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Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
W. R. Grace & Co., Cryovac Div. Patents
Assignee:
W. R. Grace & Co., Cryovac Div.
Address:
Duncan, SC
No. of patents:
86
Patents:


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Patent Number Title Of Patent Date Issued
D295910 Container for vacuum cleaner accessories May 24, 1988
D295334 Container for vacuum cleaner accessories April 19, 1988
D294756 Wall mounted holder for vacuum cleaner accessories March 15, 1988
D291558 Container for carrying, transporting, shipping, or installing circuit boards August 25, 1987
D280383 Packaging tray September 3, 1985
4778557 Multi-stage corona laminator October 18, 1988
A multi-stage corona laminator may be used to produce a relatively thick, i.e., 10 mils or greater corona bonded laminate characterized by low dielectric build-up, and preferably the presence of one or more oriented layers within the laminate material.
4768411 Easy-open bag and apparatus and method for making same September 6, 1988
A bag and a method and apparatus for forming an easy open bag in a vertical form-fill-seal process wherein a bag is formed from a sheet of thermoplastic film and a heat seal betwee bags as they are filled serves as the top closure for the lower bag and a bottom closure for the upper
4765857 Protective patch for shrinkable bag August 23, 1988
Disclosed is a protective patch for biaxially a heat shrinkable, thermoplastic vacuum bag for protecting the bag from puncture by sharp protruding bones in bone-in cuts of meat which are vacuum packaged within the bags. The patch is made from multi-layer film and preferably comprises
4763781 Container for printed circuit boards August 16, 1988
A storage container for electrostatic discharge sensitive devices comprises an enclosable polymeric outer shell, a polymeric inner shell disposed within the outer shell, grooves in the inner shell for accommodating electrostatic discharge sensitive devices, and means for affixing the
4761080 Multilayer gusseted bag with reverse fin seals August 2, 1988
A gusseted bag is provided which, according to a preferred mode, is constructed of thermoplastic multilayer film with an outer sealing layer and has a seamless folded bottom and reverse-fin-sealed sides. Advantageously, the starting material for such bags is lay-flat tubular film cut
4755436 Inter-ply adhesion between saran and linear ethylene copolymers July 5, 1988
A multi-layer film is disclosed having improved adhesion between layers and consisting essentially of the following elements:(a) a layer consisting essentially of vinylidene chloride copolymer; and,(b) a layer consisting essentially of about 5-40 wt. % of ethylene/butyl-acrylate copolymer ha
4755419 Oxygen barrier oriented shrink film July 5, 1988
A coextruded multiple layer oriented film comprises a core layer of ethylene vinyl alcohol copolymer, and two intermediate layers each comprising a polyamide. Two outer layers comprising polymeric materials or blends of polymeric materials such as (a) linear low and linear medium den
4755403 Protective patch for shrinkable bag July 5, 1988
Disclosed is a protective patch for a biaxially heat shrinkable, thermoplastic vacuum bag for protecting the bag from puncture by sharp protruding bones in bone-in cuts of meat which are vacuum packaged within the bags. The patch is made from multi-layer film and comprises a layer of
4755402 Thermoplastic multi-layer barrier packaging film and bags made therefrom July 5, 1988
Disclosed is a multi-layer heat-shrinkable (oriented) film having a barrier layer of polyvinylidene chloride copolymer and having an outer layer of polyamide. The polyamide layer is directly adhered to the barrier layer. Also disclosed is a method to make the film and barrier bags made
4753700 Packaging film June 28, 1988
A multilayer film useful in the packaging of high acid food products at elevated temperatures comprises a core layer of ethylene vinyl alcohol copolymer, two intermediate layers each comprising a polyamide; outer blend layers of linear low density polyethylene and anti-blocking agent,
4746562 Packaging film May 24, 1988
A multilayer film useful in the packaging of high acid food products at elevated temperatures comprises a core layer of ethylene vinyl alcohol copolymer, two intermediate layers each comprising a polyamide; outer blend layers of linear low density polyethylene and anti-blocking agent,
4743324 Printing plate mounter May 10, 1988
An apparatus for mounting a flexible printing plate on a printing cylinder comprises a table comprising a planar surface and two separable sections, whereby the sections when separated can accommodate therebetween an upper surface of the printing cylinder. The printing plate is aligned o
4735855 Thermoformable laminate April 5, 1988
A thermoformable polymeric laminate with good optical properties, extended shelf life, and memory characteristics comprises a core layer comprising an oxygen barrier material; a polyamide layer disposed on each surface respectively of the core layer, the polyamide having controlled c
4729926 Packaging material for long-term storage of shelf stable food products and method of making same March 8, 1988
A thermoplastic laminate suitable for long-term storage of shelf stable food products includes a first substrate comprising a layer of ethylene vinyl alcohol copolymer and a layer of a polyamide; and a second substrate bonded to the first substrate and comprising a vinylidene chloride
4729476 Easy open shrinkable laminate March 8, 1988
An easily opened package suitable for food products such as ring sausage and the like includes a first web with a sealant layer of ethylene vinyl acetate copolymer and an ionomer, and a second web including a sealant layer of an ionomer. A resulting package exhibits good self-welding
4729209 Apparatus and method for inserting pouches into boxes March 8, 1988
An apparatus and method for inserting pouches into boxes or lining boxes with pouches is disclosed. Rather than manually line boxes, the apparatus takes a pouch from a horizontal stack of pouches, opens the pouch over an open box, partially inflates the pouch, and, inserts the pouch into
4726997 Chemically stabilized film February 23, 1988
In a multilayer flexible film suitable for medical solution packaging, film-derived extractables are controlled by the use of a small amount of a high molecular weight stabilizer in the outer layer of the film. Solution pH can be controlled by the addition of a carbonate of an alkali met
4724185 Oxygen barrier oriented film February 9, 1988
A coextruded multiple layer oriented film comprises a core layer of a blend of ethylene vinyl alcohol copolymer and polyamide, two intermediate adhesive layers, and two outer layers of a blend of linear low density polyethylene, linear medium density polyethylene, and ethylene vinyl
4722167 Non-smear food package and process for making same February 2, 1988
Smearing of fat by fat-containing trayed food products on the interior surface of a thermoplastic overwrap is substantially reduced or eliminated by applying loading forces during a sealing step to the longitudinal edges of the tray containing food product. A tray with a convex bottom is
4719741 Cross seal cooling for vertical form fill seal apparatus January 19, 1988
A method and apparatus for improving transverse seal strength in a vertical form-fill-seal machine includes directing a cooling medium on a just formed transverse seal from an area beneath and on either side of the film, in an arcuate pattern to effect cooling during at least a portion o
4709532 Vertical form-fill seal process and machine with product catching device December 1, 1987
A vertical form, fill, and seal process and apparatus for individually packaging easily bruised articles of produce such as apples, pears, tomatoes, etc. by catching each article as it is dropped through a tube of thermoplastic, heat sealable film and simultaneously sealing and severing
4704843 Apparatus and method for packaging articles November 10, 1987
Conventional horizontal form-fill-seal equipment for packaging articles such as cheese can be improved by the use of shrink barrier films. In conjunction with the use of such films, the improvement includes means for supporting the film prior to longitudinally sealing to form a tube, and
4704101 Method for making a puncture resistant bag November 3, 1987
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 internally fusing said lay-flat tube at regular intervals, the unfused segment length being approxim
4698111 Vinylidene chloride composition and film made therefrom October 6, 1987
This invention relates to films made from vinylidene chloride polymers or copolymers. Specifically, this invention relates to a method and composition for lowering the oxygen permeability and enhancing the thermal stability of mono-layer and multi-layer packaging films having a plast
4693372 Taped bag chain with cassette September 15, 1987
A bag chain for feeding packaging bags to a bag loader includes bags 2a,2b,2c imbricated and carried by a pair of parallel carrier tapes 3 and 4 which are wound up on spools 8 and 9 of a cassette 5. Loading the bag chain is a bag indexing drive unit involves simply placing the cassette 5
4687711 Silent film for ostomy pouches August 18, 1987
This invention relates to films which have a high degree of silence and pliability and comprise at least one layer formed from a polymeric blend which includes about 40% to 60% by weight of any ethylene and vinyl-acetate copolymer and about 60% to 40% by weight of an elastomeric poly
4686148 Vinylidene chloride composition and film made therefrom August 11, 1987
This invention relates to films made from vinylidene chloride polymers or copolymers. Specifically, this invention relates to a method and composition for lowering the oxygen permeability and enhancing the thermal stability of mono-layer and multi-layer packaging films having a plast
4684573 High oxygen barrier composite film August 4, 1987
High oxygen barrier characteristics over a wide range of humidity conditions are obtained by providing a combination of ethylene vinyl alcohol copolymer and vinylidene chloride copolymer in separate component films of a composite film.
4680340 Easy to open package and a method of making same July 14, 1987
A seal layer for an easy open package consisting essentially of 40% or less, by weight, of a first polymer having a melt flow index of less than 5 selected from the group consisting of ionomers and ethylene-vinyl acetate copolymers, and 60% or more by weight of a second polymer having a
4671047 Form-fill-seal machine June 9, 1987
A forming shoulder for an HFFS machine comprises a pair of side wires 3a and 3b each comprising an upper limb 11 joined to a lower limb 14 at an elbow 12 and each supported near a respective end of a support bar 16. The width of the tube, defined by side walls where the tube passes inwar
4643943 Multi-layer polyolefin shrink film February 17, 1987
A five layered thermoplastic film may be utilized to form storm windows or packaging material. A preferred embodiment of the film comprises a core layer consisting essentially of either (a) a copolymer of ethylene and vinyl acetate or (b) a three component blend of (a) a linear low densi
4643926 Flexible medical solution pouches February 17, 1987
A flexible film suitable for medical solution pouches and parenteral materials generally includes a sealant layer of ethylene propylene copolymer, modified ethylene propylene copolymer, or flexible copolyester; one or more interior layers including elastomeric polymeric materials, and
4640856 Multi-layer packaging film and receptacles made therefrom February 3, 1987
Improved shrink, toughness and barrier properties are achieved by a multi-layer, thermoplastic, shrink film having a substrate layer of very low density polyethylene and a gas barrier layer of vinylidene chloride copolymer or ethylene-vinyl-alcohol. The film is particularly useful for
4638913 Multiply package having delaminating easy open seal January 27, 1987
Disclosed is a package for cheese, luncheon meat and the like having an easy open seal. The package comprises a pouch-like receptacle constructed from flexible thermoplastic film having at least two layers wherein the outer surface layer has a tensile strength greater than the bond stren
4635295 Taped bag with extended side seals January 6, 1987
The invention is directed to an improvement in flexible side-sealed taped bags having an extended lip rear panel. The external surface of the rear panel is releasably secured, at least at one point, to at least one tape (preferably two tapes) whereby a plurality of the bags may be ad
4617241 Linear polyethylene stretch/shrink films October 14, 1986
A multi-layered thermoplastic polyolefin film having an improved combination of physical characteristics is disclosed. In particular, the multi-layered film evidences an improved combination of elongation, elastic memory, tear resistance and heat shrinkability. Preferred five layer e
4616472 Method and apparatus for loading side-seal bags October 14, 1986
A method and apparatus for automatically loading side seal bags, at least two at a time, which comprises delivering the bags to a first position below a rod conveyor which has a gap therein through which the bags are pulled and loaded in a second position. The bags are then conveyed away
4612245 Blown bubble process for producing oriented thin films September 16, 1986
The present invention comprises an improvement upon the blown bubble process for forming thin heat sealable films from an extruded tubular structure. The utilization of a spray nozzle, internal to the extruded tubular structure, to provide a thin inner coating of a liquid polyorganos
4611728 Bag dispensing package September 16, 1986
A package of imbricated bags is provided that is adapted for dispensing and opening such bags one at a time. The package includes a chain of adhesively imbricated bags in overlying sequence, each bag being adhesively but releasably attached to adjacent bags and having an open mouth e
4611456 Process for making a vacuum skin package and product formed thereby September 16, 1986
The invention relates to a method of forming containers useful in vacuum packaging applications which require that the packaged product be wrapped in an air-impervious enclosure.According to one aspect of the invention, the method comprises a step wherein a substrate of an air pervious,
4608302 Oriented films from propylene copolymers and unplasticized saran August 26, 1986
A heat-shrinkable thermoplastic film includes a food contact layer; a second layer of propylene homopolymer or copolymer, ethylene copolymer, butylene homopolymer or blends thereof; an adhesive layer; a layer of unplasticized vinylidene chloride copolymer; another adhesive layer; and
4606922 Cook-in meat packaging August 19, 1986
A method is provided for enhancing yield of a cook-in packaged meat product that includes first providing an adhering cook-in container including a flexible thermoplastic envelope being substantially conformable to a contained meat product and having an inner surface of a selectively
4605460 Method of laminating high barrier shrink film August 12, 1986
There is provided a heat shrinkable, high barrier laminate film which includes a hot blown, melt oriented high oxygen barrier film, of relatively high crystallinity and correspondingly relatively low ultimate elongation, laminated to a stretch oriented base film having a shrink tensi
4601159 Form-fill-seal machine and method with capability for providing a vacuum or inert gas atmosphere July 22, 1986
A machine for packaging articles in continuous tubular material, which may be formed by rolling the marginal edges of a flat web around a succession of the product articles to bring the marginal edges into contact and then sealing them continuously to complete the tube, comprises a pair
4599276 Heat-sterilizable laminate films July 8, 1986
A heat-sterilizable laminate film especially useful for making disposible pouches for sterile injectable compositions comprises an ethylene-vinyl acetate copolymer layer and on either side of the said layer a layer of a propylene-ethylene copolymer which may contain an impact modifier. T
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