Packaging machine
AssigneeTokyo Automatic Machinery Works, Ltd.
InventorShizuo Takahashi
Life of this patent
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Abstract
A stretch wrap packaging machine packages articles received on trays, and can handle various different article geometries and tray sizes without modification. In an initial phase of a wrapping operation film is sleeve wrapped around an article and tray by elevating the article and tray upwardly against a horizontally stretched length of film to draw the film over the article and tray and downwardly along and beyond both ends of the article and tray, and by then joining the downwardly extending film portions below the tray and cutting them from the film supply through the use of a heat-seal and cut-off device having a heated wire which supplies heat to the film, to perform the heat-seal and cut-off functions, by radiation and without engaging the film.
Claims18
A packaging machine comprising tension means for delivering stretchable strip films under proper tension, an elevator means having supporting upright arms for pushing up an article to be wrapped from the bottom into engagement with film positioned horizontally by means of said tension means to wrap the upper surface of the article and form two downwardly extending film portions at opposite ends of the article, a heat sealing and cutting means for folding said two downwardly extending film portions toward one another below said article to form a sleeve and for heat-sealing said film portions to one another and cutting them from the remainder of the film supplied by said tension means by means of radiation heat from a heater, a pinching means for pinching and pulling the both open sides of said sleeve to fold them down to the bottom of said article, and a heat sealing means for heat-sealing the so folded sides of said sleeves.
In a packaging machine for wrapping articles in heat sealable film, a heat-sealing and cutting mechanism comprising a frame assembly including a pair of opposing frames, means supporting said frames for relative movement in a horizontal direction toward and away from each other between closed and opened positions respectively, a pair of axially parallel and vertically spaced apart rolls journalled on each of said frames, respectively, and arranged in generally opposing relation to the rolls on the other of said frames, a pair of vertically spaced apart film carriers mounted on each of said frames, respectively, between the rolls thereon and arranged in opposing relation to associated film carriers on the other of said frames, said film carriers on each of said frame being movable into pinching relation with said associated film carriers on the other of said frames, and radiant heating means supported on one of said frames between said film carriers to move relative to the other of said frames for sealing and cutting film.
Dependencies are inferred from the claim text.