Electromagnetic cutting apparatus particularly for use, etc. |
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| 申请号 | US31992372 | 申请日 | 1972-12-22 | 公开(公告)号 | US3841185A | 公开(公告)日 | 1974-10-15 |
| 申请人 | SHOE B CO INC; | 发明人 | BARAN M; | ||||
| 摘要 | An electromagnetic cutting apparatus for cutting binding tape sewn to the upper and side edges of shoe upper components at the leading and trailing edges of the components includes an electromagnetically operated plunger with a self-adjusting blade on the bottom end thereof, photoelectric sensors for detecting the leading and trailing edges of the components, and an electronic circuit for rapidly charging a coil surrounding a core on the plunger for driving the plunger and blade downwardly to cut the tape. Condensers in the electronic circuit are normally charged and, in response to signals from the photoelectric sensors, instantaneously discharge into the coil to actuate the plunger, which after cutting the tape is returned to a rest position by a helical spring mounted on the plunger. | ||||||
| 权利要求 | 1. A cutting apparatus for cutting a strip of binding tape connected to a shoe upper component and extending beyond at least one edge thereof, the cutting being performed at said one edge, said apparatus comprising a frame; a yoke on said frame; an arm slidably mounted in said yoke; a table portion on said frame for receiving said component and tape; a casing on one end of said arm opposite said yoke and above said table portion of the frame; plunger means housed in said casing and projecting therefrom toward said table portion of the frame; blade means on the outer end of said plunger for cutting said tape during passage of the component and tape over said table portion of the frame; electromagnetic drive means for moving said plunger and blade means from a rest position to a cutting position; sensor means for actuating said drive means when said component and said tape are properly located beneath said blade means; and means for returning said plunger means and said blade means to said rest position, said electromagnetic drive means including a core formed of magnetic material mounted on said plunger means in said casing; a coil around said core; and circuit means for energizing said coil in response to signals from said sensor means, said sensor means including photoelectric cells positioned in the path of travel of said component in advance of said blade means, and a light source for illuminating said photoelectric cells. 2. A cutting apparatus according to claim 1, including an anvil removably mounted in said table portion beneath said blade means; and a hard metal insert in said anvil for receiving said blade means during cutting of the tape. 3. A cutting apparatus according to claim 2, including a plate removably mounted on said frame adjacent said anvil, said sensor means including photoelectric cells in said plate means, said photoelectric cells being positioned in the path of travel of said components over said table portion in advance of said blade means, and a light source above said table portion for illuminating said photoelectric cells. 4. A cutting apparatus according to claim 3, wherein said blade means is a flat blade pivotally mounted on the outer end of said plunger means and having a flat outer cutting edge extending transversely of said tape, whereby the blade is self-adjusting to ensure complete cutting action by the blade. 5. A cutting apparatus according to claim 1, wherein said circuit means includes a pair of normally charged condenser means connected to said coil; and means for instantaneously discharging one or the other of said condenser means into said coil in response to signals from said photoelectric cells indicating that the component and tape are in position for cutting. |
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