US3852847A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for manufacturing tampons
Assignee: Dr Carl Hahn KG
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Filing: 1972-04-07
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Granted: 1974-12-10
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Expires: 1992-04-07
Abstract
Abstract Apparatus for the production of a tampon by rolling up a wadding pad upon a rotary mandrel includes a mandrel, means forming a knotted loop of draw thread loosely around the wadding before the latter is rolled up on the mandrel, a sleeve mounted for coaxial movement over part of the mandrel but nonrotatable therewith, means for axially reciprocating the sleeve, thread guiding means carried by the mandrel and by the sleeve being shaped to intercept and direct the knotted ends of the draw thread internally of the sleeve while the mandrel is rotated and while the sleeve is axially displaced into one end of the pad being rolled up, whereby the drawn thread is wound into a flat spiral winding seated in the annular recess formed by the displacement of the sleeve into the end of the rolled pad.
Inventors
- 👤 H Etz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 23:10
CPC Classifications
A; A61; A61F; A61F13/00; A61F13/15; A61F13/20; A61F13/2082; A61F13/2085
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
207 words
Apparatus for the production of a tampon by rolling up a wadding pad upon a rotary mandrel comprising means for slinging a draw thread with clearance around a wadding pad positioned on a rotary mandrel and means for forming a knotted loop having a free end from said draw thread before the wadding pad is rolled up on the mandrel, means for rotating said mandrel, a sleeve mounted for coaxial movement about the mandrel but non-rotatable with respect to the mandrel, means for axially reciprocating said sleeve, a first thread guide means carried by said mandrel and a second thread guide means carried by the coaxial sleeve, said first guide means for guiding the thread as it is slung around said mandrel and said wadding, said second thread guiding means carried by the sleeve having means to intercept and direct the free end of the draw thread internally of said sleeve while the mandrel is rotated and while the sleeve is displaced axially by the reciprocating means into one end of the pad being rolled up, whereby the draw thread is wound into a flat spiral spool seated in recess annular recessed formed by said displacement of said sleeve into the end of the rolled up pad.
Claim 2
Dependent Claim
207 words
Apparatus for the production of a tampon by rolling up a wadding pad upon a rotary mandrel comprising means for slinging a draw thread with clearance around a wadding pad positioned on a rotary mandrel and means for forming a knotted loop having a free end from said draw thread before the wadding pad is rolled up on the mandrel, means for rotating said mandrel, a sleeve mounted for coaxial movement about the mandrel but non-rotatable with respect to the mandrel, means for axially reciprocating said sleeve, a first thread guide means carried by said mandrel and a second thread guide means carried by the coaxial sleeve, said first guide means for guiding the thread as it is slung around said mandrel and said wadding, said second thread guiding means carried by the sleeve having means to intercept and direct the free end of the draw thread internally of said sleeve while the mandrel is rotated and while the sleeve is displaced axially by the reciprocating means into one end of the pad being rolled up, whereby the draw thread is wound into a flat spiral spool seated in recess annular recessed formed by said displacement of said sleeve into the end of the rolled up pad.
Claim 3
Dependent Claim
39 words
Apparatus according to claim 1, wherein said sleeve has an end facing the pad of said wadding and includes an annular collar bounded radially outward by a shoulder, a guide cam for the draw thread tangentially abutting said shoulder.
Claim 4
Dependent Claim
17 words
Apparatus according to claim 2, wherein the sleeve tapers conically towards its free end surrounding the mandrel.
Claim 5
Dependent Claim
42 words
Apparatus according to claim 2, wherein the width of the guide cam located in the sleeve for winding the draw thread is smaller than that of the annular shoulder so that said annular shoulder radially bounds the guide cam on the inside.
Claim 6
Dependent Claim
46 words
Apparatus according to claim 2, wherein the guide cam extends over a circumferential angle of about 90* of the sleeve and with the annular collar, merge into a common surface extending substantiaLly horizontal and parallel with the longitudinal axis towards the end remote from the mandrel.
Claim 7
Dependent Claim
25 words
Apparatus according to claim 2, wherein the end of the sleeve facing the winding mandrel includes a slotted pusher ring releasably secured to the sleeve.
Claim 8
Dependent Claim
26 words
Apparatus according to claim 1, which further comprises means for reciprocating said mandrel, a common driving means for driving said respective reciprocating means in timed relation.
Claim 9
Dependent Claim
68 words
Apparatus according to claim 7 wherein said winding mandrel comprises a shaft carrying a gear sleeve, a rack gear engaging said gear sleeve, a double armed lever, one arm of which engages a link lever, said link lever connected to said rack gear, the other arm of said double armed lever connected to a roller, means for rocking said double armed lever including cam means engaging said roller.
Claim 10
Dependent Claim
80 words
Apparatus according to claim 1, wherein the winding mandrel comprises a fork having a longitudinal slot embracing each side of the wadding pad, the length of which slot is slightly less than the width of the wadding pad and the opening of the slot slightly larger than the thickness of the wadding pad, said thread guide means of said winding mandrel comprising two notches on the front end of said fork, which notches are aligned transversely to the mandrel axis.
References Cited (Backward Citations)
US2763899A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-12-09 | 1978-06-10 | 1978-12-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-12-09 | 1982-06-10 | 1982-12-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-12-09 | 1986-06-10 | 1986-12-10 | $7700.00 | Window Closed / Lapsed |