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7465265 |
Method for installing closure in mouth of pre-made bag
A method for installing a closure in the mouth of a pre-made flexible bag. The closure may, for example, be a shrouded plastic zipper with or without a slider. The bag may, for example, have side...
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6635002 |
Seal cutter for plastic bag
A seal cutter for a plastic bag includes a folding device, a conveyor device, a point cut-off device, a tension control device, and a coreless winding device. The folding device includes a...
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6471818 |
Procedure to fix a closed zipper-stripe inside a flexible container during its packaging
A process for applying a portion of a closed zipper inside a container of flexible material, in which a segment or portion of a closed zipper-strip is first applied by a fixing device upon the...
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6139479 |
Apparatus and method for manufacture of containers of variable length
An apparatus for manufacturing containers or bags includes a sealer that produces seals on a moving film. These seals are spaced at intervals that determine the length of the containers. An...
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5860905 |
System and method for making plastic film bags with headers, open mouths and sealed bottoms
A system for receiving tubular formed film comprising two facing walls and forming plastic bags having headers, open mouths and sealed bottoms into a block or stack of bags. The system includes an...
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5759333 |
Safety glove bag and method of making same
An apparatus for use in removing hazardous material I from an elongated pipe P comprises an elongated upper work section 41 from which a plurality of in-line lower debris collection and disposal...
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5741208 |
Environmental container liner and method of manufacture
A waste container liner and method of manufacture thereof are provided. The method involves the steps of flattening a continuous tubular web of pliable material to form two adjoining layers of...
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5690600 |
Retractable web separator
An apparatus (31) and a method are disclosed for temporarily separating multiple webs (51,53) while performing an operation (123,125,133) thereon, including the feeding of multiple webs (51,53),...
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5683340 |
Method of making easy open thermoplastic bag
There is provided a thermoplastic film bag having at least two integral members that facilitate opening the bag. The bag is manufactured from a flattened tube of thermoplastic material which may be...
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5662576 |
Method of manufacturing an improved bag for the cultivation of mushroom spawn and apparatus therefor
A method and apparatus for manufacturing an improved bag for the cultivation of mushroom spawn is provided. The bags have continuous gas permeable sealing strips sealed to the inside walls of the...
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5630779 |
Easy-open bag pack, method of forming and system
A system for suspending a pack of thermoplastic bags, loading bags, removing loaded bags and for automatically opening the next bag preparatory to loading it by having a pack of handled bags...
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5540644 |
Packing bag for light sensitive materials and manufacturing method therfore
A bag for packing a light-sensitive material is disclosed. The bag has an outermost surface and an innermost surface and is essentially consisting of a material for making the bag which comprises...
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5286248 |
Flexible pouch with folded spout
A flexible pouch formed from a single sheet of plastic material folded over upon itself along an umbrella like fold assembly to provide the opposed walls of a chamber for storing a product and an...
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5273514 |
Method for making a flexible pouch
A flexible pouch is made having a gusseted bottom structure and an inwardly folded top structure from two webs. A first web is folded over on itself to form an inverted U-shape portion and excess...
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5273511 |
Method to improve welding of profiled plastic film or tape
A method for providing a welded side seam area in a plastic bag or package having interlocking male and female profile sections on plies of plastic sheeting material includes the provision of...
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5273362 |
Stand up plastic bag and method of manufacture
Containers are produced from a sheet of flexible material having a thermally bondable inside surface. In one embodiment flaps are formed and folded outwardly to form two windows in the sheet....
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5254073 |
Method of making a vented pouch
A vented pouch is described which comprises: first and second opposed panels; a base gusset; and, a gas filter arrangement oriented in one of the panels. The gusset member is preferably oriented...
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5244450 |
Process of making blocks of bags
To make blocks of bags having blocked stubs, which are joined by perforation lines substantially only to the lower opening-defining edge of each block, which lower edge is separated by a...
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5242365 |
Process for manufacturing package having separable overlay
A package having a separable overlay is formed by a high speed web roll manufacturing method and adapted for multiple marketing of retail goods. The package has at least three layered sheets of...
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5226858 |
Method and apparatus for producing bags interconnected at their open ends
A method and apparatus for producing bags interconnected at their open ends by forming transverse seals across a flattened longitudinal tube of film material and utilizing a cutting die to cut a...
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5203758 |
Method for manufacturing a sack or bag with a bottom being rectangular in the filled state and with a handle, and a sack or bag manufactured in accordance with said method
This invention relates to a method for manufacturing a sack or bag with a bottom being rectangular in the filled state and with a handle portion, and it also relates to sacks or bags manufactured...
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5127893 |
Method of making scrapless collapsible bag with circumferentially spaced reinforced strips
A reinforced collapsible bag and method of making it from blanks of a flexible woven material which are cut from an elongate web substantially without wasting any material between adjacent blanks...
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5098364 |
Waste container liner and method for manufacturing same
A method for manufacturing a liner for a waste container is provided, comprising the steps of extruding a flexible envelope, the envelope having ends; flattening the envelope so as to form a top...
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5096516 |
Method of making dual reuseable pouches
Dual flexible plastic pouches and a method of making the pouches where the pouches are reuseable and reclosable and have a double fastener strip arranged along the center between the pouches, the...
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5080643 |
Method of making a stand-up plastic bag
An improved method of making a stand-up plastic bag in which the side seam seals are formed at the same time as the gusset wall seals. The method includes the steps of supplying the film, folding...
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5078667 |
Thermoplastic handled bags and their method of manufacture
The instant invention relates to a handled thermoplastic bag made of a thermoplastic film comprising a high density polyethylene or a major amount of high density polyethylene and a minor amount of...
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4995860 |
Easy opening bag pack and supporting rack system and fabricating method
An easy opening bag pack and supporting rack system is provided which includes a plurality of gussetted bags of the T-shirt type or of the flat top type provided with bag mounting apertures through...
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4974968 |
Bag having holes for retaining pins
A tubular bag is made of synthetic thermoplastic material preferably provided with side gussets. The bag is closed at one end by a transverse seam weld and at the other end has an opening which is...
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4954124 |
Stand-up plastic bag and method of making same
A stand-up plastic bag has a pair of front and rear side walls defining an open bag mouth at upper edges thereof, and a pair of front and rear bottom gusset walls being disposed between the side...
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4950217 |
Bag making machine with coupling-controlled perforating and welding
An arrangement in a bag-making machine for forming bag-defining lines of perforation and weld lines in an elongate web (7) comprises a driven roller nip including a nip roller (4) and a backup...
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4946431 |
Apparatus for the manufacture of block-sealed side-gussetted bags
A method for making block of side-gussetted, bottom-weld bags. Each bag has an opening on one side to fascilitate the removal of individual bags from the block.
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4931034 |
Bags made from thermoplastic synthetic resin sheeting having cutoff weld seams and process for producing the bags
A process for the production of bags from thermoplastic synthetic resin sheeting with a bottom seam and/or a lateral seam fashioned as a cutoff weld seam obtained by severing tubular film sheets in...
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4931033 |
Plastic bag construction
A method of making plastic bags in an in-line production stream having hand holes reinforced by double ply plastic material in which the molecular orientation of the plastic material extends across...
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4906228 |
Method and apparatus for the manufacture of plastic bags in pairs with side seams
The invention relates to a process and apparatus for the paired manufacture of carry bags from synthetic resin sheeting with lateral weld seams and an approximately sinusoidal load-bearing rim with...
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RE33173 |
Envelope with pouch and method of manufacture thereof
A method of producing an envelope having an integrally formed external pouch on one side for accommodating a despatch note, waybill or the like, comprises the steps of longitudinally folding a...
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4889523 |
Tearable package of synthetic thermoplastic foil and device and method for producing the same
A package includes an upper wall, a lower wall and two side folds provided with folds. A tearable flap is provided at a filling opening of the package. The flap is provided with two suspension...
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4857037 |
Portable packing bag made of plastic film, and method of producing the same
A portable packing bag made of plastic film for carrying flexible and/or folded products includes rectangular front and rear side panel sections which are (a) joined, one to the other, at their...
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4856396 |
Apparatus for selectively forming apertures or holes or venting pinholes in a continuously moving web
Apparatus for selectively forming a continuously moving web (5) with apertures or holes by means of a punching mechanism consisting of a rotating die (26) and a rotating punch (14) and with venting...
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4840610 |
Thermoplastic bag, bag pack and method of making the same
A method for forming a thermoplastic film handled bag comprising: forming a continuous collapsed thermoplastic tube having heat seal lines across the width of said tube at bag length intervals,...
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4838977 |
Process and apparatus for making plastic carrying bags or sacks
To make plastic carrying bags or sacks, sections are cut or are severed by hot wire welding from a gusseted tubular film by a formation of transverse seam welds and transverse severing cuts or by...
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4816104 |
Methods and systems for preparing flat-bottom thermoplastic sack
A method and system for preparing flat bottom thermoplastic sacks comprising process steps and means for forming a tube of thermoplastic film, collapsing said tube while forming two oppositely...
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4798572 |
Collapsible bag and method
A collapsible bag and method of making it from blanks of a flexible material which are cut from an elongate web substantially without wasting any material between adjacent blanks. Each blank has a...
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4790803 |
Method of making bottom gusset bag pad arrangement for liquid containers
The method of making from tube stock the bag pad arrangement of parent application Ser. No. 068,062 that is concerned with bagging a pair of liquid containers, such as containers for carry out for...
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4764030 |
Part bottom seal of chain of gusseted bags and machine therefor
A chain of bags is disclosed, with each having first and second panels and gusseted sides. The chain of bags is provided with a transverse bottom seal which in the central portion seals together...
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4759742 |
Process of making T-shirt bags
In a process of making T-shirt bags a flat tubular film that is provided on each side with at least one gusset is provided with top end seam welds, which close the gusset portions to form handle...
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4704101 |
Method for making a puncture resistant bag
A seamless, puncture resistant bag is made by advancing a lay-flat seamless tube of thermoplastic film; forming an alternating series of fused-unfused segments along said lay-flat tube by...
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4571235 |
Methods for preparing flat-bottom thermoplastic sack and systems therefore
A method and system for preparing flat bottom thermoplastic sacks comprising process steps and means for forming a tube of thermoplastic film, collapsing said tube while forming two oppositely...
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4493685 |
Method of making tubular bag
In making a tubular bag, a first band of thermosetting glue is printed across the length of a web, and a second and third band of such glue is printed on the opposite side of the web in registry...
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4352669 |
Process and apparatus for manufacturing plastic containers
An automated system is provided for manufacturing flexible plastic blood containers (10) having closed ports (22, 24) and a donor tube (26) extending from one end (20) of the containers. First...
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4342564 |
Apparatus for the stacking and connection of synthetic-resin foil bags
A flattened tube of synthetic resin is heat-sealed along a leading edge and a multiplicity of perforations are punched along an arcuate line spaced from and convex towards the sealed tube end. The...
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