Process and apparatus for reducing color contamination in the process recycle of zippered thermoplastic bags

Number of patents in Portfolio can not be more than 2000

United States of America Patent

PATENT NO 5066444
SERIAL NO

07548524

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ATTORNEY / AGENT: (SPONSORED)

Importance

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Abstract

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Disclosed are a process and apparatus for eliminating the problem of color contamination during product recycle in the manufacture of reclosable thermoplastic bags having zippers of a color different than that of the remainder of the bag. Process and apparatus for effecting same include extrusion of the colored thermoplastic material from a separate, smaller secondary extruder to avoid process shutdown during recycle, encapsulation of the colored thermoplastic material within the colorless flow melt to enhance transport of the colored flow melt, and placement of a dump valve between the secondary extruder and the feedblock to controllably interrupt the flow of the colored flow melt as desired. Further disclosed are an apparatus and process for effecting encapsulation of the colored flow melt.

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First Claim

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Patent Owner(s)

Patent OwnerAddressTotal Patents
S.C. JOHNSON HOME STORAGE, INC.RACINE, WI159

International Classification(s)

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Behr, R Douglas Midland, MI 18 575

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Patent Citation Ranking

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Patent Info (Count) # Cites Year
 
Minnesota Mining and Manufacturing Company (5)
5691026 Fastener member with a dual purpose cover sheet 30 1994
5691027 Fastener with a dual purpose cover sheet 36 1995
* 5725423 Abrading apparatus 20 1997
5902427 Fastener arrangement with dual purpose cover sheet 21 1997
* 5785784 Abrasive articles method of making same and abrading apparatus 41 1997
 
YKK CORPORATION (2)
* 6896759 Fastener strip with discrete magnetically attractable area, and method and apparatus of making same 16 2003
* 2003/0214,068 Fastener strip with discrete magnetically attractable area, and method and apparatus of making same 7 2003
 
REYNOLDS PRESTO PRODUCTS INC. (13)
6286999 Tamper-evident reclosable bag 103 1999
6071011 Fill-through-the-top package 71 1999
6148588 Fill-through-the-top package and method and apparatus for making the same 74 1999
6439770 Reclosable bags having a tamper-evident retaining member extending through a slider 41 2001
6419391 Reclosable bags having a tamper evident stepped member 26 2001
6663283 Reclosable bags having a tamper-evident member extending over a zipper proximate to a slider 24 2001
6575625 Reclosable bags having a removable member encapsulating a slider 18 2001
6712509 Reclosable bag having tamper-evident member attached to body panels along a line of weakness located below the rib and groove profiles of the bag zipper 34 2002
7008106 Reclosable bag having tamper-evident member removable from the bag along a line of weakness located below the bag zipper 8 2002
7040808 Reclosable bags with tamper evident features and methods of making the same 7 2003
RE39505 Fill-through-the-top package and method and apparatus for making the same 21 2003
7316641 Reclosable bags with tamper evident features and methods of making the same 3 2006
RE40284 Methods of making and filling a fill-through-the-top package 13 2006
 
VELCRO BVBA (1)
* 6066281 Fastener products and their production 10 1998
 
ILLINOIS TOOL WORKS INC. (1)
* 6149302 Plastic bag with tamper-evident closure 47 1999
 
Thunderbird Global Enterprises, LLC (1)
8070359 Plastic bag with pour spout and reinforced bottom end 14 2007
 
3M INNOVATIVE PROPERTIES COMPANY (8)
* 5505747 Method of making an abrasive article 138 1994
* 5672186 Method of making an abrasive article 54 1996
* 5667540 Method of making an abrasive article 23 1996
6579161 Abrasive article 12 1996
* 5840089 Method of making an abrasive article 55 1997
6579162 Abrasive article 15 2000
6884157 Abrasive article 6 2003
7044834 Abrasive article 5 2005
 
MINIGRIP LLC (3)
6217216 Reclosable plastic bag with non-perforated tear zone 30 1999
* 2009/0028,469 Method to accurately control size, velocity, and relative position sets of reclosable mechanism 0 2008
* 2011/0165,280 METHOD TO ACCURATELY CONTROL SIZE, VELOCITY, AND RELATIVE POSITION SETS OF RECLOSABLE MECHANISM 0 2011
 
PACTIV CORPORATION (1)
6279298 Fill-through-the-top package and method and apparatus for making the same 66 1999
 
W.E. HALL COMPANY (1)
* 5607530 Polymer diverter system for metal pipe having an integrally formed polymer liner 6 1995
 
REYNOLDS CONSUMER PRODUCTS INC. (6)
* 5198055 Method of forming recloseable packages, profiles used therein, and packages produced thereby 82 1991
* 5252281 Apparatus and method for manufacture of a multi-colored closure member of a closure profile 37 1992
* 5425911 Method for manufacture of integral reclosable bag 2 1993
* 5366294 Recloseable package having recloseable profile strips with a heat barrier 67 1993
7743474 Polymeric package closure and method 16 2006
* 2009/0154,843 POLYMERIC PACKAGE CLOSURE AND METHOD 15 2009
* Cited By Examiner