Abstract:
In a cup sealing system including a cup former and at least one burner for sealing a cup bottom seam where a cup side wall blank is mated with a bottom disk, with one portion of the side wall extending beyond the bottom disk, an improvement wherein at least one burner includes a burner head with a plurality of circumferentially arranged flame nozzles and a pilot flame aperture, the pilot flame aperture adapted to be located axially adjacent the one portion of the cup side wall; a flame ignitor/sensor positioned adjacent the flame aperture; and a combustion chamber which extends from a forward edge of the burner at the flame nozzles to a location axially beyond the container side wall to thereby achieve uniform heating of the extended portion of the cup side wall. The burner head also includes a pair of relatively movable sleeves adapted to create an annular pilot flame ring gap on start-up.
Abstract:
An automatic pail box machine is disclosed which makes folded boxes from pre-made blanks of paper and attached handles from a flexible strip of blank handles retained in a removable spool. The machine includes a conveyor and clinching mechanisms for utilizing both a flexible strip a strip of straight blank handles and with blank handles the ends of which are pre-bent. Feeding blank handles into position for fastening may be provided by a feeder having electrical solenoids which are energized in timed relationship. A simple anti-retraction device is provided to insure that the flexible strip does not retract.
Abstract:
An apparatus for folding and joining boxes formed from flat or basically flat box material includes a device for advancing box materials from stock or storage to a device for pre-treating the box materials by heating prior to welding or by application of glue, a device for folding the box materials and holding the box materials in a folded position until a joining operation is ended, and a device for transporting the thus formed boxes to storage or the like.
Abstract:
A four-sided, sift-proof carton and method of sealing the end flaps of same includes two minor flaps and an inner and outer major flap at the top and bottom of the carton. The inner and outer major flaps are each formed with a width less than the depth of the carton so that when folded a space or gap is formed beneath the outer major flap between the leading edge of the inner major flap and the fold line of the outer major flap. A sift-proof seal is formed between the flaps by applying ribbons or strips of foamed hot melt adhesive along the outer ends of the inner major flap which is folded atop the minor flaps, and by applying strips of foamed hot melt adhesive in a block C shape onto the ends and middle of the outer major flap which is folded atop the minor flaps and inner major flap. The strips of foamed hot melt adhesive at the ends of the outer major flap fill the gap along the minor flaps between the leading edge of the inner major flap and fold line of the outer major flap to create a sift-proof seal without the inner major flap extending completely across the top or bottom of the carton.
Abstract:
An apparatus for inserting an internal lid (6, 7) in a tubular formed container (1) and for sealed connections of the lid to the inner of the container tube by constant heat welding, high frequency welding or ultrasonic welding and comprising a carrier (8) for holding the container tube (1) while introducing and weld connection the lid (6, 7), a support provided above the carrier (8) for positioning a plane punched out lid blank having a larger outer periphery than the inner periphery of the container tube, a piston means (16) pressing the lid blank into the container tube while folding a narrow edge rim (7) upwards from the lid plane (6) and in which the piston means comprises a lower piston part (18) and an upper piston part (20) which are axially movable in relation to each other and an expandable means (19) between said two piston parts (18, 20) which expandable means is pressed radially outwards when the two piston parts (18, 20) are compressed. The bottom of the lower piston part (18) is formed with a thin press edge (21) having an outwards-downwards sloping surface (24) which at the inner part thereof is directly succeeded by a flute (22). The upper piston part (20) which at the bottom is cup-shaped (25) is axially movable on the lower piston part (18) into and from contact with the expandable means (19). The expandable means preferably is a rubber ring (23) the form of which is changed when the upper piston part and the lower piston part are compressed, whereby the rubber ring is formed with a radially outwards directed pressure line (26) engaging the fold up lid rim (7) adjacent the very lid plane (6). The carrier (8) and the press piston (16) has substantially parallel cylindrical sides, whereby the weld pressure practically solely is provided by the expandable means (19) within area of the means (10) of the carrier for providing welding heat.
Abstract:
A method of forming a container including the steps of: providing a sheet material defining a peripheral wall structure bounding a receptacle with an open end, and a closure portion having gable panels and a plurality of fins for closing the open end of the receptacle; reconfiguring the closure portion to place the closure portion in a closed state wherein the plurality of fins are in overlying relationship and the gable panels reside between the fins and the peripheral wall structure; effecting a seal between a plurality of the fins using a first sealing pattern; and after effecting the seal using the first sealing pattern effecting a seal between a plurality of the fins using a second sealing pattern.
Abstract:
A non-releasable mechanical join useful for permanent joins of plastics material cartons is formed by a row of a plurality of engagement tabs interlocked in a complementary row of slots. The engagement tabs have heads able to passthrough the slots in one direction but unable to return in the other direction. The tab heads may be formed as arrowheads, the barbs of which act against edges of the slots to disallow withdrawal. Suitably, the leading edges of the slots ar convexly arcuate towards the approaching arrowheads. This may help to provide secure engagement. The greater the number oftabs and slots, the greater may be be the permanence of the join.
Abstract:
There are provided here a hand-operated and automatic machines for producing pail boxes from pre-made blanks of paper and wire handles bonded together in the form of a bar, and a machine for producing wire handles. The hand operated pail box machine includes a folding assembly, clinching mechanisms for attaching a wire handle to the folded box, a wire handle conveyor and levers for driving machine by the user himself. The hand-operated machine has such small dimensions that several of these machines can be installed one on the other in a unit for producing pail boxes of different sizes. The automatic pail box machine in addition to said hand-operated machine, is equipped with a blank storage assembly, a feeder for feeding box blanks, a receiver for made boxes, and a mechanical drive. The machine for making handles from a continuous strip of plurality of parallel metal wires bonded together includes as frame, three pairs of columns with punches, two bed dies, a strip feeding mechanism, and a strip cutting mechanism. The machine is to be driven continuously. The cut off wire strip is then bent and moved off the machine.
Abstract:
A composite can construction wherein the body wall, adjacent either one or both cap receiving ends thereof, is inwardly compressed to reduce the outside diameter of the tubular body while maintaining the inside diameter. The compression, reducing the thickness of the body wall, also densifies the material thereof without effecting the interior of the container or the structural integrity thereof. The compressed area extends along the length of the container body a distance sufficient to project substantially beyond the bead formed as a metal end cap is seamed to the body, thus providing a recess for facilitating accommodating of the driving wheel of a conventional can opener. The formed bead, utilizing the pre-compressed body portion and the denser material thereof, is relatively narrower and stiffer than the bead conventionally obtained upon the sealing of a metal end cap to a composite tubular body.
Abstract:
The invention relates to a device for manufacturing a flap box, in which peripheral strips at the open ends of a rectangle-section box formed previously from a plano are provided with glue and subsequently bent over, after which the sidewalls of the box are cut in the longitudinal sense; the device according to the invention comprises holders having each a box, at least one gluing member adapted to move towards and away from each of said holders for applying glue to the faces of one pair of opposite peripheral strips orientated to the same side and stops adapted to move relatively to said holders for folding over in sequence one glued peripheral strip located nearest said side, the other pair of opposite peripheral strips and the other glued peripheral strip.