US3840194A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Core plug
Assignee: Uniflex Inc
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Filing: 1972-03-09
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Granted: 1974-10-08
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Expires: 1992-03-09
Abstract
Abstract A core plug for mounting in the opposite ends of a tubular roll of material for rotatably supporting the roll about a spindle. The core comprises an annular, web-like, base portion which includes an axially-extended sleeve member defining a central opening adapted to receive the spindle member. A generally cylindrical rim integral with the base portion terminates in a radially-extending flange at the end of the rim opposite the base portion. A plurality of stiffening members are located intermediate two locations on the rim in such a manner that each of the stiffening members is tangent to the sleeve member and no stiffening member terminates at the sleeve member. Thus, forces tending to crush or deflect the rim will be transmitted to another portion of the rim without tending to crush or deflect the sleeve member. The characteristics of the location of the stiffening members are described in detail. The core plug also includes a plurality of axially-aligned rib members on the outer surface of the rim, each of which includes a plurality of protuberances thereon, the ribs and protuberances preventing the relative rotation of the core and the tubular roll of material.
Inventors
- 👤 E Vetter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 15:36
CPC Classifications
B; B65; B65H; B65H75/00; B65H75/02; B65H75/18; B65H75/185
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
218 words
A core plug for a tubular roll of material having an inner core diameter comprising: an annular base portion which includes an axially-extending sleeve member defining a central opening in said base portion and adapted to receive a spindle member for rotatably supporting said core plug and said roll about an axis, said sleeve member being integral with said base portion and generally cylindrical about said axis; a rim integral with said base portion at the radially outermost portion thereof, said rim being generally cylindrical about the axis and having an axial length; and a plurality of stiffening members each having a width in the direction of said axis which is equal to or less than the axial length of said rim, said plurality of stiffening members extending substantially linearly between two spaced-apart locations on said rim so that each of said stiffening members is tangent to and in contact with said sleeve member at a location thereon, at least one surface of each of said stiffening members being at least in part substantially planar and wherein each end of each of said stiffening members terminates at said rim and whereby forces tending to collapse said rim are resisted by said stiffening members in such a manner that said forces do not tend to collapse said sleeve member.
Claim 2
Dependent Claim
218 words
A core plug for a tubular roll of material having an inner core diameter comprising: an annular base portion which includes an axially-extending sleeve member defining a central opening in said base portion and adapted to receive a spindle member for rotatably supporting said core plug and said roll about an axis, said sleeve member being integral with said base portion and generally cylindrical about said axis; a rim integral with said base portion at the radially outermost portion thereof, said rim being generally cylindrical about the axis and having an axial length; and a plurality of stiffening members each having a width in the direction of said axis which is equal to or less than the axial length of said rim, said plurality of stiffening members extending substantially linearly between two spaced-apart locations on said rim so that each of said stiffening members is tangent to and in contact with said sleeve member at a location thereon, at least one surface of each of said stiffening members being at least in part substantially planar and wherein each end of each of said stiffening members terminates at said rim and whereby forces tending to collapse said rim are resisted by said stiffening members in such a manner that said forces do not tend to collapse said sleeve member.
Claim 3
Dependent Claim
26 words
The core plug as defined in claim 1 wherein said rim terminates in a radially-extending flange at the end of said rim opposite said base portion.
Claim 4
Dependent Claim
25 words
The core plug as set forth in claim 1 wherein said one surface of each of said stiffening members is substantially parallel to said axis.
Claim 5
Dependent Claim
54 words
The core plug as set forth in claim 3 wherein the stiffening members are arranged in pairs separated by a dIstance about equal to the outer diameter of the sleeve member so that each of a pair of said stiffening members lies substantially on a tangent to the outer surface of said sleeve member.
Claim 6
Dependent Claim
29 words
The core plug as set forth in claim 4 wherein the portions of said stiffening members which terminate on said rim terminate substantially equally spaced along said rim portion.
Claim 7
Dependent Claim
44 words
The core plug as set forth in claim 5 wherein the portion of one of a pair of stiffening members which terminates on said rim is substantially coterminous with the portion of one of another pair of stiffening members which terminates on said rim.
Claim 8
Dependent Claim
64 words
The core plug as defined in claim 4 wherein the pairs of stiffening members are arranged so that, in a plan view of said core plug, when a first pair lies substantially vertically, a second pair lies substantially horizontally, a third pair lies at an angle sloping upwardly to the left and a fourth pair lies at an angle sloping upwardly to the right.
Claim 9
Dependent Claim
197 words
The core plug as set forth in claim 7 wherein the locations of the stiffening members are further characterized when seen in said plan view as follows: the left member of said fourth pair is substantially coterminous at one end with one end of the upper member of said second pair and at the other end with one end of the right member of said first pair; the right member of said fourth pair is substantially coterminous at one end with one end of the left member of said first pair and at the other end with the lower member of said second pair; the left member of the third pair is coterminous at one end with the other end of the lower member of said second pair and at the other end with the other end of the right member of said first pair; said right member of said third pair is coterminous at one end with the other end of the upper member of said second pair and at the other end with the other end of the left member of said first pair; and all of said coterminous locations lying substantially at said rim.
Claim 10
Dependent Claim
30 words
The core plug as set forth in claim 1 wherein said rim is slightly inwardly tapered so that the narrowest portion of said rim is substantially adjacent said base portion.
Claim 11
Dependent Claim
24 words
The core plug as set forth in claim 1 further including a plurality of axially-aligned rib members on the outer surface of said rim.
Claim 12
Dependent Claim
21 words
The core plug as set forth in claim 10 further including a plurality of protuberances on each of said rib members.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-10-07 | 1978-04-08 | 1978-10-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-10-07 | 1982-04-08 | 1982-10-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-10-07 | 1986-04-08 | 1986-10-08 | $7700.00 | Window Closed / Lapsed |