Famous Patents
3M employee and church chorister Art Fry needed something to temporarily mark pages in his hymnal. He was in luck because his colleague, Spencer Silver, accidentally developed a glue that was too weak for other purposes. After initially discouraging consumer response, Post-it Notes became a hit in 1979.
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| Number | Title | Issue Date |
| 7909681 | Chainsaw setting machine A chainsaw sharpener mounted on and forward of the electric motor of a sharpener body (2) via a mounting portion (9) having a guide body (8) with an upper plate face (80) and wall faces (81a to 81e) which have ... | 03/22/2011 |
| 7431637 | Saw-setting machine for saw chain It is to provide a saw chain sharpener such that while a saw chain is clamped at both ends by a holding plate, which is supported forward of a handy type electric motor, so as to stabilize its sharpening posture, a grinding tool such as a round rod-shaped grinding t... | 10/07/2008 |
| 7401536 | Method or jointing the cutting edge of at least one cutting blade of a rotating tool In a method of jointing a cutting edge of at least one cutting blade of a rotating tool, wherein between the tool and at least one straight jointing stone a radial advancing movement is carried out and wherein the jointing stone has an active jointing area that is l... | 07/22/2008 |
| 7390243 | Sharpener for blades of food slicers A sharpener to sharpen the edge of a food slicer blade includes a non-planar abrasive surfaced rotatable disk mounted on a supporting structure. The supporting structure includes one or more surfaces designed to align with at least one of a push bar, thickness contr... | 06/24/2008 |
| 7320635 | Device for sharpening chain saw teeth A device for sharpening chain saw teeth, in particular a chain saw which is portable and applicable in the field, and where the chain is not to be taken off the chain saw blade when sharpened enables swinging of a grinding wheel (16) transversally to each too... | 01/22/2008 |
| 7238090 | Polishing apparatus having a trough Methods and apparatus for chemical mechanical polishing are described. In one embodiment, an apparatus includes a table top and a transfer station and multiple polishing stations are mounted on the table top. The apparatus further includes multiple washing stations,... | 07/03/2007 |
| 7220169 | Sharpening apparatus A sharpening apparatus (16) for a blade-like cutting implement. The sharpening apparatus has an elongate body (18) and a cutting edge extending widthwise across one end of the body (11) at a predetermined angle relative to the longitudinal axis ... | 05/22/2007 |
| 7146788 | Chopper arrangement for a forage harvester A forage harvester chopper arrangement is located within a housing provided with an access door mounted for pivoting vertically between a chopping position, wherein access to the chopping arrangement is prevented, and a grinding position, permitting access to the ch... | 12/12/2006 |
| 7125325 | Portable sharpening system for a dual-knife cutting machine A grinding apparatus (36) for a paper cutting mechanism (10) is shown and includes a coupler (38), for mounting on an upper rail (14) of the cutting mechanism (10), a motor-driven grinder (40), and an adjustable support (... | 10/24/2006 |
| 6910959 | Fixture for a grinding or polishing wheel A fixture (1) for guidance of a tool having a cutting edge with respect to the periphery of a rotating grinding or polishing wheel (2), comprising a frame structure that runs along the periphery (6) of the wheel and has a guide formed as a slot ... | 06/28/2005 |
| 6908369 | Apparatus for and method of smoothing substrate surface An apparatus for smoothing a surface of a rotatably supported substrate includes a base plate, a block having an extending arm structure and being attached to the base plate so as to be movable along the surface of the base plate, a roller attached to a tip portion ... | 06/21/2005 |
| 6814652 | Method to sharpen the cutting knife of a knife ring chipper A method for sharpening the cutting knives of a knife ring chipper, which includes a knife ring and a number of knife units, the units in turn containing knives and holding plates. The knife ring is removed from the knife ring chipper, the knife units of the knife r... | 11/09/2004 |
| 6644154 | Apparatus for transverse cutting The cutting blade of a continuous motion saw is mounted on a skew arm which rotates about an axis which is skewed relative to the path along which the product to be cut is advanced. The blade rotates about an axis which is parallel to the path. The blade ... | 11/11/2003 |
| 6503135 | Grinding device A chopper drum includes a plurality of knives distributed along its width and about its circumference. A grinding device is provided for automatically sharpening the knives, with a grinding stone of the grinding device having its movement automatically co... | 01/07/2003 |
| 6475063 | Grinding device An automatic grinding device for sharpening the knives of a forage harvester chopper drum includes a controller including a counter for counting the number of times the grindstone is adjusted toward the chopper drum during sharpening operation. The contro... | 11/05/2002 |
| 6261161 | Sharpener assembly for a food slicer and related method A sharpener assembly for a food slicer includes a rotatable frame with a sharpening member and a truing member operatively connected for rotation with the frame. The frame is mounted on a food slicer to place the sharpening member and truing member on opp... | 07/17/2001 |
| 6257967 | Sharpener for veneer knife A sharpening tool for a veneer knife has a primary stone and a secondary stone driven by a power head. The secondary stone is inclined at an angle to the primary stone corresponding to the angle of the defined faces of the veneer knife cutting edge. Outri... | 07/10/2001 |
| 6241595 | Edger blade sharpener This invention is a sharpening device for lawn edger blades. The device is specifically designed for attachment to the machine and in use for when the machine is in operation. The reason for this is to keep the cutting edge of the blade continually sharp.... | 06/05/2001 |
| 6083088 | Implement working adapter An implement working adapter has a casing within which is a pulley-drive system for transferring drive from a powered grinding tool, with which the adapter is engaged, in use, to a pair of first and second grinding wheels within the casing, drive being tr... | 07/04/2000 |
| 5964648 | Chipper knife grinding method and apparatus A method and apparatus for sharpening the knives of a chipper, with the knives remaining in a knife basket during sharpening, and the knife basket being removed from the chipper and placed in a knife basket carrier in which it is rotatably mounted. The kn... | 10/12/1999 |
| 5941148 | Automatic slitter blade sharpener A device for automatically sharpening the circular cutting edge of a disk-like blade while it is rotatably mounted in a blade cartridge is disclosed. The sharpener includes a coupling assembly adapted to matingly retain the cartridge in the same manner th... | 08/24/1999 |
| 5924914 | Rotary cutter head knife jointer A rotary cutter head knife jointer is disclosed, in which a rigid base is adapted for mounting in a fixed position adjacent a rotary cutter head. The jointer includes a first carriage and a first guide that mounts the first carriage to the rigid base for ... | 07/20/1999 |
| 5868124 | Quick set radius dresser A radius dresser is provided including a base removably secured to a recipient surface. Also included is a cutting tip holder rotatable and radially slidable with respect to the base. The holder is selectively fixed with respect to the base. The holder ha... | 02/09/1999 |
| 5853318 | Roll surface grinder A roll surface grinder includes a frame mounted on a carriage assembly for traversing movement between opposite sides of the frame in a direction parallel to the axis of the roll subject to grinding. The carriage assembly includes a linear drive system fo... | 12/29/1998 |
| 5755825 | Sharpener for slitting blade A sharpening device for use with a continuous flexible band cutting blade. The sharpening device includes a pair of rotating abrasive wheels positioned on opposite sides of the cutting blade. The rotating wheels are mounted to a pivot plate on either side... | 05/26/1998 |
| 5727991 | Method and apparatus for in situ blade sharpening An apparatus and method for sharpening machine tool cutter blades in situ is disclosed. A connector adjustably connects a powered sharpening device to the apparatus. Further adjustment of the apparatus relative to the blades is provided by a body member m... | 03/17/1998 |
| 5725415 | Grinding machine and method of sharpening grass mower bedknives A portable grinding machine for grinding the bottom blade or bedknife of grass mowers. The grinding machine includes a rotary grinding wheel assembly arranged for linear motion, where the wheel assembly can adjust along the blade or bedknife and grind the... | 03/10/1998 |
| 5216841 | Sharpening device for the blades of a cross-cutting roller A sharpening device for the blade of a cross-cutting roller (1) is disclosed in which the cross-cutting roller (1) includes at least one blade plate (4) which is located in the angle formed by the two machined surfaces (2,3) of the cross-cutting roller in... | 06/08/1993 |
| 5172521 | Sharpening apparatus for forage harvester knives A sharpening apparatus is disclosed for a plurality of knives disposed in a cutterhead generating a cylindrical periphery when rotating. The apparatus comprises a grinding stone; a carriage for carrying the grinding stone in a grinding mode across the cut... | 12/22/1992 |
| 5159784 | Portable apparatus for sharpening blades A portable blade sharpening apparatus is disclosed which can be used to sharpen blades while they remain attached to their machines. The blade sharpening apparatus is powered by an electric motor and includes a circular grinding stone which is angled on o... | 11/03/1992 |
| 4987704 | Plunge jointer for planer knives A base is arranged to be secured to the support frame of a planer and supports a slide for movement toward and away from the planar knife head. The slide supports a grinding stone, and a lever connected between the base and the slide is arranged to move t... | 01/29/1991 |
| 4934108 | Veneer lathe knife honing device A veneer lathe knife and clipper knife honing device including a carriage member resting substantially on a lathe knife cutting edge that is itself upturned to receive the device. A plurality of guiding members and honing members are deployed on a compoun... | 06/19/1990 |
| 4829721 | Honing apparatus for bun slicing machines An apparatus for honing in place the endless blades of a band-type slicer for buns and similar bakery goods. The honing apparatus has a pair of independently adjustable hones mounted on a common actuator so that the hones will simultaneously engage both s... | 05/16/1989 |
| 4817480 | Knife sharpener A knife sharpener includes an abrasive cylinder and a rectangular block for sharpening the opposed portions of a knife edge. The cylinder and block are urged together to form a sharpening notch in which the knife edge is received. The knife sharpener is p... | 04/04/1989 |
| 4739588 | Method and apparatus for jointing rotatable cutter heads A jointing method and apparatus is described for jointing rotating blades on surfacing machines such as wood planers. The apparatus includes a pair of rods secured to the surfacer framework. An actuator mechanism is slidably mounted to the rods by a pair ... | 04/26/1988 |
| 4699118 | Apparatus for dressing cutting edge A dressing apparatus comprises a head movably mounted on a tip portion of a body, the head having a tip having formed therein a cut-out which opens in the direction of the movement of the head and into which one of outer and inner peripheral cutting edges... | 10/13/1987 |
| 4669166 | Electric lathe A novel retrofit process for converting the hydraulic lathe of an existing pulp-grinding machine into the new electric one is described. This process includes utilization of the pre-existing hydraulic cylinder as a supporting housing and shield for a majo... | 06/02/1987 |
| 4592171 | Paper drill bit sharpener A sharpening head with a conical stone or burr is spring biased for application to the end of a spinning paper drill bit brought down on the apex of the cone. As the drill depresses the head, a pin extends through the apex of the cone to push any paper sc... | 06/03/1986 |
| 4564991 | Tool for holding a blade for installation and removal thereof Disclosed is a tool for holding a lawnmower blade for installation and removal thereof. The tool comprises an elongate lever having a handle at one end, a blade engaging section about the other end, and a channel therebetween for accommodating the housing... | 01/21/1986 |
| 4393627 | Reversing screw/high-low speed level wind screw Sharpening mechanism for moving at a variable speed along the length of the sharp edge of a reciprocating knife used in cloth cutting machines is disclosed. The apparatus includes a driven grinding apparatus (26) such as is known in the art for contacting... | 07/19/1983 |
