What is claimed is:
1. A hybrid optical recording disc having a substrate and a recording layer disposed over the substrate, the substrate having a read-only (ROM) area in which a groove is modulated by depressions in the substrate and a recordable area in which the groove from the read-only area extends into the substrate in the recordable area, the improvement comprising:
the groove in the read-only area forming wobbling tracks having a depth greater than 170 nm and wherein the depth d2 of the depression in the groove in the read-only area is in a range greater than 170 nm and less than 350 nm.
2. The hybrid optical disc according to claim 1 wherein the groove in the recordable area has a different wobble amplitude than the groove in the read-only area.
3. The hybrid optical disc according to claim 1 wherein the depth d2 of the depression in the groove in the read-only area is in a range greater than 290 nm and less than 330 nm.
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. In a combination hole puncher and sheet material reinforcer machine for punching holes in sheets of material while concurrently attaching annular reinforcing rings thereto employing a punching ram including a shank with a pressure plate secured thereto and a punching tip having a greater cross-sectional area than said shank, and a deck beneath said punching ram having an aperture therethrough coaxially aligned with said punching ram wherein said punching ram is movable in a direction perpendicular to said deck between a retracted position remote therefrom and a punching position with said punching tip projecting through said aperture in said deck, the improvement comprising
a reinforcer loader support mounted above said deck in spaced separation therefrom and defining a loading hatch therein larger in cross-sectional area than said annular reinforcing rings and surrounding said punching ram and said reinforcer support defines a reinforcer loader receptacle,
a reinforcer loader including a body portion that fits into said reinforcer loader receptacle and which has a floor and a reinforcer guide cylinder open at both its top and bottom and projecting up from said reinforcer loader floor, and a reinforcing ring support mounted directly beneath said reinforcer loader floor below said open bottom of said reinforcer guide cylinder and removable from beneath said reinforcer loader floor, and
a plurality of reinforcing rings, each having a center opening smaller in cross-sectional area than said punching tip, stacked in vertical alignment atop each other, wherein said stack of reinforcing rings is initially seated atop said reinforcing ring support and laterally confined within said reinforcer guide cylinder.
2. A combination according to claim 1 wherein said reinforcing ring support has a central opening therethrough coaxially aligned with of said punching ram.
3. A combination according to claim 1 wherein said reinforcing ring support has a circular central opening therethrough with a plurality of radial slits emanating therefrom.
4. A combination according to claim 3 wherein said reinforcing ring support has a plurality of depending protrusions located beyond said radial slits.
5. A combination according to claim 1 wherein said reinforcing ring support has a pull tab projecting forwardly therefrom and a pair of mutually parallel side edges, and said floor beneath said body portion has a pair of laterally spaced ledges for supporting said reinforcing ring support from beneath, whereby said removable reinforcing ring support is disposed in sliding engagement with said laterally spaced ledges.
6. A combination according to claim 1 wherein said reinforcer loader support is comprised of a forwardly projecting shelf with a pair of laterally spaced apart, outwardly projecting, elongated ears depending therefrom, and said reinforcer loader has upright side walls terminating in laterally directed flanges projecting toward each other, and said flanges reside in sliding engagement atop said elongated ears, whereby said flanges slidably engage said ears for movement in a fore and aft direction to allow said reinforcer loader to slide forward for detachment from said reinforcer loader support and alternatively, to slide rearward into engagement with said reinforcer loader support with said loading hatch centered beneath said punching ram.
7. A combination according to claim 1 further wherein said reinforcer loader support is secured relative to and extends upwardly from said deck and further comprising:
a punch mounting tower located rearwardly from said reinforcer loader support and including a pair of upright standards with a punch guide disposed therebetween and defining a punch guide path of punching ram travel oriented perpendicular to said deck and through said loading hatch,
a bell crank mechanism mounted to said punch mounting tower at a bell crank mounting hinge connection located rearwardly from said punch guide and having a punch hinge connection to said shank of said punching ram located directly above said punch guide and having an operating arm hinge connection located rearwardly from said punch hinge connection and forwardly from said mounting hinge connection,
an operating arm coupled to said punch mounting tower at an operating arm mounting hinge connection located forwardly of said punching ram and extending upwardly and rearwardly therefrom and coupled to said bell crank mechanism at said operating arm hinge connection, and
a spring biasing mechanism urging said punching ram upwardly and away from said deck.
8. A method of loading a combination hole punching and sheet material reinforcing machine that has a punching ram for punching holes in said sheet material and which includes a shank: with a pressure plate secured thereto and a punching tip with a greater cross-sectional area than said shank, utilizing a reinforcer loader that has a body portion with a floor and a cylindrical reinforcer guide having an open top and an open bottom and rising from said floor, and a removable bottom panel mounted to said body portion beneath said floor and beneath said open bottom of said reinforcer guide, wherein said bottom panel defines a central opening therethrough, the steps comprising:
inserting into said top of said cylindrical reinforcer guide a stack of vertically aligned reinforcing rings, each having an upper surface with a release coating thereon and an under surface with a pressure-sensitive adhesive coating thereon,
supporting said stack of annular reinforcing rings by said bottom panel of said reinforcer loader,
positioning said reinforcer loader in said hole punching and sheet material reinforcing machine directly beneath said punching ram,
operating said punching ram to push it downwardly and through said stack of reinforcing rings and so that said punching tip passes through said central opening is said bottom panel,
retracting said punching ram upwardly thereby carrying said stack of reinforcing rings upwardly, disposed about said shank of said punching ram and atop said punching tip, and
removing said bottom panel from said body portion of said reinforcer loader.
9. A method according to claim 8 wherein said bottom panel is provided with a tab projecting forwardly and away from said central opening therein, wherein removal of said bottom panel is performed by pulling said tab forwardly to pull said bottom panel completely free from said reinforcer loader.
10. A method according to claim 9 wherein said hole punching and sheet material reinforcing machine is equipped with a reinforcer loader support aligned with said punching ram and said reinforcer loader support includes mutually parallel ears located on opposite sides of said punching ram and projecting forwardly therefrom and said reinforcer loader is provided with mutually parallel flanges configured to cooperate with said ears in sliding engagement therewith, whereby said reinforcer loader is positioned in said hole punching and sheet material reinforcing machine by engaging said flanges with said ears and sliding said reinforcer loader rearwardly to a location beneath said punching ram.