Did You Know...
...that one person who claimed to be the inventor of the television is Russian emigre Vladimir Zworykin? In 1929 David Sarnoff, founder of RCA, asked Zworykin what it would take to develop TV for commercial use. He said: a year and a half and $100,000. In reality, it took 20 years and $50 million! Before his death in 1982 at the age of 92, Zworykin said of his invention: "The technique is wonderful. It is beyond my expectations. But the programs! I would never let my children even come close to this thing."
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| Number | Title | Issue Date |
| 7311442 | Air valve for a fillable poly bag An air valve for a poly bag that permits the escape of air from the bag as it is filled by a filling tube. The air valve consists of a plurality of slitted openings in one top corner of the bag and a valve flap mounted in the poly bag near the slitted openings that ... | 12/25/2007 |
| 6783345 | In situ molded thermal barriers The invention provides methods, systems, and devices for installing barriers in openings or gaps in or between structures such as walls, ceilings, and floors. At least one barrier molding bag is positioned in the hole or gap, and a flowable firestop material that is... | 08/31/2004 |
| 6723408 | Resealable envelope A resealable envelope comprising a flexible plastic back sheet, a backing adhesive applied on a back surface of the flexible plastic back sheet to attach the envelope to a package, a flexible plastic front sheet attached to the back sheet at their respective side ed... | 04/20/2004 |
| 6595688 | Sealable valve bag and method for making a sealable valve bag The valve bag includes a bag body having a valve end portion, the valve end portion constructed to form a filling passage in which a valve sleeve is inserted. The valve sleeve has a first end extending into the interior of the valve bag and a second end e... | 07/22/2003 |
| 6471403 | Valve bag A method for closing a valved sack having one or more layers of flexible material. The valved sack has a filling opening which is closed after filling the valved sack. The filling opening is formed by opposite layers of material, which when closing the va... | 10/29/2002 |
| 6164823 | Valve bag and method for making a valve bag A valve bag has a sleeve that includes a butt seam formed by abutting opposed edges of a paper sheet and securing the abutting edges. A strip of tape may be used to secure the abutting edges. The interior surface of the sleeve and the tape are both constr... | 12/26/2000 |
| 6126316 | Automatic self-closing valve closure assembly for valve bags The present invention is a valve bag with a valve assembly that provides closure during and after the filling process, thus preventing unwanted spilling and sifting of the valve bag contents through the valve opening during transporting or moving the bag ... | 10/03/2000 |
| 6092930 | Self-closing sealable valve bag A valve bag is provided having a self-closing feature to preclude sifting losses after filling, but before the bag is fully sealed, while enabling the facilitated final secure closure of the bag.... | 07/25/2000 |
| 6074095 | Four member valve closure assembly for valve bags A valve assembly for a satchel end tubular bag comprising four members. Two members form an upper sub-assembly and two other members for a lower sub-assembly. The valve assembly is adhesively secured at a corner tuck of the satchel end within the paper pl... | 06/13/2000 |
| 5967664 | Sift proof valve bag A valved bag is provided, having first and second end portions, and at least one in-folded flap member and at least one outer flap member affixed to at least one of the first and second end portions. A cover member is positioned and affixed to the in-fold... | 10/19/1999 |
| 5806982 | Self-closing sealable valve bag A valve bag is provided having a self-closing feature to preclude sifting losses after filling, but before the bag is fully sealed, while enabling the facilitated final secure closure of the bag.... | 09/15/1998 |
| 5692546 | Method of loading a bulk cargo A method for loading a bulk cargo into a flexible expandable liner. The liner has a body defining an inlet opening and an interior for holding the cargo. An inlet chute is connected to the liner body and extends through the inlet opening. The method inclu... | 12/02/1997 |
| 5516210 | Self-closing sealable valve bag A valve bag is provided having a self-closing feature, to preclude sifting losses after filling, but before the bag is fully sealed, while enabling the facilitated final secure closure of the bag.... | 05/14/1996 |
| 5158370 | Bag valves A bag having a filling valve integral with and extending though an end closure section of the bag adapted to be sealed by electromagnetic field induction heating. Valves having a thermoplastic polymeric inner layer are provided with metal foil adjacent to... | 10/27/1992 |
| 5104235 | Packing container made from a flexible material in the form of a sack or bag A packaging container made of flexible material has bottom and head ends along with front and rear walls. The front and rear walls have lower side borders juxtaposed to the bottom end and which are joined together along juncture fold lines which are paral... | 04/14/1992 |
| 5098201 | Sealable valved bag A bag having a filling valve integral with and extending through an end closure section of the bag adapted to be sealed by electromagnetic field induction heating. Valves having a thermoplastic polymeric inner layer are provided with metal foil adjacent t... | 03/24/1992 |
| 4930904 | Cross-bottom or block-bottom valve sack A foldable bag material is formed into a bag having at least one end with a corner and having an end closure formed by the bag material which closes off the one end of the bag. A filter valve tube extends within the end closure at the one corner, the tube... | 06/05/1990 |
| 4759640 | Rose-bottom or block-bottom valve bag A bag of foldable material has an end closure closing off one end of the bag and a filling valve tube device extends into the end closure at a corner of the bag, the filling valve tube device has an inner end disposed within the interior of the bag and ha... | 07/26/1988 |
| 4685148 | Square ended valve bag Square ended valve bags are formed from a tube-like band and in a chain with the back wall and top end of each bag partially sealed together to provide bags between the seals. Patches are placed on the top end of the bag and the patches and top ends are p... | 08/04/1987 |
| 4637062 | Plastic bag assembly including a conduit member There is disclosed a bag assembly comprised of a tubularly-shaped bag preform formed of a plastic material defining a top closure portion and a bottom closure portion and provided with an adhesive layer peripherally-disposed about the tubularly-shaped bag... | 01/13/1987 |
| 4401140 | Filler valve for valve bag A valve bag adapted to have a filler nozzle inserted therein for filling the bag with bulk material is provided in its top portion with a filler valve which includes a tube of relatively stiff material extending inwardly from an opening in a wall of the b... | 08/30/1983 |
| 4391404 | Sleeve valve for flexible bags An improved sleeve valve for use in a flexible paper bag which is adapted to package granular products. The sleeve is mounted in the open mouth located in a corner of the flexible bag and adapted to receive the filler spout of a product-dispensing mechani... | 07/05/1983 |
| 4382538 | Valved lined container A valved lined container is disclosed. The container has an opening at one corner through which the liner valve protrudes. The liner valve is supported by an end flap of the container. The other corners of the container are reinforced. The liner may be fi... | 05/10/1983 |
| 4367620 | Valved bag sealing A vacuum heater head is provided for sealing the valve of a bag after the bag has been filled through the valve. The head has a generally planar surface with a plurality of spaced recesses opening therethrough, passages being provided in the head to open ... | 01/11/1983 |
| 4364510 | Filling valve for a bag or other container A leak-proof filling valve for a paper sack is formed by folding a composite sheet formed from Kraft paper 1 on top of which is laid relatively flexible polythene 2. The folded sheet is secured between end flaps 10A, 12 of a paper sack. The sack is charge... | 12/21/1982 |
| 4361268 | Sleeve construction for a bag having a filling opening A deflecting member construction is disclosed for a bag having an end closure which has a filling passageway at one end of the end closure through which a bulk material is conveyed into the bag. The deflecting member has an elongated section extending int... | 11/30/1982 |
| 4316574 | Sleeve valve for flexible bags A flexible paper bag suited for containing granular products includes an improved valve in a corner of one end thereof which is adapted to receive a filler spout of a product dispensing machine therein. The valve comprises a tubular plastic sleeve interpo... | 02/23/1982 |
| 4166482 | Lubricated valve bag and method of lubricating valve spout A valve bag with an opening in one corner adapted to receive a spout for filling the bag, the opening having an insert therein, which insert has a light coating of a lubricant on its inner surface, so that when the bag is slipped on the filling spout some... | 09/04/1979 |
| 4111354 | Valve bag A valve bag for bulk materials has a filler valve inserted in an end closure section and consisting of a tube of flexible material which passes through the end closure section and a wire spring attached to the tube and bearing against the end closure sect... | 09/05/1978 |
| 4095736 | Bag closure having valve sleeve A bag having an end closure through which the bag is filled after sealing of the closure. A valve sleeve is provided in the end closure through which a filling tube may be inserted for filling the bag. After completion of the filling operation, the valve ... | 06/20/1978 |
| 4071187 | Valve bag A bag of the type having a side and a closed end which adjoin at corner portions which are turned inwardly to form a valve opening. The bag is made of a thermoplastic material, and a flap of thermoplastic material is secured around the interior of the val... | 01/31/1978 |
| 4049191 | Block bottom valve bag A block bottom valve bag comprises an elongated bag tube having opposite ends. One end of the bag is folded to form a block bottom closure comprising first and second side flaps folded toward one another in overlapping relationship and adhered to one anot... | 09/20/1977 |
| 3990628 | Plastic bag with zig zag plies A plastic bag with zig zag plies provided with a tubular valve foil sealed on the one hand to an outwardly folded tubular foil part originally situated between two incisions along zig zag ply edges and on the other hand to an end seal of the tubular foil ... | 11/09/1976 |
| 3989182 | Vented bag A vented bag comprising a front wall, a back wall, and opposite end walls forming an enclosed container. Each of the end walls is comprised of first and second side flaps folded towards one another in an overlapping relationship and being adhered to one a... | 11/02/1976 |
| 3945562 | Cross-bottom bag and method of making same In a composite bag comprising an outer bag and an inner bag which is secured thereto by adhesive, the outer bag is provided with a cross-bottom folded closure at least at one end where no filling valve is provided. Adjacent said one end of the outer bag, ... | 03/23/1976 |
