Quotables
"It is my heart-warmed and world-embracing Christmas hope and aspiration that all of us, the high, the low, the rich, the poor, the admired, the despised, the loved, the hated, the civilized, the savage (every man and brother of us all throughout the whole earth), may eventually be gathered together in a heaven of everlasting rest and peace and bliss, except the inventor of the telephone. "
Mark Twain ; Christmas greetings, 1890
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| Number | Title | Issue Date |
| 7097394 | Circuit board production method and circuit board production data In the process of forming a through-hole or blind-hole at desired positions of a the substrate material, the present invention sets a drilling target position for each hole and a plurality of auxiliary drilling positions at a periphery of the drilling target positio... | 08/29/2006 |
| 5888036 | Drill bit and step feeding method An improved drill bit for high speed, small diameter drilling of printed circuit boards uses flute/land ratio tapering in combination with the appropriate web thickness and point, cutting or flute angles to obtain high quality, accurately positioned holes... | 03/30/1999 |
| 5584617 | Single flute drill for drilling holes in printed circuit boards and method of drilling holes in a printed circuit board A drill bit for forming holes in a printed circuit board. The drill bit includes a first end including a tip for contacting the material of the circuit board. A second end of the drill bit is attached to apparatus for rotating the drill bit. A cutting edg... | 12/17/1996 |
| 5377404 | Method for fabricating a multi-layer printed circuit board A method for fabricating at least one via or hole in a multi-layer printed circuit board comprises separately drilling the board layers, stacking and laminating the drilled board layers utilizing conformal mapping digital imaging in a computer, and then f... | 01/03/1995 |
| 5193949 | Arrangement for driving a rotary tool An arrangement for driving a rotary tool is provided in which the tool shank is engaged and frictionally driven by the engagement of three or more drive rollers. Axial movement of the tool is accomplished by tilting the axes of the rollers as permitted by... | 03/16/1993 |
| 5184926 | Root-strength drill bit and method of making An improved drill bit having a shank of larger diameter than the body of the drill has an intermediate section rearward of the point section of the drill of smaller diameter than the point, and a longitudinally elongated, enlarged diameter root section jo... | 02/09/1993 |
| 5141368 | Automated side-drilled device and method for catheters A device and method are provided for side-drilling of catheters. The method comprises storing side-drilling hole patterns, selecting a side-drilling hole pattern, positioning the catheter at successive locations defined by the pattern, and drilling holes ... | 08/25/1992 |
| 5023422 | Method of and apparatus for forming a slot in a workpiece A machine tool produces a tapered slot by moving a tool laterally of the workpiece as well as directly into it. The lateral movement is shortened at the end of each half reciprocation, so as to form the taper. The shortened stroke is achieved by use of el... | 06/11/1991 |
| 4954200 | Method of making drill back-up material for small bore drilling of circuit boards Disclosed is an improved back-up sheet for backing a workpiece during a small bore drilling process. The sheet also possesses electrical properties making it an ideal candidate as a laminate (reinforcing layer or bonding sheet) in the construction of mult... | 09/04/1990 |
| 4913931 | Method and solution for the prevention of smear in the manufacture of printed circuit boards A solution and a method of using it for preventing smear in the manufacture of printed circuit boards includes monoethanolamine combined with a fatty acid for neutralizing the active amine except in the presence of relatively high heat, and a surface tens... | 04/03/1990 |
| 4725171 | Drill for aramid composites A rotary carbide drill for drilling clean holes in aramid fiber composites is made from a cylindrical rod having a planar elliptical end surface. The drill has a longitudinally extending arcuate flute that becomes shallower as it progresses away from the ... | 02/16/1988 |
| 4722644 | Multi-lip drill A multi-lip drill is proposed in which an additional auxiliary swarf flute is arranged in the core region of one or more principal swarf flutes in order to enlarge the swarf space.... | 02/02/1988 |
| 4697964 | Boring machine This invention is directed to a boring machine provided with a spindle supported rotatably in a spindle housing, a driving means for rotating the spindle, and a spindle feed mechanism supporting the spindle housing so that the spindle housing can be moved... | 10/06/1987 |
| 4536108 | Flexible microdrill The flute terminus or carry out of a microdrill is located spaced from cross-sectional changes of the drill and away from such areas of stress concentration and permits a slight flexing of the drill to compensate for standard production environment in eff... | 08/20/1985 |
| 4402636 | Convertible machining center A machining center convertible between micro and macro machining operations with elimination of reactive spring back infeed pressures in the macro machining mode.... | 09/06/1983 |
| 4231692 | Drill comprised of hard metal for drilling contact holes in circuit boards and the like A hard metal drill is disclosed for drilling contact holes in multi-legend printed circuit boards formed of synthetic resin. The drill has a diameter of not more than 1.5 mm. and has main and secondary cutting edges and spiral-shaped flutes lying opposite... | 11/04/1980 |
| 4190386 | Method of producing holes free of accretions in circuit boards made of plastic A method is disclosed for producing accretion-free holes with a diameter of less than 1.5 mm in circuit boards made of plastic. A hard metal drill is employed having a cylindrical chucking shank and a fluted twist section. A central axis of the twist sect... | 02/26/1980 |
| 4135847 | Composite drill for drilling circuit boards This invention provides a drill, drilling apparatus, and methods for their use, in which a plastic shank of uniform external diameter is molded onto one end of an insert made of hard drill material. The end of the insert which is encompassed by plastic ha... | 01/23/1979 |
| 4128971 | Abrasive drill An abrasive drill of small diameter is provided with a cored portion that is eccentric, i.e., lacking a substantial concentric portion, relative to the longitudinal axis of the drill. The core, regardless of shape, is located so that during drill rotation... | 12/12/1978 |
| 3945807 | Metal tool A tool such as a drill, etc. made of a hard metal, e.g., a cemented carbide, having applied thereto a coating film of a noble metal such as gold, silver, platinum, etc. by means of an ion-plating treatment.... | 03/23/1976 |
