| Patents for B24B 21 - Machines or devices using grinding or polishing belts; Accessories therefor (4,476) |
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| 11/23/1991 | CA2083050A1 Woodworking machine, such as a traversing sanding machine |
| 11/19/1991 | US5065548 Surface treating tape cartridge and surface treating machine |
| 11/19/1991 | US5065547 Surface processing machine for hard disks and the like |
| 10/22/1991 | US5058325 Machine for the abrasive machining of cylindrical journals on components, in particular for machining journals and crank pins on crankshafts using abrasive material |
| 10/09/1991 | EP0449920A1 Grinding apparatus |
| 09/04/1991 | EP0444242A1 Rail grinding machine |
| 08/22/1991 | WO1991012111A1 Computer-controlled grinding machine for producing objects with complex shapes |
| 08/21/1991 | EP0442852A2 Device for deburring and beveling flat pieces, with a variable beveling angle |
| 08/06/1991 | US5036626 Belt type |
| 07/24/1991 | CN2081331U Dual-purpose changing abrasive belt finishing machine |
| 07/17/1991 | EP0437329A2 Suture needle and method of and apparatus for grinding material for suture needle |
| 07/10/1991 | EP0435897A1 A method for grinding steel. |
| 07/02/1991 | US5028242 Lapping member and lapping tape |
| 06/26/1991 | EP0434533A1 Machine for the superfinishing of shafts, particularly camshafts |
| 06/19/1991 | EP0432908A2 Cylinder hone |
| 06/05/1991 | EP0430207A1 Contact roller for belt grinding machine |
| 05/28/1991 | US5018311 Magnetic disk burnishing method and apparatus |
| 05/21/1991 | US5016400 Pressure bar for a belt grinding machine |
| 05/17/1991 | CA2027925A1 Cylinder hone |
| 05/08/1991 | EP0426626A2 Improvement to a wide-belt sander machine |
| 05/08/1991 | EP0426625A1 Design for a cross-beam to support presser plates used on woodworking machinery |
| 05/08/1991 | DE4034146A1 Belt grinder for cam surfaces - has accurate line contact surface generation by substituting roller supported abrasive belt for follower roller |
| 05/08/1991 | CN1012564B Method and apparatus for combination roll polishing |
| 05/07/1991 | US5012618 Magnetic disc surface treatment and apparatus |
| 04/23/1991 | CA1283295C Belt tracking adjustment means for belt type abrading machine |
| 04/16/1991 | US5007205 Tensioner release and mechanism for belt sanders |
| 04/11/1991 | DE3933697A1 Multi-head wood sanding machine - has abrasive belts with sanding direction deviating from feed and cross-feed directions of work |
| 04/04/1991 | WO1991004134A1 Automated rigid-disk finishing system providing in-line process control |
| 04/04/1991 | WO1991004133A1 Apparatus for texturing rigid magnetic recording disks |
| 03/19/1991 | US4999953 Superfinishing machine using lapping film |
| 02/28/1991 | DE4000251A1 Grinding surface of wire or bar - involves rotating disc with groups of rollers to guide abrasive belt |
| 02/27/1991 | EP0414347A1 Belt grinding machine for analytical specimens |
| 02/26/1991 | CA1280608C Abrasive belt grinding machine |
| 02/20/1991 | EP0413165A2 Device for deburring workpieces made out of plastics |
| 02/19/1991 | US4993191 Roller cam microfinishing tooling |
| 02/19/1991 | US4993190 Polishing apparatus |
| 02/12/1991 | US4991361 Cylinder hone |
| 01/29/1991 | US4987701 Endless belt valve grinder |
| 01/24/1991 | DE4003409A1 Abrasive belt grinding machine - has abrasive belts guided along variable path according to cam contour desired by shoes engaging belts |
| 01/10/1991 | WO1991000163A1 Hand sander |
| 01/09/1991 | EP0406989A1 Profile-grinding unit |
| 01/08/1991 | US4983421 Method for producing magnetic recording media |
| 01/03/1991 | DE3921003A1 Handbandschleifmaschine Hand belt sander |
| 01/02/1991 | CA1278498C Band sawing machine |
| 12/25/1990 | US4979335 Apparatus for precision machining crank pins of crankshafts |
| 12/18/1990 | US4977708 Portable handheld tool machine having a tensioning device for a belt drive |
| 12/06/1990 | DE3925586C1 Endless belt grinding machine - prepares tensile test-pieces using flat table with rollers at either end |
| 12/05/1990 | EP0400901A2 Belt grinding assembly |
| 11/07/1990 | EP0396067A2 Profile grinding device |
| 11/06/1990 | US4967513 Belt sanding machine |
| 10/28/1990 | CA2009590A1 Roller cam microfinishing tooling |
| 10/23/1990 | US4964242 Apparatus for texturing rigid-disks used in digital magnetic recording systems |
| 10/23/1990 | US4964241 Blade sharpener |
| 10/18/1990 | DE4011748A1 Vorrichtung zum aufrauhen der oberflaeche eines kunststoffilms Apparatus for roughening the surface of a plastic film |
| 10/16/1990 | US4963164 Machine for surface treatment with means for positioning processing tools |
| 10/03/1990 | EP0389914A1 Pressure beam for belt sander |
| 09/13/1990 | DE4006662A1 Machine for grinding large flat workpieces - has workpiece transport belt which can be inclined to horizontal |
| 09/04/1990 | US4954140 Solid polymer particle and abrasive |
| 08/29/1990 | EP0384093A1 Plane grinder with stationary table |
| 08/28/1990 | US4951419 Flexible manufacturing system |
| 08/22/1990 | CN1044780A Superfinishing apparatus using lapping film |
| 08/16/1990 | EP0382336A2 Size control shoe for microfinishing machine |
| 08/07/1990 | US4945683 Abrasive belt grinding machine |
| 07/17/1990 | US4941294 Grinding machine for belt materials |
| 07/12/1990 | WO1990007401A1 Guide for use in a grinding device |
| 07/10/1990 | US4939870 Vertical/horizontal double-way grinding type abrasive belt grinder |
| 07/05/1990 | DE3844359A1 Belt grinder |
| 07/05/1990 | DE3844358A1 Belt grinder |
| 06/21/1990 | DE3841916A1 Method for controlling the pressure force of a tool, and machine tool for carrying out this method |
| 06/19/1990 | US4934882 Apparatus for monitoring the angular position of a workpiece |
| 06/13/1990 | DE3840886A1 Press-on device for grinding and polishing belts |
| 06/05/1990 | US4930259 Magnetic disk substrate polishing assembly |
| 05/30/1990 | CN1042618A Polishing method for magnetic head, and the polishing machine |
| 05/22/1990 | US4926602 Edge sander having adjustable support table or tables |
| 05/15/1990 | US4924633 Apparatus for use with stationary belt sander station |
| 05/10/1990 | DE3936931A1 Video tape magnetic head - using polishing tape pressed against guide cylinders by guides with internal arched surfaces |
| 05/08/1990 | US4922675 Abrasive tape |
| 05/02/1990 | EP0366506A1 Device for abrasive machining of cylindrical bearing surfaces of workpieces, in particular for belt grinding of crankshaft journals and pins |
| 05/01/1990 | CA1268308A1 Method and apparatus for automatically buffing a golf ball |
| 04/26/1990 | DE3904704C1 Device for the mechanised, independent fitting of a new endless grinding belt onto a freely movable belt-grinding machine |
| 03/22/1990 | WO1990002631A1 A method and apparatus for grinding metal and metal-alloy stock |
| 03/22/1990 | DE3926748A1 Toothed belt-grinding machine |
| 03/21/1990 | EP0359304A2 Method and apparatus for the copy grinding of cylindrical or spherical surfaces |
| 03/14/1990 | CN2054394U Sheathing board-repairing machine |
| 02/28/1990 | CN1039989A Surface treatment and apparatus for grinding locomotive engine commutator using abrasive band |
| 02/08/1990 | DE3826706A1 Grinding method for plate-like workpieces |
| 02/06/1990 | CA1265343A1 Microfinishing apparatus and method |
| 01/30/1990 | US4896462 Mechanism for belt sanders |
| 01/18/1990 | DE3823835A1 Machining apparatus |
| 01/10/1990 | EP0349653A1 Superfinishing machine with lapping film |
| 12/28/1989 | DE3821559A1 Floor-working machine |
| 12/06/1989 | CN2048808U Attached grinding apparatus of lathe |
| 11/14/1989 | US4879846 Ingot knock out and grind machine |
| 11/02/1989 | DE3844360C1 Portable belt-grinding machine |
| 10/25/1989 | EP0338224A2 Device for finishing pins of crankshafts |
| 10/19/1989 | DE3811904A1 Arrangement for working the surface of wires by means of grinding |
| 10/04/1989 | EP0335440A1 Device for grinding a bearing journal of the crankshaft of a combustion engine, in particular a diesel engine |
| 09/12/1989 | US4864775 Cross-belt sanding machine with oscillating platen means |
| 08/24/1989 | DE3804295A1 Method for making a wooden door with hard particle-board cladding panels arranged on the outside thereof |
| 08/23/1989 | EP0329300A2 Magnetic disk substrate polishing assembly |