1. An imprinting apparatus comprising:
a fixed die base including a fixed-side stamper holder having a stamper-holding portion for detachably holding an outer peripheral region of a first stamper that has a pattern of protrusions and recesses to be transferred onto a first surface of a recording medium substrate with a hollow disk shape, and a first pressing die on which the first stamper is mounted;
a movable die base movable to approach or separate from the fixed die base, the movable die base including a movable-side stamper holder having a stamper-holding portion for detachably holding an outer peripheral region of a second stamper that has a pattern of protrusions and recesses to be transferred onto a second surface of the recording medium, and a second pressing die that is disposed opposing the first pressing die and mounts, detachably through the second stamper, the recording medium substrate with an outer diameter smaller than that of the second stamper, the pattern of protrusions and recesses of the second stamper being transferred onto the recording medium substrate;
a first sleeve disposed movably in an inner circumferential surface of the first pressing die on the fixed die base and having an end plane that comes into contact with inner periphery of the first surface of the recording medium substrate;
a first enforcing means for enforcing an end plane of the first sleeve in a direction approaching the first surface of the recording medium substrate;
a second sleeve disposed movably in an inner circumferential surface of the second pressing die on the movable die base and having an end plane that comes into contact with inner periphery of the second surface of the recording medium substrate; and
a second enforcing means for enforcing an end plane of the second sleeve in a direction approaching the second surface of the recording medium substrate;
wherein, when the movable die base approaches the fixed die base, the end plane of the first sleeve comes in contact with inner periphery of the first surface of the recording medium substrate opposing to enforcement of the first enforcing means, and the end plane of the second sleeve comes in contact with inner periphery of the second surface of the recording medium substrate opposing to enforcement of the second enforcing means; and
wherein when the movable die base separates from the fixed die base, accompanying the separating movement of the movable die base, the end plane of the first sleeve is moved to separate the recording medium substrate from the first stamper by enforcement of the first enforcing means, and the end plane of the second sleeve is moved to separate the recording medium substrate from the second stamper by enforcement of the second enforcing means.
2. The imprinting apparatus according to claim 1, wherein the first sleeve is provided with a collet pin, and the second sleeve is provided with a collet with which a tip portion of the collet pin selectively couples;
wherein when the movable die base approaches the fixed die base, a coupled condition is established between the tip portion of the collet pin and the collet to hold the recording medium substrate by the tab portion of the collet, the tab portion being allowed to elastically deform; and
wherein when the movable die base separates from the fixed die base, the tip portion of the collet pin and the collet are brought into an uncoupled condition to release the recording medium substrate from the tab portion.
3. The imprinting apparatus according to claim 1, wherein a magnitude of enforcement of the first enforcing means is larger than a magnitude of enforcement of the second enforcing means.
4. The imprinting apparatus according to claim 2, further comprising a first exhausting duct formed within the fixed die base and communicating to a sliding place at which the first enforcing means and an end portion of the first sleeve are disposed, communicates to an outer circumference of a first connection pin that connects the collet pin and the first sleeve; and
a second exhausting duct formed within the movable die base and communicating to a sliding place at which the second enforcing means and an end portion of the second sleeve are disposed, communicates to an inner hole of a second connection pin that connects the collet and the second sleeve.
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.
1. A device for locking an axially movable component (2) of a hydraulic system, wherein the axially movable component (2) can be releasably secured in a positively locking manner in at least one axial position by means of a detent mechanism (4) with at least one detent body (5), and with a release device (6) for releasing the respective detent body (5) from the axially movable component (2), wherein the detent mechanism (4) can be latched and released by means of a clamping piston (7) and using an energy storage mechanism (8), and wherein the clamping piston (7) can be moved in a working chamber (27), which can be subject to the action of a clamping pressure, characterized in that the clamping piston (7) can be adjusted at least into one switching position by a switching device (9), that the clamping pressure can be applied to the clamping piston (7) by means of the switching device (9), and that, in this switching position, the clamping piston can be moved out of its latching position by means of the energy storage mechanism (8) when there is a drop in the clamping pressure.
2. The device according to claim 1, characterized in that in an additional second switching position of the switching device (9), the hydraulic fluid of the clamping piston (7) can be removed from the working chamber (27) into a hydraulic fluid container (T), so that the component (2) can return into its neutral position.
3. The device according to claim 1, characterized in that in a third switching position of the switching device (9), the clamping piston (7) can be locked in each respectively occupied switching position, in particular in the latching position.
4. The device according to claim 1, characterized in that the component (2) is a control slide of a hydraulic directional control valve (3).
5. The device according to claim 1, characterized in that a load pressure (p\u2032) of a consumer (10), which can be actuated preferably by the directional control valve (3), is applied as the clamping pressure to the switching device (9).
6. The device according to claim 2, characterized in that the switching device (9) can be moved manually into at least two, preferably three switching positions (A, B, C).
7. The device according to claim 1, characterized in that when the detent mechanism (4) is in a latching position, the switching device (9) applies to the clamping piston (7) a hydraulic fluid pressure, which corresponds to the initial pressure (p\u2032) of a pressure compensator (11).
8. The device according to claim 2, characterized in that the switching device (9) has a valve member (12) that has at least two, preferably three switching positions (A, B, C), which can be produced by a rotational and translational movement.
9. The device according to claim 8, characterized in that the switching device (9) has a control knob (13), which can be rotated by about 180\xb0 and with which the at least two switching positions (A, B, C) of the valve member (12) of the switching device (9) can be preset.
10. The device according to claim 9, characterized in that the switching device (9) has a neutral position of its rotatable control knob (13), with which the clamping pressure is applied to the clamping piston (7).
11. The device according to claim 4, characterized in that the switching device (9) is integrated into a housing (14) of the hydraulic directional control valve (3) and that the clamping pressure in the housing (14) is guided from the directional control valve (3) to the switching device (9).
12. The device according to claim 4, characterized in that the switching device (9) has a valve member (12), which is formed as the control piston (15), and the longitudinal axis (16) of this valve member runs parallel to a longitudinal axis (17) of a valve member (18) of the hydraulic directional control valve (3).
13. The device according to claim 1, characterized in that the load pressure (p\u2032) is separated from a pressure chamber (6) of the clamping piston (7) by means of a throttle point.