Apparatus for wrapping stacked compressible materials in a thermo-shrinkable plastics film专利检索-冷停堆核能专利检索查询-专利查询网

Apparatus for wrapping stacked compressible materials in a thermo-shrinkable plastics film

阅读：562发布：2022-06-28

专利汇可以提供Apparatus for wrapping stacked compressible materials in a thermo-shrinkable plastics film专利检索，专利查询，专利分析的服务。并且An apparatus for wrapping stacked compressible materials in thermo-shrinkable plastics film and capable of operating in a continuous sequence on consecutive stacks. The apparatus having a wrapping, a heating and a cooling station provided respectively, with lower first, second and third consecutively aligned roller conveyers, which are at the same level and are driven independently at desired times to convey a stack into and out of each station in turn and halting the stack in each station for a desired period. Each station is provided with an upper press member having an upper conveyer mounted on its underside driven in synchronism with the corresponding lower conveyer. The upper conveyers at the heating and cooling stations are maintained at the same level as the upper conveyer at the wrapping station so that the compression of the stack achieved at the wrapping station is maintained at the other two stations during the film shrinking process.，下面是Apparatus for wrapping stacked compressible materials in a thermo-shrinkable plastics film专利的具体信息内容。

权利要求

1. A continuously operating shrink film wrapping apparatus comprising, in combination, a horizontal anti-friction conveyor means for supporting for advancement along a linear path, a pallet carrying an article to be wrapped, said article being covered by a shrinkable plastic film, a compression zone at an upstream position along said path, said zone including a planar pressure plate means in parallel spaced relation to said conveyor means and shiftable toward and away therefrom for squeezing said article between said plate means and conveyor means, drive means on said pressure plate means for engaging the film portion above the upper surface of said article and advancing said compressed article along said path, a heating zone adjacent and downstream of said compression zone positioned to receive articles compressed at said compression zone, said heating zone including a second compression plate means in parallel spaced relation to said conveyor and shiftable toward and away from said conveyor, said second plate means including second drive means for engaging the film above the upper surface of said article and advancing said article in said direction, heating means at said heating zone for heating said film as the same traverses said zone, and a cooling zone along said patch adjacent and in downstream relation to said heating zone, said cooling zone including a third compression plate means in parallEl spaced relation to said conveyor, said third plate means including third drive means for engaging said film above the upper surface of the article emerging from said heat zone and advancing the same along said path, the spacing of said first, second and third drive means from said conveyor being substantially identical, whereby said article and film are subjected to a constant compressive force as the same traverse said path.

2. Apparatus in accordance with claim 1 wherein said heating zone includes a heat chamber, the upper surface of which is defined by said second drive means, said chamber including upper and lower, telescopically interfitting, vertically relatively movable half shells, said half shells having open portions at their upstream and downstream ends to permit passage therethrough of said article and film.

3. Apparatus in accordance with claim 2 wherein said heating chamber includes upstream and downstream door portions shiftable in a direction normal to said path between first and second positions, respectively, forming with said ends of said half shells a substantially air impervious enclosure, and in clearing relation of said ends.

4. Apparatus in accordance with claim 3 wherein said upper half shell includes an internal sleeve resistant to heat and adapted to be disposed about said article and film, said sleeve and upper half shell defining therebetween an annular space for the circulation of heated air.

5. Apparatus in accordance with claim 1 wherein at least one of said drive means comprises a plurality of rollers mounted on a said plate means, the lower peripheries of said rollers being in coplanar alignment, and an endless anti-friction belt arrayed about said rollers and having a lower flight engaged against said lower peripheries.

6. Apparatus in accordance with claim 5 and including means for directing a source of cooling fluid against said rollers.

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Apparatus for wrapping stacked compressible materials in a thermo-shrinkable plastics film

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