motors (28,30) supplied with electrical power from thyristor controlled power supplies (36,38). Sensors (18, 24, 26) provide feedback signals representing web speed and instantaneous roll positions and speeds to the programmable computer units (32,34). The use of the computer-controlled D.C. motors avoids backlash problems in previously proposed mechanical drives and allows greater flexibility, especially in maintaining registration between the rolls and preprinted areas on the web. A flywheel arrangement is employed to reduce the loading on the motors during large variations in roll speed.