Package making – Closing packages and filled receptacles – By means adapted to engage outturned seam of package cover
Reexamination Certificate
2005-03-29
2005-03-29
Smith, Scott A. (Department: 3721)
Package making
Closing packages and filled receptacles
By means adapted to engage outturned seam of package cover
C053S373700, C053S373900
Reexamination Certificate
active
06871475
ABSTRACT:
In a machine for making filter bags for infusion products, a flattened tube (34) is used which is made from a web (17) of filter paper that: is heat-sealable by thermal reactivation of a layer of glue; is fed continuously in the horizontal position; has individual charges (19) of the infusion product placed on its top surface at suitable intervals; and, lastly, is gradually folded onto itself until its longitudinal edges (18) are juxtaposed. An apparatus (250) for sealing the tube (34) comprises an operator block (94) bearing two rows (251) of emitters (96) designed to give off a gaseous fluid heated to a suitable temperature. The operator block (94), accommodated inside the tube (34) with the emitters (96) aligned and juxtaposed with the edges (18), directs the fluid against internal faces (97) of the tube (34) directly at the layer of glue on the web (17) which is simultaneously folded around the operator block (94) itself.
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European Search Report pertaining to European Application No. 03 42 5470.
Fay Sharpe Fagan Minnich & McKee LLP
Nash Brian
Smith Scott A.
Tecnomeccanica S.r.L.
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