Patents by Inventor Michael D. Sawford
Michael D. Sawford has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 10576476Abstract: A shredding machine for domestic or office use having a feed passage 3 leading to a cutting mechanism 10, 11 powered by an electric motor, has a thickness measuring device 15 for measuring the thickness of bundles of paper fed through the feed passage and the machine is controlled by a microprocessor which receives signals from the thickness measuring device and prevents the cutting mechanism from being energised if the thickness measured is above a threshold determined by the microprocessor. The thickness gauging device is deactivated during shredding until the material is shredded so that rippling or flapping of the material within the feed passage will not cause false readings as to the amount of material inserted into the feed passage.Type: GrantFiled: May 4, 2017Date of Patent: March 3, 2020Assignee: ACCO Brands CorporationInventors: Paul A. Aries, Michael D. Sawford
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Publication number: 20170232443Abstract: A shredding machine for domestic or office use having a feed passage 3 leading to a cutting mechanism 10, 11 powered by an electric motor, has a thickness measuring device 15 for measuring the thickness of bundles of paper fed through the feed passage and the machine is controlled by a microprocessor which receives signals from the thickness measuring device and prevents the cutting mechanism from being energised if the thickness measured is above a threshold determined by the microprocessor. The thickness gauging device is deactivated during shredding until the material is shredded so that rippling or flapping of the material within the feed passage will not cause false readings as to the amount of material inserted into the feed passage.Type: ApplicationFiled: May 4, 2017Publication date: August 17, 2017Inventors: Paul A. Aries, Michael D. Sawford
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Patent number: 9669410Abstract: A shredding machine for domestic or office use having a feed passage 3 leading to a cutting mechanism 10, 11 powered by an electric motor, has a thickness measuring device 15 for measuring the thickness of bundles of paper fed through the feed passage and the machine is controlled by a microprocessor which receives signals from the thickness measuring device and prevents the cutting mechanism from being energized if the thickness measured is above a threshold determined by the microprocessor. The microprocessor varies the threshold in accordance with electrical supply voltage, the electric motor temperature and the electric current drawn by the motor during a previous shredding operation, so that the maximum thickness the shredder will accept can be reduced automatically when motor temperature increases or as the effectiveness of the machine deteriorates throughout its working life.Type: GrantFiled: August 1, 2013Date of Patent: June 6, 2017Assignee: ACCO Brands CorporationInventors: Paul A. Aries, Michael D. Sawford
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Publication number: 20150224513Abstract: A shredding machine for domestic or office use having a feed passage 3 leading to a cutting mechanism 10, 11 powered by an electric motor, has a thickness measuring device 15 for measuring the thickness of bundles of paper fed through the feed passage and the machine is controlled by a microprocessor which receives signals from the thickness measuring device and prevents the cutting mechanism from being energised if the thickness measured is above a threshold determined by the microprocessor. The microprocessor varies the threshold in accordance with electrical supply voltage, the electric motor temperature and the electric current drawn by the motor during a previous shredding operation, so that the maximum thickness the shredder will accept can be reduced automatically when motor temperature increases or as the effectiveness of the machine deteriorates throughout its working life.Type: ApplicationFiled: April 27, 2015Publication date: August 13, 2015Inventors: Paul A. Aries, Michael D. Sawford
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Publication number: 20130313346Abstract: A shredding machine for domestic or office use having a feed passage 3 leading to a cutting mechanism 10, 11 powered by an electric motor, has a thickness measuring device 15 for measuring the thickness of bundles of paper fed through the feed passage and the machine is controlled by a microprocessor which receives signals from the thickness measuring device and prevents the cutting mechanism from being energised if the thickness measured is above a threshold determined by the microprocessor. The microprocessor varies the threshold in accordance with electrical supply voltage, the electric motor temperature and the electric current drawn by the motor during a previous shredding operation, so that the maximum thickness the shredder will accept can be reduced automatically when motor temperature increases or as the effectiveness of the machine deteriorates throughout its working life.Type: ApplicationFiled: August 1, 2013Publication date: November 28, 2013Applicant: ACCO UK LimitedInventors: Paul A. Aries, Michael D. Sawford
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Publication number: 20120187230Abstract: A shredding machine for domestic or office use having a feed passage 3 leading to a cutting mechanism 10, 11 powered by an electric motor, has a thickness measuring device 15 for measuring the thickness of bundles of paper fed through the feed passage and the machine is controlled by a microprocessor which receives signals from the thickness measuring device and prevents the cutting mechanism from being energised if the thickness measured is above a threshold determined by the microprocessor. The microprocessor varies the threshold in accordance with electrical supply voltage, the electric motor temperature and the electric current drawn by the motor during a previous shredding operation, so that the maximum thickness the shredder will accept can be reduced automatically when motor temperature increases or as the effectiveness of the machine deteriorates throughout its working life.Type: ApplicationFiled: April 3, 2012Publication date: July 26, 2012Applicant: ACCO UK LIMITEDInventors: Paul A. Aries, Michael D. Sawford
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Patent number: 8162244Abstract: A shredding machine for domestic or office use having a feed passage 3 leading to a cutting mechanism 10, 11 powered by an electric motor, has a thickness measuring device 15 for measuring the thickness of bundles of paper fed through the feed passage and the machine is controlled by a microprocessor which receives signals from the thickness measuring device and prevents the cutting mechanism from being energised if the thickness measured is above a threshold determined by the microprocessor. The microprocessor varies the threshold in accordance with electrical supply voltage, the electric motor temperature and the electric current drawn by the motor during a previous shredding operation, so that the maximum thickness the shredder will accept can be reduced automatically when motor temperature increases or as the effectiveness of the machine deteriorates throughout its working life.Type: GrantFiled: July 30, 2008Date of Patent: April 24, 2012Assignee: ACCO UK LimitedInventors: Paul A. Aries, Michael D. Sawford
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Publication number: 20110180641Abstract: A shredding machine for domestic or office use having a feed passage 3 leading to a cutting mechanism 10, 11 powered by an electric motor, has a thickness measuring device 15 for measuring the thickness of bundles of paper fed through the feed passage and the machine is controlled by a microprocessor which receives signals from the thickness measuring device and prevents the cutting mechanism from being energised if the thickness measured is above a threshold determined by the microprocessor. The microprocessor varies the threshold in accordance with electrical supply voltage, the electric motor temperature and the electric current drawn by the motor during a previous shredding operation, so that the maximum thickness the shredder will accept can be reduced automatically when motor temperature increases or as the effectiveness of the machine deteriorates throughout its working life.Type: ApplicationFiled: April 8, 2011Publication date: July 28, 2011Applicant: ACCO UK LIMITEDInventors: Paul A. Aries, Michael D. Sawford
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Patent number: 7922110Abstract: A shredding machine is disclosed for shredding sheet material such as paper documents. The machine comprises an electric cutting mechanism which is operable to shred the sheet material, and has a collection bin arranged below the cutting mechanism for collection of the resulting shreds. The collection bin is movable in a pivotal manner between a first position in which it permits operation of the cutting mechanism and collects the shreds, and a second position in which it stops operation of the cutting mechanism. The bin is configured to move from the first position to the second position in response to the weight of shreds collected in the bin and the force acting on the collected shreds by fresh shreds exiting the cutting mechanism exceeding a predetermined threshold value.Type: GrantFiled: June 27, 2008Date of Patent: April 12, 2011Assignee: ACCO UK LimitedInventors: Michael D. Sawford, Kaush Patel, Paul A. Aries
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Publication number: 20090032629Abstract: A shredding machine for domestic or office use having a feed passage 3 leading to a cutting mechanism 10, 11 powered by an electric motor, has a thickness measuring device 15 for measuring the thickness of bundles of paper fed through the feed passage and the machine is controlled by a microprocessor which receives signals from the thickness measuring device and prevents the cutting mechanism from being energised if the thickness measured is above a threshold determined by the microprocessor. The microprocessor varies the threshold in accordance with electrical supply voltage, the electric motor temperature and the electric current drawn by the motor during a previous shredding operation, so that the maximum thickness the shredder will accept can be reduced automatically when motor temperature increases or as the effectiveness of the machine deteriorates throughout its working life.Type: ApplicationFiled: July 30, 2008Publication date: February 5, 2009Applicant: ACCO UK LimitedInventors: Paul A. Aries, Michael D. Sawford
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Publication number: 20090001203Abstract: A shredding machine is disclosed for shredding sheet material such as paper documents. The machine comprises an electric cutting mechanism which is operable to shred the sheet material, and has a collection bin arranged below the cutting mechanism for collection of the resulting shreds. The collection bin is movable in a pivotal manner between a first position in which it permits operation of the cutting mechanism and collects the shreds, and a second position in which it stops operation of the cutting mechanism. The bin is configured to move from the first position to the second position in response to the weight of shreds collected in the bin and the force acting on the collected shreds by fresh shreds exiting the cutting mechanism exceeding a predetermined threshold value (FIG. 1).Type: ApplicationFiled: June 27, 2008Publication date: January 1, 2009Applicant: ACCO UK LIMITEDInventors: Michael D. Sawford, Kaush Patel, Paul A. Aries