US3924743A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus and process for plugging a paper roll core
Assignee: Individual
•
Filing: 1974-07-08
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Granted: 1975-12-09
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Expires: 1994-07-08
Abstract
Abstract A relatively thin disc-shaped plug alternatively made from a variety of materials has a double-tapered perimeter and a central hole, and is sized to fit forcibly within the core of a paper roll at the end thereof. The plug is placed in the paper roll core by a mechanical insertion apparatus having resiliently mounted plug guide fingers and a powered plunger which forces the plug into the core between the fingers to a predetermined depth and thereafter automatically retracts the guide fingers from the core. Arm-like stops extending forwardly from the front of the insertion apparatus abut against the paper roll or other surface to steady the apparatus and prevent the fingers from being inserted into the core too far. The plug is installed in the paper roll by loading the insertion device, placing its guide fingers into the end of the paper roll core to a predetermined depth and actuating the plunger.
Inventors
- 👤 Franklin C Bittner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 16:12
CPC Classifications
B; B65; B65H; B65H75/00; B65H75/02; B65H75/18; B65H75/185; B65H75/50; B65H2402/00; B65H2402/40; B65H2402/41; B65H2402/414; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49826; Y10T29/49945
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
171 words
A deformable plugged paper roll core having a predetermined inside diameter corresponding to said core''s undeformed condition, and a plug inserted coaxially within one end of said core, said plug having a generally double-tapered circular perimeter defined by a first portion of said plug having a diameter greater than said core''s predetermined inside diameter and respective plug portions on either side of said first portion decreasing in diameter therefrom for deforming said core at a junction between said plug perimeter and the interior of said core, said plug being inserted in said core adjacent said end thereof at least to a sufficient depth that said first portion of said plug is recessed at a location entirely within said core spaced inwardly from said end expansively deforming said core at said recessed location, said core throughout that portion of said junction of said core and plug located outwardly of said recessed location having an inside diameter which is less than the expansively deformed inside diameter of said core at said recessed location.
Claim 2
Dependent Claim
171 words
A deformable plugged paper roll core having a predetermined inside diameter corresponding to said core''s undeformed condition, and a plug inserted coaxially within one end of said core, said plug having a generally double-tapered circular perimeter defined by a first portion of said plug having a diameter greater than said core''s predetermined inside diameter and respective plug portions on either side of said first portion decreasing in diameter therefrom for deforming said core at a junction between said plug perimeter and the interior of said core, said plug being inserted in said core adjacent said end thereof at least to a sufficient depth that said first portion of said plug is recessed at a location entirely within said core spaced inwardly from said end expansively deforming said core at said recessed location, said core throughout that portion of said junction of said core and plug located outwardly of said recessed location having an inside diameter which is less than the expansively deformed inside diameter of said core at said recessed location.
Claim 3
Dependent Claim
37 words
The paper roll core of claim 1 wherein said inside diameter of said core, throughout said outward portion of said junction of said core and plug, decreases gradually in a direction toward said end of said core.
Claim 4
Dependent Claim
37 words
The paper roll core of claim 1 wherein said respective plug portions on either side of said first portion each decrease in diameter gradually to a face having a diameter less than said core''s predetermined inside diameter.
Claim 5
Dependent Claim
21 words
The paper roll core of claim 1 wherein said plug includes means defining a hole in its center extending axially therethrough.
Claim 6
Dependent Claim
12 words
The paper roll core of claim 1 wherein said plug is disc-shaped.
Claim 7
Dependent Claim
33 words
The paper roll core of claim 3 wherein the ratio of said diameter of said first portion of said plug to the axial thickness of said plug is between about 5 and 6.
Claim 8
Dependent Claim
26 words
The paper roll core of claim 1 wherein said respective portions of decreasing diameter on either side of said first portion of said plug are symmetrical.
Claim 9
Dependent Claim
33 words
The paper roll core of claim 1 wherein said respective portions of decreasing diameter on either side of said first portion of said plug are recessed entirely within said end of said core.
Claim 10
Dependent Claim
16 words
The paper roll core of claim 1 wherein said plug is made of a particle board.
Claim 11
Dependent Claim
14 words
The paper roll core of claim 1 wherein said plug is made of plywood.
Claim 12
Dependent Claim
15 words
The paper roll core of claim 1 wherein said plug is made of a plastic.
Claim 13
Dependent Claim
14 words
The paper roll core of claim 1 wherein said plug is made of steel.
Claim 14
Dependent Claim
16 words
The paper roll core of claim 1 wherein said plug is made of a ceramic material.
Claim 15
Dependent Claim
176 words
A process for plugging a deformable paper roll core having a predetermined inside diameter, said process comprising inserting a paper roll plug coaxially into one end of said core and thereby deforming said core at a junction between the interior of said core and the perimeter of said plug, said plug having a double-tapered circular perimeter defined by a first portion of said plug having a diameter greater than the inside diameter of said core and respective plug portions on either side of said first portion decreasing in diameter therefrom, said method further comprising inserting said plug a sufficient distance Into said core that said first portion of said plug is recessed at a location entirely within said core spaced inwardly from said end, thereby expansively deforming said core at said recessed location, and shaping said deformable core throughout that portion of said junction of said core and plug located outwardly of said recessed location to have an inside diameter which is less than the expansively deformed inside diameter of said core at said recessed location.
Claim 16
Dependent Claim
176 words
A process for plugging a deformable paper roll core having a predetermined inside diameter, said process comprising inserting a paper roll plug coaxially into one end of said core and thereby deforming said core at a junction between the interior of said core and the perimeter of said plug, said plug having a double-tapered circular perimeter defined by a first portion of said plug having a diameter greater than the inside diameter of said core and respective plug portions on either side of said first portion decreasing in diameter therefrom, said method further comprising inserting said plug a sufficient distance Into said core that said first portion of said plug is recessed at a location entirely within said core spaced inwardly from said end, thereby expansively deforming said core at said recessed location, and shaping said deformable core throughout that portion of said junction of said core and plug located outwardly of said recessed location to have an inside diameter which is less than the expansively deformed inside diameter of said core at said recessed location.
Claim 17
Dependent Claim
44 words
The process of claim 12 wherein said shaping of said deformable core includes shaping the inside diameter of said core, throughout said outward portion of said junction of said core and plug, to decrease gradually in a direction toward said end of said core.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-12-08 | 1979-06-09 | 1979-12-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-12-08 | 1983-06-09 | 1983-12-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-12-08 | 1987-06-09 | 1987-12-09 | $7700.00 | Window Closed / Lapsed |