Apparatus and methods usable in connection with dispensing flexible sheet material from a roll
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
G01R-027/26
G01R-033/00
G01N-027/22
출원번호
US-0211301
(2002-08-05)
발명자
/ 주소
Morris, Andrew R.
출원인 / 주소
Georgia-Pacific Corp.
대리인 / 주소
Banner & Witcoff, Ltd.
인용정보
피인용 횟수 :
36인용 특허 :
75
초록▼
A proximity sensor circuit of a powered dispenser for dispensing individual sheet segments from a continuous roll of sheet material includes an antenna, an oscillator circuit and an automatic sensitivity control circuit. The antenna has a baseline stray capacitance. The oscillator circuit is coupled
A proximity sensor circuit of a powered dispenser for dispensing individual sheet segments from a continuous roll of sheet material includes an antenna, an oscillator circuit and an automatic sensitivity control circuit. The antenna has a baseline stray capacitance. The oscillator circuit is coupled to the antenna and generates an oscillation signal having a predetermined oscillation amplitude corresponding to the baseline stray capacitance of the antenna. Preferably, the oscillator circuit has a Colpitts oscillator-type topography. The oscillation amplitude of the oscillation signal increases in response to an increase in stray capacitance from the baseline stray capacitance of the antenna and decreases in response to a decrease in stray capacitance from the baseline stray capacitance of the antenna. The automatic sensitivity control circuit is coupled to the oscillator circuit and detects a change in the oscillation amplitude of the oscillator signal.
대표청구항▼
A proximity sensor circuit of a powered dispenser for dispensing individual sheet segments from a continuous roll of sheet material includes an antenna, an oscillator circuit and an automatic sensitivity control circuit. The antenna has a baseline stray capacitance. The oscillator circuit is coupled
A proximity sensor circuit of a powered dispenser for dispensing individual sheet segments from a continuous roll of sheet material includes an antenna, an oscillator circuit and an automatic sensitivity control circuit. The antenna has a baseline stray capacitance. The oscillator circuit is coupled to the antenna and generates an oscillation signal having a predetermined oscillation amplitude corresponding to the baseline stray capacitance of the antenna. Preferably, the oscillator circuit has a Colpitts oscillator-type topography. The oscillation amplitude of the oscillation signal increases in response to an increase in stray capacitance from the baseline stray capacitance of the antenna and decreases in response to a decrease in stray capacitance from the baseline stray capacitance of the antenna. The automatic sensitivity control circuit is coupled to the oscillator circuit and detects a change in the oscillation amplitude of the oscillator signal. Perrin et al., 242/560.1; US-4464622, 19840800, Franklin, 324/067; US-4569467, 19860200, Kaminstein, 242/563; US-4611768, 19860900, Voss et al., 242/565.2; US-4666099, 19870500, Hoffman et al., 242/564.1; US-4712461, 19871200, Rasmussen, 083/334; US-4721265, 19880100, Hawkins, 242/564; US-4738176, 19880400, Cassia, 083/208; US-4756485, 19880700, Bastian et al., 242/560.1; US-4786005, 19881100, Hoffman et al., 242/564.1; US-4790490, 19881200, Chakravorty, 242/564; US-4796825, 19890100, Hawkins, 242/560.1; US-4807824, 19890200, Gains et al., 083/208; US-4823663, 19890400, Hamlin, 312/034.12; US-4826262, 19890500, Hartman et al., 242/560.1; US-4831488, 19890500, Playe, 361/221; US-4846412, 19890700, Morand, 242/564.4; US-4960248, 19901000, Bauer et al., 247/564.4; US-4992907, 19910200, Shreeve et al., 361/220; US-5031258, 19910700, Shaw, 004/623; US-5205454, 19930400, Schutz et al., 225/001; US-5217035, 19930600, Van Marcke, 137/001; US-5235882, 19930800, Rabourn, 083/076.1; US-5244161, 19930900, Wirtz-Odenthal, 242/560.1; US-5257711, 19931100, Wirtz-Odenthal, 225/014; US-5271574, 19931200, Formon et al., 242/560.3; US-5294192, 19940300, Omdoll et al., 242/560.1; US-5299407, 19940400, Schuttler et al., 053/399; US-5302167, 19940400, Kley et al., 493/400; US-5335811, 19940800, Morand, 221/045; US-5365783, 19941100, Zweifel, 073/304.C; US-5400982, 19950300, Collins, 242/560; US-5452832, 19950900, Niada, 225/011; US-5505129, 19960400, Greb et al., 101/219; US-5511743, 19960400, Kozlowsky et al., 242/526; US-5526973, 19960600, Boone et al., 225/034; US-5553522, 19960900, Boldrini et al., 083/013; US-5558302, 19960900, Jesperson, 242/560; US-5604992, 19970200, Robinson, 034/090; US-5625327, 19970400, Carroll et al., 331/074; US-5630526, 19970500, Moody, 221/045; US-5694653, 19971200, Harald, 004/628; US-5704566, 19980100, Schutz et al., 242/595; US-5730165, 19980300, Philipp, 137/001; US-5772291, 19980600, Byrd et al., 312/034.22; US-5806203, 19980900, Robinson, 034/090; US-5823083, 19981000, Obertegger et al., 083/175; US-5833413, 19981100, Cornelius, 410/119; US-5860344, 19990100, Yamamoto et al., 083/365; US-5868343, 19990200, Granger, 242/564.4; US-5899406, 19990500, Payne, 242/552; US-5915645, 19990600, Granger, 242/560; US-5950898, 19990900, Menna, 225/106; US-5952835, 19990900, Coveley, 324/671; US-5974764, 19991100, Anstey et al., 053/118; US-5979822, 19991100, Morand et al., 242/564.2; US-6032898, 20000300, LaCount et al., 242/564.2; US-6067673, 20000500, Paese et al., 004/623; US-6069354, 20000500, Alfano et al., 250/221; US-6105898, 20000800, Byrd et al., 242/564.1; US-6145779, 20001100, Johnson et al., 242/560.1; US-6152397, 20001100, Purcell, 242/560.1; US-6279777, 20010800, Goodin et al., 222/052; US-6293486, 20010900, Byrd et al., 242/564.1; US-6354533, 20020300, Jespersen, 242/560.1; US-6412679, 20020700, Formon et al., 225/014; US-6419136, 20020700, Formon et al., 225/014; US-20020030061, 20020300, Formon, 221/013; US-20020109034, 20020800, Moody et al., 242/559.1; US-20020109036, 20020800, Denen et al., 242/560
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