US3823892A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Expandable roll core shaft unit
Assignee: Didde Web Press Corp
•
Filing: 1972-09-05
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Granted: 1974-07-16
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Expires: 1992-09-05
Abstract
Abstract A mechanically operated, expandable spool useful as a roll core shaft unit and having a plurality of longitudinally extending segments symmetrically located about a central shaft. A longitudinally movable, tubular member is located intermediate the shaft and segments with cam surfaces disposed to engage follower wheels carried by each of the segments. A drive collar carried by the shaft is threaded to the tubular member to drive the latter longitudinally relative to the segments causing the cam and follower to shift the segments radially and concentrically relative to the shaft to engage and disengage a roll of material. In one form the segments are rectangular bars having sharp corners for positively gripping a roll core carrying the material, and in another form the segments have circular outer surfaces allowing wind-up of the material directly therein.
Inventors
- 👤 D Glaser
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 10:44
CPC Classifications
B; B65; B65H; B65H75/00; B65H75/02; B65H75/18; B65H75/24; B65H75/242; B65H75/248; B65H75/2484
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
87 words
An expandable spool comprising: an elongated shaft; a plurality of elongated, rigid, apertured rods positioned in circumferentially spaced relationship about said shaft; a plurality of pins extending outwardly from said shaft and received in the apertures of respective rods; an axially shiftable sleeve positioned between said shaft and rods, said sleeve being operable upon axial shifting thereof to engage said rods to effect simultaneous radial movement of the latter with respect to said shaft; and means for axially shifting said sleeve to thereby radially move said rods.
Claim 2
Dependent Claim
87 words
An expandable spool comprising: an elongated shaft; a plurality of elongated, rigid, apertured rods positioned in circumferentially spaced relationship about said shaft; a plurality of pins extending outwardly from said shaft and received in the apertures of respective rods; an axially shiftable sleeve positioned between said shaft and rods, said sleeve being operable upon axial shifting thereof to engage said rods to effect simultaneous radial movement of the latter with respect to said shaft; and means for axially shifting said sleeve to thereby radially move said rods.
Claim 3
Dependent Claim
23 words
A spool as set forth in claim 1, wherein said rods are of substantially identical configuration and are symmentrically arranged about said shaft.
Claim 4
Dependent Claim
22 words
A spool as set forth in claim 2, wherein each of said rods has a cylindrical outer surface remote from said shaft.
Claim 5
Dependent Claim
17 words
A spool as set forth in claim 2, wherein each of said rods is of polygonal cross-section.
Claim 6
Dependent Claim
15 words
A spool as set forth in claim 4, wherein said rods is of rectangular cross-section.
Claim 7
Dependent Claim
45 words
A spool as set forth in claim 1, wherein said sleeve has slots therein through which said pins extend to be received in the apertures of respective rods, said slots being elongated and axially aligned with said shaft to permit axially shifting of the sleeve.
Claim 8
Dependent Claim
57 words
A spool as set forth in claim 6, wherein said sleeve includes cam surfaces disposed in corresponding relationship to each of said rods, there being a follower carried by each of said rods operable to engage the corresponding cam surface to effect said simultaneous radial movement of the rod in response to axially shifting of the sleeve.
Claim 9
Dependent Claim
23 words
A spool as set forth in claim 7, wherein each of said followers comprises a follower wheel rotatably mounted on the corresponding rod.
Claim 10
Dependent Claim
26 words
A spool as set forth in claim 2, wherein is provided means circumscribing said rods and biasing the same radially inwardly with respect to said shaft.
Claim 11
Dependent Claim
25 words
A spool as set forth in claim 1, wherein is provided mechanism interconnecting said shaft and said respective rods to prevent relative axial movement therebeween.
Claim 12
Dependent Claim
23 words
A spool as set forth in claim 10, wherein said mechanism is axially adjustable to selectively move said rods axially of the shaft.
Claim 13
Dependent Claim
57 words
A spool as set forth in claim 11, wherein said shaft has a threaded section, said mechanism including an adjustable, threaded stop nut carried on said threaded section and operably engaging said rods to normally prevent axial movement thereof, said stop nut being advanceable on said threaded section to move said rods axially relative to the shaft.
Claim 14
Dependent Claim
37 words
A spool as set forth in claim 12, wherein said stop nut also operably engages said sleeve to axially move the same in unison with said rods upon advancement of the stop nut on said threaded section.
Claim 15
Dependent Claim
23 words
A spool as set forth in claim 1, wherein said means for axially shifting said sleeve includes drive means carried by said shaft.
Claim 16
Dependent Claim
63 words
A spool as set forth in claim 14, wherein said drive means is in threaded engagement with said sleeve and rotatably carried by said shaft, there being means for securing said drive means to said shaft to prevent axial movement thereof while allowing rotation of the same relative to the shaft, and means for preventing rotation of said sleeve relative to the shaft.
Claim 17
Dependent Claim
26 words
A spool as set forth in claim 15, wherein said drive means includes a rotatable collar surrounding said shaft and in threaded engagement with said sleeve.
Claim 18
Dependent Claim
68 words
A spool as set forth in claim 16, wherein said shaft has a threaded section thereon, said means for securinG said drive means to the shaft including a threaded stop nut abutting said collar and carried on said threaded section, said collar abutting said rods whereby advancement of said stop nut on said threaded section moves said sleeve and said rods in unison axially relative to the shaft.
Claim 19
Dependent Claim
39 words
A spool as set forth in claim 16, wherein said means for securing said drive means to the shaft comprises stationary, spaced shoulders on said shaft located to contact said collar and permit rotation thereof relative to the shaft.
Claim 20
Dependent Claim
86 words
An expandable spool comprising: an elongated shaft; a plurality of elongated rods positioned in circumferentially spaced relationship about said shaft; an axially shiftable sleeve positioned between said shaft and rods, said sleeve being operable upon axial shifting thereof to engage said rods to effect simultaneous radial movement of the latter with respect to said shaft; mechanism interconnecting said shaft and rods permitting selective axial movement of the latter with respect to said shaft; and means for axially shifting said sleeve to thereby radially move said rods.
Claim 21
Dependent Claim
86 words
An expandable spool comprising: an elongated shaft; a plurality of elongated rods positioned in circumferentially spaced relationship about said shaft; an axially shiftable sleeve positioned between said shaft and rods, said sleeve being operable upon axial shifting thereof to engage said rods to effect simultaneous radial movement of the latter with respect to said shaft; mechanism interconnecting said shaft and rods permitting selective axial movement of the latter with respect to said shaft; and means for axially shifting said sleeve to thereby radially move said rods.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-07-15 | 1978-01-14 | 1978-07-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-07-15 | 1982-01-14 | 1982-07-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-07-15 | 1986-01-14 | 1986-07-16 | $7700.00 | Window Closed / Lapsed |