US4564418A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Paper converting machine vacuum cylinder
Assignee: Winkler and Duennebier Maschinefabrik und Eisengiesserei GmbH
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Filing: 1985-01-28
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Granted: 1986-01-14
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Expires: 2005-01-28
Abstract
Abstract A noise suppression device is provided for a vacuum cylinder having a conl head which is used in high speed paper converting machines and which includes a sound attenuator which is integral with the vacuum cylinder. The sound attenuator incorporates a plurality of attenuation chambers within the vacuum cylinder which are interconnected by tubes arranged in an offset manner to overlap each other in the projection. Air passages are also provided in the side of the vacuum cylinder opposite the control head to connect the last attenuation chamber to the atmosphere.
Inventors
- 👤 Martin Blumle
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 11:10
CPC Classifications
B; B65; B65H; B65H3/00; B65H3/08; B65H3/10
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
144 words
In a high speed paper converting machine vacuum cylinder wherein a control head is attached at its control surface directly to the end face of a vacuum cylinder or inserted into the vacuum cylinder with an accurate fit and the canal for atmospheric pressure equalization is open on the control surface of the control head toward the interior of the vacuum cylinder, the improvement comprising: the interior of said vacuum cylinder being subdivided as a reflection sound attenuator into a plurality of annular attenuation chambers interconnected by offset tubes which overlap each other in the projection, and openings in the side of the vacuum cylinder opposite the control head connecting the last attenuation chamber to the atmosphere, so as to suppress the noise resulting from the fresh air inflow during atmospheric pressure equalization at the completion of the vacuum cycle of the vacuum cylinder.
Claim 2
Dependent Claim
144 words
In a high speed paper converting machine vacuum cylinder wherein a control head is attached at its control surface directly to the end face of a vacuum cylinder or inserted into the vacuum cylinder with an accurate fit and the canal for atmospheric pressure equalization is open on the control surface of the control head toward the interior of the vacuum cylinder, the improvement comprising: the interior of said vacuum cylinder being subdivided as a reflection sound attenuator into a plurality of annular attenuation chambers interconnected by offset tubes which overlap each other in the projection, and openings in the side of the vacuum cylinder opposite the control head connecting the last attenuation chamber to the atmosphere, so as to suppress the noise resulting from the fresh air inflow during atmospheric pressure equalization at the completion of the vacuum cycle of the vacuum cylinder.
Claim 3
Dependent Claim
27 words
The high speed paper converting machine vacuum cylinder as defined in claim 1, which further comprises sound absorption material covering the interior surfaces of said vacuum cylinder.
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) | 1989-01-13 | 1989-07-15 | 1990-01-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-01-13 | 1993-07-15 | 1994-01-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-01-13 | 1997-07-15 | 1998-01-14 | $7700.00 | Window Closed / Lapsed |