Device For Heat-Welding Superposed Flaps Of A Wrapping Enveloping A Set Of Articles
AssigneeInfinity Machine & Engineering Corp.
InventorDavide Dall'omo
Life of this patent
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Abstract
The device (1) is associated, in line, to an outlet of a packing machine and is designed to seal superposed flaps (Ls, Li) of packs (C), at longitudinal vertical sides (V) thereof. The device includes apparatus (2) for receiving and moving the packs (C) and includes two batteries (3, 4) of heat-welding rollers (30, 40), having a vertical axis, for acting on respective longitudinal vertical sides (V) in order to heat the flaps (Ls, Li) up to a temperature which is sufficient to cause joining by aggregation of the packing material. Cooling is provided downstream of the batteries (3, 4) for acting on the flaps (Ls, Li) in order to lower the temperature thereof and thus stabilize the joint.
Claims15
A device for heat-welding superposed flaps of a wrapping enveloping a pack of articles, for associating downstream of a packing machine in which the pack (C) of articles is formed, the flaps being arranged at longitudinal vertical sides (V) thereof, and folded in a predetermined order such that an upper flap (Ls) is external of and superposed on a lower flap (Li) and a superposing strip (S) develops horizontally, the device comprising:
- two batteries (3, 4) of heat-welding rollers (30, 40) symmetrically opposite one another, the rollers (30, 40) of each battery (3, 4) being arranged with relative axes thereof disposed vertically, the two batteries (3, 4) being mutually flanked and destined to intercept in succession a corresponding longitudinal vertical side (V) of the pack (C), also including the strip (S) for superposing on the flaps (Ls, Li) in order to heat the flaps (Ls, Li) up to a temperature which is sufficient to cause joining thereof by aggregation of a material of which the flaps (Ls, Li) and the strip (S) are made;
- tilting support means (31, 41) associated to each of the rollers (30, 40) and enabling each of the rollers (30, 40) to press elastically on the flaps (Ls, Li) in a transversal direction to the pack (C), consequently to intercepting of the longitudinal vertical side (V) and independently of the other rollers (30, 40);
- cooling means (5) arranged downstream of the batteries (3, 4) of rollers for acting on the flaps (Ls, Li) which have been superposed and heat- welded by the batteries (3, 4) of rollers, which cooling means (5) lower a temperature of the flaps (3, 4) and stabilize the joining thereof;
- means (2) for receiving the packs (C), at an end of a conveyor line (T) comprised in the packing machine, the means (2) for receiving also moving the packs (C) downstream of the packing machine, in a same direction, same orientation and with a velocity which is at least equal to a velocity of the conveyor line (T), for a tract of a length which enables the packs (C) to transit first to the batteries (3, 4) of heat-welding rollers and then to the cooling means (5).
Dependencies are inferred from the claim text.