In 1608, Dutch eyeglass maker Hans Lipperhey filed the first patent for a working telescope. The patent was denied.
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| Number | Title | Issue Date |
| 8002922 | Power transmission belt and method of making a power transmission belt A method of forming a power transmission belt including the steps of: providing a first layer made from rubber and having first and second oppositely facing sides; providing a mold; pressing the first side of the first layer conformingly against a surface on the mol... | 08/23/2011 |
| 7144621 | Method of manufacturing laminated seamless belt and laminated seamless belt A laminated seamless belt having at least a base layer and an outer layer. The base layer contains a polyester thermoplastic elastomer as its main component. The base layer has a volume resistivity set to not less than 1.0×106(Ω·cm) nor more than 1.0×... | 12/05/2006 |
| 7128674 | Frictionally engaged driving belt The invention relates to a frictionally engaged driving belt having a base body (2) and a cover layer (1) that consists of rubber or a rubber-like synthetic material which is provided with a tractive support layer (3) that is embedded into the r... | 10/31/2006 |
| 7007990 | Reinforced impact beam with layered matrix An impact beam having a polymer matrix and a metal reinforcing structure, the metal reinforcing structure including metal cords that can be made from metal elements having a diameter of 100 μm or more. The polymer matrix can include a thermoplastic material and/or ... | 03/07/2006 |
| 6949211 | Means of manufacturing plural optimized cogged drive belts A multi-ribbed power transmission belt having longitudinal grooves and transverse grooves that form a plurality of cogs on the belt surface defined between adjacent transverse grooves is provided. The pitch lengths of the rows of cogs are randomized or sequenced ove... | 09/27/2005 |
| 6921447 | Dynamic pitch correction in press cured power transmission belts A method for manufacturing a cured, toothed belt is carried out upon a on a belt-making machine. The method includes incrementally molding sections of the belt with tooth spacing based on an estimated pitch circumference derived from a measured inside circumference,... | 07/26/2005 |
| 6800236 | Crawler molding method A molding method for a seamless crawler is provided in which the number of production steps is few, embedding of spiral reinforcement cords and a circumferentially uniform strength property are made possible, high-speed traveling can be accommodated, and a uniform, ... | 10/05/2004 |
| 6644818 | Retroreflective prismatic retro-reflectors without visually disturbing seams A method and apparatus for making retro-reflective articles are described which can be made without visually disturbing seam lines, In one embodiment molds having retro-reflective elements have serrated edges along boundary lines of retro-reflective eleme... | 11/11/2003 |
| 6497832 | Method for manufacturing a striated belt The present invention relates to a power transmission striated belt including an elastomeric matrix (21) and a lengthwise supporting structure consisting of polyamide 4.6 twisted strands (20). The supporting structure (21) is selected so that the stress-e... | 12/24/2002 |
| 6406577 | Method of making abrasive belt with an endless, seamless backing A coated abrasive backing consisting of an endless, seamless, loop is provided. The backing loop includes about 40-99% by weight of an organic polymeric binder, based upon the weight of the backing; and an effective amount of a fibrous reinforcing materia... | 06/18/2002 |
| 6406576 | Method of making coated abrasive belt with an endless, seamless backing A coated abrasive backing consisting of an endless, seamless, loop is provided. The backing loop includes about 40-99% by weight of an organic polymeric binder, based upon the weight of the backing; and an effective amount of a fibrous reinforcing materia... | 06/18/2002 |
| 6177042 | Method and apparatus for making integral rubber tractor tracks Method and apparatus for molding an endless tractor track from an uncured belt and a plurality of drive lugs wherein the lugs are pressed onto the inner periphery of the belt, the belt and lugs are positioned in a mold to be cured and molded together whil... | 01/23/2001 |
| 6106650 | Manufacturing of fibre reinforced composites A method for manufacturing an article of fibre reinforced resin material includes the preparation of a reinforcement preform which includes one or more roves of staple fibres with sufficiently low twist to enable the fibres to slide relative to each other... | 08/22/2000 |
| 6086811 | Molding system for rubber tractor tracks A system for molding an endless tractor track by wrapping uncured rubber, calendered cord and wire cable onto the rim of a building and curing drum, positioning the drum within a curing mold, withdrawing the drum from the mold, chilling the drum and then ... | 07/11/2000 |
| 6086809 | Method of forming a belt/belt sleeve and a belt/belt sleeve made using the method A method of forming a belt/belt sleeve having a length and teeth spaced lengthwise of the belt/belt sleeve. The method includes the steps of providing a cylindrical cloth having a sewn joint; providing a mold having an axis, a circumference, and a plurali... | 07/11/2000 |
| 6051178 | Method and apparatus for making an endless rubber tractor track Method and apparatus for molding an endless tractor track from an uncured belt and a plurality of drive lugs wherein the drive lugs are urged into cavities formed in the inner segments of a molding press, partially final formed and pressed onto the inner ... | 04/18/2000 |
| 5888330 | Method and apparatus for producing a power transmission belt A method of making a power transmission belt/belt sleeve, which method includes the step of providing a first mold assembly having a central axis and a circumference, providing a sheet material having first and second oppositely facing surfaces, placing t... | 03/30/1999 |
| 5837085 | Method of making a toothed belt with a reinforced fabric covering A method of making a toothed belt. A toothed belt is made by guiding a strip of fabric to pass through a thermosetting resin to soak it with thermosetting resin, then the soaked fabric is guided to pass through a pair of toothed rollers to form a series o... | 11/17/1998 |
| 5609706 | Method of preparation of a coated abrasive belt with an endless, seamless backing A coated abrasive backing consisting of an endless, seamless, loop is provided. The backing loop includes about 40-99% by weight of an organic polymeric binder, based upon the weight of the backing; and an effective amount of a fibrous reinforcing materia... | 03/11/1997 |
| 5573619 | Method of making a coated abrasive belt with an endless, seamless backing A coated abrasive backing consisting of an endless, seamless, loop is provided. The backing loop includes about 40-99% by weight of an organic polymeric binder, based upon the weight of the backing; and an effective amount of a fibrous reinforcing materia... | 11/12/1996 |
| 5536464 | Apparatus and method for curing endless rubber track The present invention provides novel apparatus and a novel method for manufacturing an endless rubber track for large vehicles such as tractors or earth-moving machines. A plurality of sprocket-engaging core bar inserts are disposed in the inner portion o... | 07/16/1996 |
| 5427728 | Method of making a plurality of toothed belt constructions A method of making a plurality of toothed belt constructions and a set of such belt constructions are provided, the method including the steps of disposing tubular sleeves of stretchable fabric material respectively onto a plurality of toothed mold member... | 06/27/1995 |
| 5242743 | Fiber reinforced rubber A rubber having fiber reinforcement embedded thereon. The reinforcement comprises a cylindrically braided cords of more than four and even numbered twisted yarns. Yarns are right twist oriented and left twist oriented and they are twisted in the reverse d... | 09/07/1993 |
| 5219505 | Method to make an endless, flat, flexible belt of pourable plastics A method and an apparatus for making an endless, flat, flexible belt of pourable plastics include a core, especially a multiple core, as tension bearer, for example in a conveyor belt of polyurethane. Spaced apart support filaments extending transversely ... | 06/15/1993 |
| 5192382 | Method of manufacturing low-edge V-belts The present invention relates to a method of manufacturing low-edge V-belts including the steps of: forming an unvulcanized belt annular body inside out by winding respective components constituting the elongated portion, tension-resistant portion, and co... | 03/09/1993 |
| 5176867 | Method of making a toothed belt construction with an endless preformed fabric sleeve A toothed belt construction, preformed fabric liner therefor and methods of making the same are provided, the preformed fabric liner being adapted to line the toothed surface of a toothed belt construction and having serially disposed tooth-shaped project... | 01/05/1993 |
| 5066344 | Process for producing an endless belt An endless belt comprising a belt main body prepared from a liquid castable elastomeric material, a reinforcing fabric providing over the surface of the main body, and a shock absorbing layer of elastomeric material formed between the main body and the fa... | 11/19/1991 |
| 4946731 | Construction for an extended nip press belt A belt for use on an extended nip press for dewatering a fibrous web is shown. The belt includes a base fabric having machine-direction and cross-machine direction yarns and takes the form of an endless loop. At least one of the machine-direction and cros... | 08/07/1990 |
| 4931118 | Method of manufacturing multiribbed belts A multiribbed power transmission belt and method of manufacturing the same, wherein an unvulcanized belt preform is provided with transversely extending staple fibers in the compression section thereof. The compression section is caused to be vulcanized w... | 06/05/1990 |
| 4908090 | Apparatus for pressure-forming and curing of polymer products Apparatus for the pressure-forming and curing of polymer products incorporates two moulds (1) and a forming device, the moulds (1) being sturdily linked to each other with provision for setting the separating distance as required and for revolving on a fu... | 03/13/1990 |
| 4589941 | Method of fabricating double-toothed belts A method of forming a double timing belt wherein a belt preform is firstly formed with teeth on one face thereof. The opposite face of the belt in which the tensile cord is embedded is provided with oppositely projecting teeth in accurate alignment with t... | 05/20/1986 |
| 4586973 | Method of making belt A belt construction and method of making the same are provided, the belt construction comprising a tensile member intermediate the opposed sides of the belt construction, a plurality of teeth defining one of the opposed sides of the belt construction and ... | 05/06/1986 |
| 4563323 | Method and apparatus for the manufacture of a continuous serrated belt An annular channel on the circumference of a rotatable moulding wheel is closed with a part-circular covering to form a mould cavity at the commencement of which mouldable material is introduced with an injection nozzle. For the production of reinforced t... | 01/07/1986 |
| 4548663 | Conveyor belt splicing A method for splicing belt ends of an endless belt, as in the field, wherein uniform tension is provided to the reinforcing members such as strands or cables in the spliced section. The respective spaced ends or sections have all belting material removed ... | 10/22/1985 |
| 4515743 | Method of producing a reinforced toothed belt having a fabric cover A method of producing a reinforced plastics toothed belt having a fabric cover on the toothed side of the belt. Formed between a molding wheel and a molding wheel cover is a mold cavity into which the liquid plastics material, the reinforcing wires, and t... | 05/07/1985 |
| 4510003 | Method of making an endless power transmission belt construction An endless power transmission belt construction having power transmitting contact faces and method of making the same are provided, the belt construction comprising an axial tensioning unit, a plurality of lateral stiffening units carried by the tensionin... | 04/09/1985 |
| 4510113 | Belt sleeve manufacturing method and apparatus A method and apparatus for forming belt sleeves having grooves provided in either or both of the inner and outer surfaces thereof. The manufacture includes the provision of a preform laminate on an inner mold and the forcible urging of a constrictable out... | 04/09/1985 |
| 4486375 | Method of manufacturing toothed belts A method of manufacturing a toothed belt including the steps of providing a cylindrical mold having a plurality of longitudinal circumferentially spaced grooves, providing a thin layer of settable material on the mold surface, preforming a fabric to defin... | 12/04/1984 |
| 4448621 | Long synchronous belt and method for making the same A long synchronous belt made primarily of elastomeric material is provided which comprises a plurality of narrow, toothed strips joined in side-by-side fashion, each strip having at least one longitudinally-extending reinforcement located therein. Also pr... | 05/15/1984 |
| 4445949 | Method of making a fiber-loaded polymeric sheet A method of making a fiber-loaded polymeric sheet and power transmission belts utilizing same are provided wherein the sheet comprises a substantially solid polymeric matrix having fibers embedded therein and wherein the fibers comprise between 40% and 70... | 05/01/1984 |