Disposable/reusable core adapters
A core adapter formed as a hollow cylindrical sleeve. A plurality of apertures extend through the sleeve, parallel to the sleeve's longitudinal axis. A plurality of radial apertures are formed in the sleeve for each longitudinal aperture. Each radial aperture is perpendicular to sleeve's axis and intersects a longitudinal aperture. Studs are provided in each radial aperture, initially recessed beneath the sleeve's outer surface. The sleeve's outside diameter is sized for insertion into a 6-inch inside diameter core. The sleeve's inside diameter is the same size as a 3-inch inside diameter core. The adapter is inserted into a 6-inch core until it is flush with the end of the core. Wedge-tipped bars are driven into each of the adapter's longitudinally aligned rows of studs, and against the bottom of each stud, thereby driving the studs perpendicularly away from the sleeve's axis into the core.
1. Apparatus for installing a core adapter in a roll core, the apparatus comprising:
(a) a mandrel having an outside diameter slightly less than an inside diameter of a hollow cylindrical sleeve of the core adapter;
(b) a rod having an inward end coupled to an outward end of the mandrel;
(c) a stop flange mounted on the rod around the outward end of the mandrel;
(d) a drive flange mounted on the rod and displaceable along the rod toward the stop flange;
(e) a plurality of apertures in the stop flange, any one of the stop flange apertures coaxially alignable with any one of a corresponding plurality of longitudinal apertures formed through the sleeve of the core adapter;
(f) a plurality of wedge-tipped bars, each bar having:
(i) an inward tip insertable through one of the stop flange apertures into a corresponding one of the longitudinal apertures of the core adapter; and
(ii) an outward end driveable by the drive flange.
2. Apparatus as defined in claim 1 , further comprising:
(a) a shaft coaxially and rotatably friction-fit mounted in the rod, the shaft extending through the rod and through the mandrel;
(b) an arm coupled to an inward end of the shaft; and
(c) at least one pin pivotally coupled to the arm;
wherein rotation of the rod in a first direction retracts the pin within the mandrel and rotation of the rod in a second direction opposite to the first direction projects the pin from the mandrel.
3. Apparatus as defined in claim 2 , further comprising, for each one of the bars, a set screw mounted on the drive flange and adjustable to fix a displacement between the drive flange and the outward end of one of the bars.
4. Apparatus as defined in claim 3 , wherein each one of the set screws is coaxially aligned with one of the stop flange apertures.
5. Apparatus as defined in claim 4 , wherein each one of the bars and each one of the stop flange apertures is hexagonally cross-sectioned.
6. Apparatus as defined in claim 5 , wherein the outward end of each one of the bars is recessed to receive one of the set screws.
7. Apparatus for installing a core adapter in a roll core, the apparatus comprising:
(a) a mandrel having:
(i) an outside diameter slightly less than an inside diameter of a hollow cylindrical sleeve of the core adapter;
(ii) a plurality of circumferentially spaced, longitudinally extending channels, each channel for slidably receiving the bottoms of one longitudinally aligned row of studs in the core adapter;
(b) a rod having an inward end coupled to an outward end of the mandrel;
(c) a stop flange mounted on the rod around the outward end of the mandrel;
(d) a drive flange mounted on the rod and displaceable along the rod toward the stop flange;
(e) a plurality of apertures in the stop flange, each stop flange aperture coaxially aligned with one of the mandrel channels;
(f) a plurality of wedge-tipped bars, each bar having:
(i) an inward tip insertable through one of the stop flange apertures into a corresponding one of the mandrel channels; and
(ii) an outward end fixed to the drive flange.
8. Apparatus as defined in claim 7 , further comprising:
(a) a shaft coaxially and rotatably friction-fit mounted in the rod, the shaft extending through the rod and through the mandrel;
(b) an arm coupled to an inward end of the shaft; and
(c) at least one pin pivotally coupled to the arm;
wherein rotation of the rod in a first direction retracts the pin within the mandrel and rotation of the rod in a second direction opposite to the first direction projects the pin from the mandrel.
9. Apparatus as defined in claim 8 , wherein the bars and channels have a mating cross-sectional shape, the shape being wider along a radially inward portion of each bar and channel and narrower along a radially outward portion of each bar and channel.
10. Apparatus as defined in claim 9 , wherein each bar is fixed to the drive flange with a sloped wedge surface of the bar facing radially toward a circumferential rim of the drive flange.
11. Apparatus for removing a core adapter from a roll core, the apparatus comprising:
(a) a mandrel having an outside diameter slightly less than an inside diameter of a hollow cylindrical sleeve of the core adapter;
(b) a rod having an inward end coupled to an outward end of the mandrel;
(c) a stop flange mounted on the rod around the outward end of the mandrel;
(d) a drive flange mounted on the rod and displaceable along the rod toward the stop flange;
(e) a plurality of apertures in the stop flange, any one of the stop flange apertures coaxially alignable with any one of a corresponding plurality of longitudinal apertures formed through the sleeve of the core adapter;
(f) a plurality of wedge-tipped bars, each bar having:
(i) an inward tip insertable through one of the stop flange apertures into a corresponding one of the longitudinal apertures of the core adapter; and
(ii) an outward end fixed to the drive flange.
12. Apparatus as defined in claim 11 , further comprising:
(a) a shaft coaxially and rotatably friction-fit mounted in the rod, the shaft extending through the rod and through the mandrel;
(b) an arm coupled to an inward end of the shaft; and
(c) at least one pin pivotally coupled to the arm;
wherein rotation of the rod in a first direction retracts the pin within the mandrel and rotation of the rod in a second direction opposite to the first direction projects the pin from the mandrel.
13. Apparatus as defined in claim 12 , wherein each bar is fixed to the drive flange with a sloped wedge surface of the bar facing radially away from a circumferential rim of the drive flange.