Package making – Methods – Enclosing contents within progressively formed web means
Patent
1981-05-20
1983-12-13
Culver, Horace M.
Package making
Methods
Enclosing contents within progressively formed web means
53476, 53550, 53371, 53378, 1562731, 53547, B65B 906, B65B 5126
Patent
active
044198558
ABSTRACT:
A static sealer for causing overlapping portions of film to adhere to each other preparatory to shrink-wrapping in an automatic wrapping machine comprising a grounded support having a planar surface and a charging head for generating an electrostatic field between the gounded support and charging head through which the overlapping portions of the film are moved rectilinearly to charge the latter oppositely, said grounded support being so designed as to reduce frictional resistance of the overlapping portions of the film to rectilinear tracking, said charging head being provided with discharge electrodes arranged with at least one electrode positioned medially of the path of travel of the seam and two other transversely-spaced electrodes downstream of the medially-positioned electrode.
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patent: 3784711 (1974-01-01), Kane
patent: 4025375 (1977-05-01), Leasure
Culver Horace M.
Pfund Charles E.
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