Package making – With means responsive to a sensed condition – Of individual contents or group feed or delivery
Patent
1977-06-27
1978-10-03
McGehee, Travis S.
Package making
With means responsive to a sensed condition
Of individual contents or group feed or delivery
53551, 93 82, 177 60, B65B 1046, B65B 5714, B65B 908
Patent
active
041176472
ABSTRACT:
A web of flat polyethelene stock is drawn from a supply roll by a web feed mechanism, to be fed thereby up over a tube former then down, in tubular configuration, about a material fill pipe and then to and through pouch forming and weighing stations. A first spring biased nip roller, of the web feed mechanism, urges the flat polyethelene stock into engagement with one side of an appropriately powered drive roller, of the web feed mechanism, to effect the unreeling of the stock from the supply roll and to direct same up towards the tube former; while a second spring biased nip roller, of the web feed mechanism, urges the tubular stock into engagement with the other side of said drive roller to draw the stock down through said tube former and to and through said pouch forming and weighing stations. At the pouch forming station an "inverted -- T" shaped heat sealing assembly effects a horizontal top seal and severs a pouch previously filled to a predetermined weight; while simultaneously sealing the lower horizontal extremity of the tube and a predetermined length of the vertical unsealed edges of the tube stock to form a new pouch ready for filling. The web feed mechanism, pouch forming assembly, tube former, fill pipe and attendant mounting structure are all housed in and on a main frame which is pivotally mounted on a fulcrum located in line with the center of gravity of said main frame. A weight responsive load cell supports the front of said main frame in such a manner as to be responsive to material being deposited in the pouch as it is filled. Appropriate controls are provided to arrest the material feed at selected weights, for control of the web feed and heat sealing (pouch forming) operations, and to insure proper balancing of the main frame with respect to said load cell.
REFERENCES:
patent: 3301340 (1967-01-01), Lau
patent: 3583126 (1971-06-01), McCollough
patent: 3681892 (1972-08-01), Safranski
patent: 3762128 (1973-10-01), Persson et al.
McGehee Travis S.
Pollack Morris I.
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