Invention Grant
- Patent Title: Method and apparatus for making bags
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Application No.: US12159979Application Date: 2007-01-12
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Publication No.: US09751273B2Publication Date: 2017-09-05
- Inventor: Paul A. Selle , Kenneth C. Radtke , Charles H. Sauder , Paul A. Johnson , Christopher Lee White , Arvid R. Johnson , Gregory T. Prellwitz , Michael J. Stickney , Thomas C. Jansen , Christopher A. Saucier , Terry L. Leitzke , Bradley J. Schmoll
- Applicant: Paul A. Selle , Kenneth C. Radtke , Charles H. Sauder , Paul A. Johnson , Christopher Lee White , Arvid R. Johnson , Gregory T. Prellwitz , Michael J. Stickney , Thomas C. Jansen , Christopher A. Saucier , Terry L. Leitzke , Bradley J. Schmoll
- Applicant Address: US WI Appleton
- Assignee: CMD Corporation
- Current Assignee: CMD Corporation
- Current Assignee Address: US WI Appleton
- Agent George R. Corrigan
- International Application: PCT/US2007/000981 WO 20070112
- International Announcement: WO2007/084430 WO 20070726
- Main IPC: B31B27/14
- IPC: B31B27/14 ; B31B19/14 ; B29C65/10 ; B29C65/14 ; B29C65/16 ; B29C65/18 ; B29C65/38 ; B29C65/74 ; B31B1/74 ; B31B27/00 ; B29C65/30 ; B29C65/22 ; B31B1/10 ; B31B29/00 ; B29C65/00 ; B29C35/08 ; B29K23/00 ; B29C65/78 ; B29L31/00

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.
Public/Granted literature
- US20080312056A1 Method and Apparatus for Making Bags Public/Granted day:2008-12-18
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