Manufacturing container or tube from paper; or other manufacturi – Container making – Pliable container
Reexamination Certificate
2006-01-13
2008-11-04
Harmon, Christopher (Department: 3721)
Manufacturing container or tube from paper; or other manufacturi
Container making
Pliable container
C493S194000, C493S199000, C493S205000, C493S208000, C493S238000, C493S365000, C083S171000, C083S651100, C083S678000
Reexamination Certificate
active
07445590
ABSTRACT:
A machine and method for making bags is described and includes a web traveling from an input section to a rotary drum, to an output section. The rotary drum includes at least one seal bar, having a first sealing zone, and an adjacent weakening zone. The weakening zone may be a heated perforator, includes a heating wire, or be disposed to create an auxiliary sealed area. The heating wire can have, connected thereto, a source of power that is at an adjustable voltage or magnitude, and/or pulsed, and/or a feedback loop. The heating wire may be an NiCr wire and make intermittent contact with the web and be disposed in an insert. The weakening zone may create a line of weakness that is uniform or varies in intensity, is a separating zone, or includes a heat film, a toothed blade, a row of pins, a source of air, or a source of vacuum. The sealing zones may include temperature zones, cartridge heaters, cooling air, or heated air, or a source of ultrasonic, microwave or radiative energy.
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Jansen Thomas C.
Johnson Arvid R.
Johnson Paul A.
Leitzke Terry L.
Prellwitz Gregory T.
CMD Corporation
Corrigan George R.
Harmon Christopher
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