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 |
| 8042681 | Drive roller controller for an accumulating conveyor system A drive roller controller for accumulating conveyor system has a casing and a circuit board. The casing has a front face, two opposite sides and multiple openings respectively defined on opposite sides. The circuit board is mounted inside the casing and has at least... | 10/25/2011 |
| 7243781 | Conveyor loading zone system and method A conveyor system that includes a zoned conveyor surface and a loading sensor. The loading sensor is configured to detect placement of a load into the zone. A loading timer is activated by loading detection by the sensor and while activated, a controller system halt... | 07/17/2007 |
| 7140827 | Transporting apparatus It is an object of the invention to provide an apparatus for transporting a transported object in a transporting direction as the transported object is supported by air, the apparatus having a plurality of transporting units. A specific transporting unit of the plur... | 11/28/2006 |
| 7104395 | Control and power distribution system for a conveyor A conveyor conveys objects. The conveyor includes a plurality of sections, a first control panel, and a second control panel. The plurality of sections define the structure of the conveyor. Each of the plurality of sections has components for controlling the mechani... | 09/12/2006 |
| 7035714 | Integrated conveyor bed A conveyor system, and method of controlling the conveyor system, includes providing a conveying surface, at least one motor propelling the conveying surface and a plurality of lower-level controllers. At least one of the lower-level controllers adapted to control t... | 04/25/2006 |
| 6994195 | Clutch release mechanism A clutch mechanism connects a rotating shaft to an outer clutch member having a clutch keyway. The clutch mechanism permits the shaft to rotate in a normal direction and prevents the shaft from rotating in a reverse direction when the outer clutch member is rotation... | 02/07/2006 |
| 6996454 | Method and control system for controlling a conveyor system and a plant for baling paper pulp Methods are disclosed for controlling conveyor systems including providing status information for each of a plurality of conveyors, providing control information for each of the conveyors based solely upon the status information from that conveyor and from adjacent ... | 02/07/2006 |
| 6959804 | Conveyor assembly The conveyor apparatus disclosed herein is generally formed of a first rail and a second rail, each rail having a plurality of rollers. A portion of the rollers are desirably drive rollers, receiving power from an integral motor assembly. The motor generally compris... | 11/01/2005 |
| 6883660 | Conveyor bed emergency stop A conveyor system includes a conveyor frame, at least one motor at the frame and a control circuit at the frame. The motor is configured to cause articles placed in at least one location on the conveyor system to be transported when the motor is energized. A first p... | 04/26/2005 |
| 6827202 | Methods and apparatus for controlling conveyor zones One aspect of the present invention relates to a module for controlling two or more zones of an accumulating conveyor system. In one embodiment, the single module includes outputs to provide independent actuation signals to cause movement of two zones of the conveyo... | 12/07/2004 |
| 6305446 | Cutting machine A cutting machine comprises first (10) and second (12) work piece support means, said means including opposed surfaces operable to grip a work piece and move it in a controlled manner in a first dimension, and first (14) and second (16) cutting tools disp... | 10/23/2001 |
| 6193054 | Modular accumulator conveyor system A conveyor system especially suitable for transfer and spacing of articles in a smooth distortion-free manner and controlled acceleration/deceleration is provided. An endless transfer belt is driven by an endless drive belt selectively engaging the lower ... | 02/27/2001 |
| 6035999 | Zoned transport conveyor with automatic zone start-up and shut-down A zoned transport conveyor includes a drive roller and a series of driven rollers for each zone. A motor is interconnected with the drive roller for imparting rotation to the drive roller, which in turn is drivingly engaged with the driven rollers such as... | 03/14/2000 |
| 6021888 | Conveyer system and its control method A conveyer system including a plurality of conveyer units connected to each other in series. Each conveyer unit includes a plurality of rollers for conveying articles, a plurality of drive units for causing the rollers to be driven and brought to a halt, ... | 02/08/2000 |
| 5904239 | Roller conveyor system A roller conveyor has drive rollers individually connected to a stepping motor and idler rollers arranged longitudinally in two rows. The conveyor is divided longitudinally into a plurality of sections, each section being provided with a sensor and one of... | 05/18/1999 |
| 5862907 | Control system and module for an accumulation conveyor An accumulating conveyor is divided into a plurality of accumulating zones from an infeed end to a discharge end. An accumulation module is associated with each accumulating zone and includes a photo electric sensor, a microprocessor, and input/output con... | 01/26/1999 |
| 5429225 | Modular pneumatic accumulation conveyor and method An accumulation conveyor includes a product sensor that is positioned along the conveyor at a particular zone for sensing the presence of product at that zone and for causing actuation of the zone upstream of that product sensor with respect to product mo... | 07/04/1995 |
| 5358097 | Accumulation conveyor with retractable sensor A pneumatic accumulation conveyor has an anti-singulation control capable of deactivating the drive of a zone if the product sensor for that zone and substantially all of the product sensors downstream of that zone sense the presence of product in order t... | 10/25/1994 |
| 5316130 | Zero pressure accumulation conveyor A zero-pressure accumulating conveyor including a bed defined by rotatable rollers mounted in parallel sidewalls and powered by an endless drive chain. Pneumatic actuators lift the drive chain into engagement with the rollers to empower same. Sensor rolle... | 05/31/1994 |
| 5238349 | Article sorting and retrieval system An article sorting and retrieval system for use in warehouses and distribution centers wherein articles are stored in vertical racks with open-sided storage bins. The system includes a linearly extensible lower conveyor assembly adapted to transport items... | 08/24/1993 |
| 5193659 | Conveyor A conveyor for arranging articles (9) which comprises a plurality of rollers (5) arranged side-by-side and means for rotating the rollers such that each roller can be rotated at a different rate from rollers adjacent to it. By appropriate selection of the... | 03/16/1993 |
| 5191967 | Conveyor system having non-singulating accumulation conveyor A conveyor system includes an accumulation conveyor that is particularly useful in a location outbound of a sortation spur in combination with a receiving conveyor which receives products from the accumulation conveyor at a generally constant rate. The ac... | 03/09/1993 |
| 5186417 | Aircraft cargo control system An aircraft cargo control system (12) controls powered rollers (24, 26) for moving pallets (28) in the cargo area of an aircraft (30). The control system (12) includes a joy stick (60) for controlling longitudinal movement on the right side (46), left sid... | 02/16/1993 |
| 5060785 | Electrically-powered control system for accumulating conveyor A control arrangement for an accumulating conveyor having a plurality of zones includes an electrically-powered sensor in each zone, and a logic circuit associated with each sensor, each logic circuit comprising a first input, a second input from the sens... | 10/29/1991 |
| 4930618 | Power free triple conveyor This invention relates to a roller assembly for a power free triple conveyor having an overload release device which includes a sprocket mounted on a shaft through a bearing, a roller separately formed and freely rotated on the sprocket, a plurality of sp... | 06/05/1990 |
| 4907692 | Container translating and orienting apparatus and method An apparatus is disclosed for controlling the movement of flat bottomed articles in a plurality of different directions relative to a supporting platform. The article is supported on a plurality of clusters of helical, freely rotatable rollers mounted on ... | 03/13/1990 |
| 4863012 | Accumulating conveyor system An accumulating conveyor system and method for accumulating articles are disclosed. The first embodiment of the conveyor system (10) includes a primary conveyor belt (11) which moves within a transport channel (30) having horizontal rest rails (31). The p... | 09/05/1989 |
| 4844231 | Roller conveyer system A roller conveyer system employs a plurality of driven roller assemblies. Each driven roller assembly comprises a roller and a driven pulley, wherein the driven pulley is connected to a driving device, such as a drive motor via a drive belt for transmitti... | 07/04/1989 |
| 4715596 | Paperboard sheet feeder A paperboard sheet feeder for feeding paperboard blanks to the feed rolls of processing equipment includes a support table and a pair of roller assemblies mounted on the support table. A drive includes gears connected to the roller assemblies through one-... | 12/29/1987 |
| 4620628 | Cable drive conveyor system and a method for conveying articles in a conveyor system A cable drive conveyor system in which a cable drive carried by idler sheaves communicates with conveyor carrier rollers. An endless cable is driven and is carried by the idler sheaves. At least one cable connector connects the two ends of the endless cab... | 11/04/1986 |
| 4588073 | Padded chain live roller conveyor An article conveyor having live rollers forming an article conveying run and in which a continuous padded drive chain is operably mounted to have flexibility in a direction substantially parallel to the conveying run, and in which a first direction of art... | 05/13/1986 |
| 4562920 | Device for the pressureless accumulation of loads on roller conveyors A friction driven live roller accumulation conveyor comprises successive load carrying sections each having at least two live rollers and a detector responsive to the presence of a load. At least one of the live rollers of each section has an associated r... | 01/07/1986 |
| 4533073 | Method of spacing sheets and moving groups of spaced sheets A conveyor section advances a ribbon into a cutting station where sheets are severed from the glass ribbon. The sheets are advanced onto downstream conveyor rolls where the sheet is accelerated for a given period of time to space the trailing edge of the ... | 08/06/1985 |
| 4508212 | Adjustable torque conveyor roller drive A friction clutch for a conveyor roller bearing apparatus wherein a plurality of small thrust springs are disposed between an adjustable nut and a thrust pad to force a drive sprocket against a back-up friction pad connected to the roller axle shaft. Mean... | 04/02/1985 |
| 4505381 | Conveyor roller A roller for a roller conveyor has a circular outer article engaging surface and a transversely extending through bore. A rotatable drive shaft extends through the bore for rotating the roller. The bore in the roller is offset from the transverse center o... | 03/19/1985 |
| 4453627 | Accumulator conveyor A live roller accumulator conveyor has a plurality of zones between its inlet and discharge ends which are arranged in groups. Each zone has a sensor which reacts to the presence of an article therein by deactuating the drive for the adjacent upstream zon... | 06/12/1984 |
| 4349100 | Conveyor A conveyor system is disclosed in which a plurality of free-wheeling conveyor rollers are rotated by means of a driven belt which intermittently contacts the conveyor rollers when driven motion is desired. The rollers may also be braked by means of a seco... | 09/14/1982 |
| 4341546 | Roll drive mechanism for glass sheet processing equipment A roll drive mechanism (14) for a horizontal roller conveyor (12) of glass sheet processing equipment (10) has particular utility with a heating furnace (18) of a glass sheet tempering system. First and second continuous drive loops (22,24) of the drive m... | 07/27/1982 |
| 4325421 | Method and apparatus for cutting and trimming shingles A method and apparatuses are disclosed for making shingles. The method consists of clampingly holding a block of material to be cut and conveying such block while it is clamped along a selected path through the clamping mechanism and causing relative move... | 04/20/1982 |
| 4284190 | Horizontal accumulating conveyor A reversible accumulating conveyor having a pair of support members with apertures, a plurality of carrier rollers connected to the support members, a plurality of floating pressure rollers vertically-slidably disposed within the apertures, a support atta... | 08/18/1981 |