Did You Know...
...that while attempting to develop a super strong glue, 3M employee Spencer Silver accidentally developed a glue that was so weak it would barely hold two pieces of paper together? However, his colleague Art Fry needed the glue. Fry sang with his church choir and marked the pages of his hymnal with small scraps of paper that often fell out. He used Silver's glue to hold the papers in place. Today we call this invention Post-it Notes.
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| Number | Title | Issue Date |
| 8113457 | Filament winding apparatus A filament winding apparatus reduces fluctuations in a winding operation by bringing a plurality of guide portions that guide fiber bundles to a liner close to the liner in a winding unit. Each of the guide portions is a tubular member having a guide hole penetrated... | 02/14/2012 |
| 7374127 | Systems and methods for making pipe liners An apparatus for wrapping material onto and around a pipe, the apparatus including a shaft, the shaft rotatable by a driving apparatus, a payout core containing material to be wrapped onto a pipe, the payout core releasably mounted on the shaft, a deflection arm ass... | 05/20/2008 |
| 7174920 | Method for repairing pipes The invention concerns a method for repairing a pressurized fluid supply pipeline (1) comprising a series of buried prestressed concrete pipe segments (2, 3, 4) which consists in: providing excavations in the trench, beneath suitably set portions (6... | 02/13/2007 |
| 7131238 | Method of testing seismic braces Braces for bracing objects in structures against forces due to earthquakes are tested by subjecting components of the braces for attaching the braces to the object or structure to cyclic loading of approximately 15 cycles. The cyclic forces are applied to different ... | 11/07/2006 |
| 4633568 | Method of manufacturing reinforced concrete pipe having an evenly distributed steel wire reinforcement A plain concrete pipe having an evenly distributed steel wire reinforcement is disclosed, said pipe being suitable for water piping and the like; this pipe being reinforced with a reinforcement constituted by thin wires evenly distributed and arranged in ... | 01/06/1987 |
| 4561306 | Instrumentation support ring for high-power rotary machine rotor and method for attaching same to rotor shaft A ring designed to support instrumentation modules on the rotor of a rotary machine and to withstand centrifugal accelerations significantly in excess of 500 g comprises two half-rings made of zicral (AZ5GU) alloy clamped to the rotor shaft. In order for ... | 12/31/1985 |
| 4541887 | Apparatus for longitudinally reinforcing continuously generated plastic pipe Method and apparatus for longitudinally reinforcing continuously generated, resin-impregnated fiber pipe includes deposition longitudinal reinforcing fiber elements directly onto the surface of the pipe into the nip formed between the surface of the pipe ... | 09/17/1985 |
| 4166000 | Apparatus for winding helical reinforcement into a polymeric tube Apparatus for winding a helical reinforcement into a polymeric tube comprising a mandrel on which the tube is assembled, a gauge mandrel portion at one end to feed reinforcement material a driven guide eye to give the required pitch to the winding and a c... | 08/28/1979 |
| 4162771 | Rod tensioner Apparatus for applying tension to a wire rod while wrapping the rod on a pipe for prestressing the pipe. The tension device includes a frame movable lengthwise of the pipe, the frame having a shaft parallel to the pipe on which is rotatably mounted a bull... | 07/31/1979 |
| 4058278 | Apparatus for winding plural strips under tension Apparatus for winding at least one strip of an elongate product, such as a wire or ribbon, on to a cylindrical body from a spool of the product comprising means for producing relative rotation of the spool around the cylindrical body, a main drive unit fo... | 11/15/1977 |
| 3964522 | Bevel pipe winder In the manufacture of prestressed concrete pipe, wire is wound under tension around the concrete body of the pipe and secured thereto. In accomplishing this the concrete pipe is mounted on a turntable for rotaton about the longitudinal axis of the pipe an... | 06/22/1976 |
| 3964521 | Bevel pipe winding method and product In the manufacture of prestressed concrete pipe, wire is wound under tension around the concrete body of the pipe and secured thereto. In accomplishing this the concrete pipe is mounted on a turntable for rotation about the longitudinal axis of the pipe a... | 06/22/1976 |
