Retractable wheel for paper guiding cylinder |
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| 申请号 | US29611672 | 申请日 | 1972-10-10 | 公开(公告)号 | US3780925A | 公开(公告)日 | 1973-12-25 |
| 申请人 | TERNES N; | 发明人 | TERNES N; | ||||
| 摘要 | The disclosure is directed to a printed paper guiding reel or cylinder having a plurality of small wheel members defining the cylindrical paper engaging surface of the reel. Each of the wheel members is radially retractable to a position of non-engagement to permit selective positioning thereof relative to printed matter which is not yet dried. Retraction of the wheel member is effected by manual movement of the wheel relative to a supporting hub which is retainably disposed in a radial slot in the wheel. The opposite ends of the slot define positions of symmetric and eccentric rotation of the wheel. The slot is narrowed intermediate its ends to force the hub into one stable position or the other, and yielding openings are formed to permit flexure of the wheel in the area of the slot as it is moved between positions. | ||||||
| 权利要求 | 1. Retractable wheel apparatus comprising: a. a substantially solid wheel member of predetermined thickness; b. first and second essentially circular openings formed through said predetermined thickness and respectively defining a first axis of symmetrical rotation and a second axis of eccentric rotation of the wheel member, said first and second openings being interconnected by a passage of reduced size; c. hub means generally conforming in size to the first and second circular openings, the hub means being selectively and resistably movable therebetween through said passage of reduced size; d. the wheel member having relief opening means disposed on each side of the restricted passage, the relief openings being constructed and arranged to permit that portion of the wheel member adjacent the restricted passage to flex laterally as the hub means is moved therethrough. 2. The apparatus defined by claim 1, wherein the first circular opening is sized to permit the wheel member to freely rotate relative to the hub means when it is positioned therein, and the second circular opening is sized to frictionally preclude rotation of the wheel member relative to the hub means when it is positioned therein. 3. The apparatus defined by claim 1, wherein the relief opening means each comprises an elongated opening formed entirely through the predetermined thickness of the wheel member, the elongated relief opening being essentially aligned with each other and with the restricted passage. 4. The apparatus defined by claim 1, wherein the hub means comprises: a. a hub member having a flanged base and an axially extending portion sized for cooperation with the first and second circular openings, the flanged base being greater in size than said circular openings; b. a spacer constructed to fit over the axially extending portion of the hub member, whereby the wheel member is retained between the spacer and flanged base; c. and means for holding the spacer on the axially extending portion of the hub member. 5. The apparatus defined by claim 4, wherein the axially extending portion of the hub member has a peripheral groove formed in its extreme end, and the spacer holding means comprises a snap ring removably disposed in the peripheral groove. 6. The apparatus defined by claim 4, wherein the axially extending portion of the hub means has a first cylindrical stepped portion sized to cooperate with the first and second openings, and a second cylindrical stepped portion sized to cooperate with the spacer. 7. The apparatus defined by claim 1, wherein the hub means comprises: a. a hub member having an axially extending portion cooperable with the first and second circular openings; b. and means for retaining the wheel member on the hub member; c. the hub member having an axially bore formed therethrough to receive a mounting rod. 8. The apparatus defined by claim 7, wherein the axial bore is tapered from one end to the other, and the axially extendIng portion is slotted axially at the smaller bore end to define radially expandable segments. 9. The apparatus defined by claim 8, wherein the axial slot is diametrical to define semicircular segments. 10. The apparatus defined by claim 7, wherein the hub member and wheel member are formed from synthetic material having a low coefficient of friction. 11. The apparatus defined by claim 1, wherein the peripheral face of the wheel member is beveled to reduce the size of its peripheral edge. |
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