Search Images Maps Play YouTube News Gmail Drive More »
Sign in
Screen reader users: click this link for accessible mode. Accessible mode has the same essential features but works better with your reader.

Patents

  1. Advanced Patent Search
Publication numberUS3255951 A
Publication typeGrant
Publication dateJun 14, 1966
Filing dateOct 29, 1964
Priority dateNov 1, 1963
Publication numberUS 3255951 A, US 3255951A, US-A-3255951, US3255951 A, US3255951A
InventorsHung Kay Chan
Original AssigneePolson Ind Company
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Synthetic plastic bags
US 3255951 A
Abstract  available in
Images(1)
Previous page
Next page
Claims  available in
Description  (OCR text may contain errors)

June 14, 1966 CHAN HUNG KAY 3,255,951

SYNTHETIC PLASTIC BAGS Filed Oct. 29, 1964 United States Patent 3,255,951 SYNTHETIC PLASTIC BAGS Chan Hung Kay, Hong Kong, assignor to Polson Industries Company Filed Oct. 29, 1964, Ser. No. 407,478 Claims priority, application Great Britain, Nov. 1, 1963, 43,175/ 63 1 Claim. (Cl. 229-54) This invention relates to synthetic plastic bags.

It has previously been proposed to make synthetic plastic bags by forming a tube of synthetic plastic ma terial. The tube is then flattened and heat sealed along one open end to form the bottom of the bag, the other end being left open to form the mouth of the bag. It has also been proposed to form carrying handles in such a bag by providing co-operating shaped apertures in each side of the bag, these apertures being reinforced around their edges against tearing by a thin peripheral strip of substantially rigid synthetic plastic material heat sealed or otherwise secured to the material of the bag. This form of reinforcement results in a bag having a mouth whose edges formed by the sides of the bag are soft and flexible and are therefore liable to distort or even tear during use of the bag.

An object of the present invention is to provide an improved form of synthetic plastic carrier bag.

According to the present invention there is provided a synthetic plastic bag having a reinforcing strip adhesively secured along each mouth forming edge of the bag, and in each of which strips a carrying aperture is formed.

Preferably the reinforcing strip is of cardboard, stiff paper or the like.

An embodiment of the invention is illustrated in the accompanying drawing which is a perspective view of a part of a bag.

ice

A synthetic plastic carrier bag comprises a tube 1 of thin polyethylene. The tube is flattened and one end is heat sealed to form the 'bottom of the bag (not shown in the drawing). The remaining open mouth-forming end of the tube is provided with reinforcing strips 2 and 3 of cardboard which are adhesively secured by a chemical adhesive along the inside surface of each of the two edges which form the mouth of the bag. The depth of each strip of cardboard is sufiicient to allow shaped carrying apertures 4 and 5 to be cut in the strips and the sides of the bag to which they are secured.

With carrier bags of polyethylene as described above, a stronger bag than previously proposed plastic bags is obtained. Also polyethlylene of a gauge less than what has previoulsy been proposed for such bags can be employed.

What Iclaim is:

A bag comprising a tube generally rectangular in cross section of polyethylene or the like, said tube being sealed at one end to form the bottom of the bag, a reinforcing strip of cardboard adhesively secured to each inner surface of the longer sides of said tube at the opposite end with the outer edges of said strips substantially coinciding with the edges of said tube at said opposite end, and said tube and strips having aligned carrying apertures extending therethrough. 1

References Cited by the Examiner UNITED STATES PATENTS 1,418,001 5/1922 Kniep 229-54 2,516,266 7/1950 Simpson 229-54 3,132,472 5/1964 Shapiro er al. 229 54 JOSEPH R. LECLAIR, Primary Examiner.

D. M. BOCKENEK, Assistant Examiner.

Patent Citations
Cited PatentFiling datePublication dateApplicantTitle
US1418001 *Jun 14, 1920May 30, 1922Graham Paper CompanyShopper's bag
US2516266 *May 22, 1948Jul 25, 1950Cohoes Envelope Company IncParcel bag
US3132472 *Sep 8, 1959May 12, 1964Crane CoThermal actuator
Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US3402749 *Mar 10, 1967Sep 24, 1968Minigrip IncPlastic film shopping bag
US3414032 *Mar 3, 1967Dec 3, 1968Annikki JortikkaShopping bags
US3447737 *Mar 6, 1968Jun 3, 1969Mahr MalcolmCarrier containers
US3462069 *Jan 22, 1968Aug 19, 1969Suominen Heikki SThermoplastic carrier bags
US3468470 *Nov 24, 1967Sep 23, 1969K H Sengewald DrCarrier bag
US3490507 *Apr 22, 1968Jan 20, 1970Bemberg AgCarrying bag
US3502258 *Jun 27, 1968Mar 24, 1970Kugler EmanuelGusset bag with closure
US3506185 *Jun 28, 1968Apr 14, 1970Christensen Rolles FabShopping bag
US4597749 *Jun 25, 1985Jul 1, 1986Mobil Oil CorporationThermoplastic bag having reinforced handles and method of manufacture
US4790670 *Jan 11, 1985Dec 13, 1988Poly-Pak Industries, Inc.Bag with closeable flap and method of manufacturing same
US5015103 *Aug 15, 1990May 14, 1991Plastic Packing, Inc.Side loadable bag
US5048976 *May 10, 1989Sep 17, 1991Unilever Patent Holdings B.V.Carrier bag
US7163339 *Apr 16, 2001Jan 16, 2007Plaspack U.S.A., Inc.Composite breathable produce bag with a reinforced mesh sidewall
US7640715Sep 19, 2006Jan 5, 2010Plaspack Usa, Inc.Multi-material vertical form, fill and seal bag forming method
US7837388May 9, 2003Nov 23, 2010Plaspack Usa, Inc.Multi-material vertical form, fill and seal bag
US7909161Jul 31, 2007Mar 22, 2011Belkin International, Inc.Case configured to hold portable computer and method of manufacturing and using the same
US8550717Sep 2, 2010Oct 8, 2013Plaspack U.S.A., Inc.Composite breathable produce bag with a reinforced mesh sidewall
US8784967Oct 7, 2010Jul 22, 2014Volm Companies, Inc.Open mesh material and bags made therefrom
US9132939Aug 23, 2013Sep 15, 2015Waterview Innovation, LlcReusable multi-purpose bag formed of nonwoven fibrous material
US9132940 *Apr 9, 2014Sep 15, 2015Waterview Innovation, LlcReusable multi-purpose bag formed of nonwoven fibrous material
US9266647 *Nov 7, 2012Feb 23, 2016Waterview Innovation, LlcReusable shopping bag having multiple secondary uses
US9339986Jun 30, 2014May 17, 2016Volm Companies, Inc.Open mesh material and bags made therefrom
US9573342Mar 13, 2013Feb 21, 2017Volm Companies, Inc.Open-mesh bags and methods of production
US9630375Mar 13, 2013Apr 25, 2017Volm Companies, Inc.Form, fill, and seal bags and method of production
US20070011992 *Sep 19, 2006Jan 18, 2007Plaspack Usa, Inc.Multi-Material Vertical Form, Fill and Seal Bag Forming Method
US20100006384 *Jun 30, 2009Jan 14, 2010Belkin International, Inc.Portable electronic device carrier
US20110085749 *Oct 7, 2010Apr 14, 2011Volm Companies, Inc.Open Mesh Material and Bags Made Therefrom
US20140205210 *Apr 9, 2014Jul 24, 2014Waterview Innovation, LlcReusable Multi-Purpose Bag Formed of Nonwoven Fibrous Material
Classifications
U.S. Classification383/10
International ClassificationB65D33/08, B65D33/06
Cooperative ClassificationB65D33/08
European ClassificationB65D33/08