US3838829A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for centering rolls of convoluted strip material in photographic copying machines or the like
Assignee: Agfa Gevaert AG
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Filing: 1973-05-04
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Granted: 1974-10-01
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Expires: 1993-05-04
Abstract
Abstract A device for centering rolls of convoluted strips in photographic copying machines has two shafts of identical length which, when placed end-to-end, are insertable from above into a chamber provided in a bearing structure. Each shaft has an outer stop and an inner stop and each shaft carries an annular insert which is movable axially between the corresponding stops. The inserts have hubs which are insertable into the ends of the core for a roll of convoluted strip material and flanges which abut against the respective ends of the core in response to complete insertion of the hubs. The inserts abut against the outer stops when their flanges abut against the ends of a core having a greater length and against the inner stops when their flanges abut against the ends of a core having a smaller length. Each insert further carries a spring-biased ball which can snap into a recess provided in the periphery of the associated shaft between the corresponding stops so that the inserts can center cores of an intermediate length.
Inventors
- 👤 C Gotze
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 22:27
CPC Classifications
B; B65; B65H; B65H75/00; B65H75/02; B65H75/04; B65H75/08; B65H16/00; B65H16/02; B65H16/06; G; G03; G03B; G03B27/00; G03B27/32; G03B27/52; G03B27/58; G03B27/587; G03B27/588; G03B2217/00; G03B2217/26; G03B2217/261
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
169 words
A device for centering tubular bodies of different axial lengths, particularly for centering rolls of convoluted strip material in photographic copying machines or the like, comprising a bearing having a chamber of predetermined length; a pair of discrete shafts each having spaced-apart inner and outer stops, the combined length of said shafts being substantially equal to said predetermined length so that said shafts are insertable into said chamber when placed end-to-end; and an annular insert axially movably mounted on each of said shafts between the respective stops, said inserts having hubs insertable into a tubular body from opposite ends thereof and flanges which abut against the respective ends of the tubular body in inserted positions of said hubs, said inserts abutting against the corresponding inner stops when said hubs are inserted into a tubular body of a first length and against the corresponding outer stops when said hubs are inserted into a tubular body of a greater second length and while said shafts are located end-toend in said chamber.
Claim 2
Independent Claim
169 words
A device for centering tubular bodies of different axial lengths, particularly for centering rolls of convoluted strip material in photographic copying machines or the like, comprising a bearing having a chamber of predetermined length; a pair of discrete shafts each having spaced-apart inner and outer stops, the combined length of said shafts being substantially equal to said predetermined length so that said shafts are insertable into said chamber when placed end-to-end; and an annular insert axially movably mounted on each of said shafts between the respective stops, said inserts having hubs insertable into a tubular body from opposite ends thereof and flanges which abut against the respective ends of the tubular body in inserted positions of said hubs, said inserts abutting against the corresponding inner stops when said hubs are inserted into a tubular body of a first length and against the corresponding outer stops when said hubs are inserted into a tubular body of a greater second length and while said shafts are located end-toend in said chamber.
Claim 3
Dependent Claim
63 words
A device as defined in claim 1, wherein the length of each of said shafts is one-half said predetermined length, said stops on one of said shafts being mirror symmetrical to said stops on the other of said shafts with reference to a plane normal to the axes of and extending between said shafts when said shafts are located in said chamber end-to-end.
Claim 4
Dependent Claim
26 words
A device as defined in claim 1, wherein said bearing has an open side through which said shafts are insertable into and removable from said chamber.
Claim 5
Dependent Claim
36 words
A device as defined in claim 3, wherein said bearing has mutually inclined surfaces flanking said open side and converging toward said chamber to guide the outer ends of said shafts during insertion into said chamber.
Claim 6
Dependent Claim
19 words
A device as defined in claim 3, wherein said open side is located at a level above said chamber.
Claim 7
Dependent Claim
33 words
A device as defined in claim 1 for centering tubular bodies having axial holes of a predetermined diameter, wherein the outer diameter of each of said hubs is less than said predetermined diameter.
Claim 8
Dependent Claim
34 words
A device as defined in claim 6, wherein each of said hubs comprises at least one radially outwardly extending projection arranged to engage the internal surface of a tubular body which receives said hubs.
Claim 9
Dependent Claim
38 words
A device as defined in claim 7, wherein each of said projections is an axially parallel rib whose width, as considered in the radial direction of the respective hub, diminishes in a direction away from the respective flange.
Claim 10
Dependent Claim
19 words
A device as defined in claim 1, wherein said bearing comprises supporting surfaces for the flanges of said inserts.
Claim 11
Dependent Claim
35 words
A device as defined in claim 1, further comprising detent means provided on said shafts and said inserts for releasably holding each of said inserts in at least one intermediate position between the respective stops.
Claim 12
Dependent Claim
56 words
A device as defined in claim 10, wherein each of said detent means comprises at least one recess provided in the periphery of the corresponding shaft between the respective stops and a spring-biased member radially movably received in the corresponding insert and arranged to snap into said recess in said intermediate position of said corresponding insert.
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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) | 1977-09-30 | 1978-04-01 | 1978-10-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-09-30 | 1982-04-01 | 1982-10-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-09-30 | 1986-04-01 | 1986-10-01 | $7700.00 | Window Closed / Lapsed |