Patent US3552672A successfully refreshed from Google Patents.
US3552672A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Roll spindle
Assignee: AERO SHAFT AB
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Filing: 1969-02-25
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Granted: 1971-01-05
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Expires: 1989-02-25
Abstract
Abstract A drive spindle for gripping the winding sleeve for paper rolls by means of inflatable hoses arranged in notches in the spindle surface. When inflated, these hoses displace pressing elements preferably in the shape of profiled rails outwards into gripping engagement with the winding sleeve which is thereby held firmly in contact with the spindle, and in the deflated state of the hoses, the sleeve can be easily removed from the spindle without any risk of damages to either the spindle or the sleeve. The engagement between the spindle and the sleeve is further enhanced by rails disposed on the spindle surface and cooperating with the pressing elements.
Inventors
- 👤 Karl Einar Lage Grettve
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 14:48
CPC Classifications
B; B65; B65H; B65H75/00; B65H75/02; B65H75/18; B65H75/24; B65H75/242; B65H75/243; B65H75/2437
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
177 words
An improved roll spindle for gripping winding sleeves for paper rolls 27 and the like, comprising expanding means in the form of hoses 15, said hoses 15 being inserted in longitudinal notches 2 formed in the spindle for displacing, when inflated, in a direction radially outwards, a pressing element 8 in the shape of a rod, each such pressing element being inserted in each notch, in such a manner that the radially outer border of the element, serving as a catching border against the inner surface of the winding sleeve 27, will extend outside the periphery of the spinDle, the improvement comprising a profiled tube 1 in which notches 2 are disposed, said notches having outwardly diverging sidewalls 3 longitudinally extending rails 6 of sheet metal the cross-sectional shape of which is substantially that of an arc of a circle, longitudinally extending beads 5 formed in the tube 1 between the notches 2 said rails 6 being attached to said beads 5 the longer side of said rails 6 serving as guides for the pressing elements 8.
Claim 2
Dependent Claim
177 words
An improved roll spindle for gripping winding sleeves for paper rolls 27 and the like, comprising expanding means in the form of hoses 15, said hoses 15 being inserted in longitudinal notches 2 formed in the spindle for displacing, when inflated, in a direction radially outwards, a pressing element 8 in the shape of a rod, each such pressing element being inserted in each notch, in such a manner that the radially outer border of the element, serving as a catching border against the inner surface of the winding sleeve 27, will extend outside the periphery of the spinDle, the improvement comprising a profiled tube 1 in which notches 2 are disposed, said notches having outwardly diverging sidewalls 3 longitudinally extending rails 6 of sheet metal the cross-sectional shape of which is substantially that of an arc of a circle, longitudinally extending beads 5 formed in the tube 1 between the notches 2 said rails 6 being attached to said beads 5 the longer side of said rails 6 serving as guides for the pressing elements 8.
Claim 3
Dependent Claim
24 words
A roll spindle as claimed in claim 1, wherein an axial stiffening tube 32 is attached to the bottom 4 of the notches 2.
Claim 4
Dependent Claim
22 words
An improved roll spindle as claimed in claim 1, wherein the pressing elements 8 consist of profiled rails of T-shaped cross section.
Claim 5
Dependent Claim
36 words
A roll spindle as claimed in claim 3, wherein the legs (10) of the cross stem of the T are arranged in such a way that said legs enclose an obtuse angle 11 with each other.
Claim 6
Dependent Claim
33 words
An improved roll spindle as claimed in claim 1, wherein the pressing elements 8'''' consist of profiled rails of U-shaped cross section, the legs 34,35 of the U being directed radially outward. T-shaped
Claim 7
Dependent Claim
20 words
An improved roll spindle as claimed in claim 5, wherein the legs 34,35 of the U extend alternatively radially outwards.
Claim 8
Dependent Claim
21 words
An improved roll spindle as claimed in claim 5, wherein the legs 34, 35 of the U extend alternatively radially outwards.
Claim 9
Dependent Claim
74 words
An improved roll spindle as claimed in claim 1, wherein the hoses 15 are closed at one end, preferably by means of a vulcanization process, and provided at their opposite end with an end piece 17, said end piece presenting a connection plug 18 to be inserted in a radial bore 19 said bore 19 extending in a trunnion 12 of the spindle, an O-ring 20 sealing off said bore from the bore wall.
Claim 10
Dependent Claim
74 words
An improved roll spindle as claimed in claim 1, wherein the hoses 15 are closed at one end, preferably by means of a vulcanization process, and provided at their opposite end with an end piece 17, said end piece presenting a connection plug 18 to be inserted in a radial bore 19 said bore 19 extending in a trunnion 12 of the spindle, an O-ring 20 sealing off said bore from the bore wall.
References Cited (Backward Citations)
US3048345A
Cited
US3273817A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-01-04 | 1974-07-06 | 1975-01-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-04 | 1978-07-06 | 1979-01-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-04 | 1982-07-06 | 1983-01-05 | $7700.00 | Window Closed / Lapsed |