Flexible tubular package for edible product
A squeezable, flexible tubular package for an edible product is compartmented to simultaneously hold a first edible product in one compartment separate from a second edible product in another juxtaposed compartment. The package includes an elongated enclosure defined by a pair of transparent, flexible film strips bonded to one another around the periphery thereof by a liquid tight seal; and a membrane situated between the film strips, bonded to the periphery of the film strips by a liquid tight seal, partitioning the enclosure into a pair of juxtaposed, liquid tight compartments. An extrudable, edible product is separately contained in each of the compartments. Apparatus for continuously and successively forming, filling and sealing articulated arrays of such packaged products is also disclosed.
1. A packaging apparatus for an articulated array of a-flexible, tubular, compartmented packages which comprises:
a substantially vertical frame;
a pair of driven, parallel, grooved heat sealing rolls rotatably mounted to the frame, each heat sealing roll defining at least one opposed circumferential groove and the rolls together defining open passageways between respective opposed grooves;
a membrane sheet supply mounted to the frame above the heat sealing rolls and positioned to feed continuously a membrane sheet between the heat sealing rolls;
an outer film sheet supply mounted to the frame on each side of the membrane sheet supply and positioned to feed continuously a substantially co-extensive outer film sheet between the heat sealing rolls on each side of the membrane sheet and in a face-to-face relationship with the membrane sheet;
downwardly extending stationary liquid product dispensing nozzles on each side of the membrane sheet between the membrane sheet and adjacent outer film sheet; and
a transverse heat sealing device having a laterally reciprocatable heat sealing head assembly and a stationary heat seal anvil mounted to the frame a predetermined distance below the heat sealing rolls and adapted to fuse together a portions of the membrane sheet and the outer film sheets contiguous therewith while simultaneously forming and sealing an articulated transverse bottom sealed margin of one articulated array and an articulated top sealed transverse margin of another contiguous articulated array downstream from said one articulated array, the articulated top sealed margin comprising a fully sealed top region and a unitary, partially sealed ribbed region which includes a plurality of open pockets in communication with an interior cavity of a compartment in the compartmented packages and defined by a plurality of sealed ribs which extend at an acute angle along the width of the top sealed margin; and
a transverse knife assembly below the transverse heat sealing device which knife assembly includes a laterally reciprocable knife and an opposed stationary anvil;
said parallel, grooved sealing rolls being spaced from one another at a distance sufficient to pinch therebetween and heat-seal to one another the membrane sheet and the outer film sheet at pinch sites to form compartmented packages having two adjacent longitudinal compartments; and
said stationary liquid dispensing nozzles being positioned to dispense a liquid product into the adjacent longitudinal compartments formed by the sealing rolls.
2. The packaging apparatus in accordance with claim 1 wherein each heat-sealing roll defines a plurality of opposed circumferential grooves.
3. The packaging apparatus in accordance with claim 1 further including perforation wheel assemblies between the heat sealing rolls and the transverse heat sealing device and spaced for contact with longitudinal seams defining the tubular compartmented package.