Patent US3834642A successfully refreshed from Google Patents.
US3834642A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for winding tapes and films
Assignee: Erwin Kampf GmbH and Co Maschinenfabrik
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Filing: 1973-03-06
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Granted: 1974-09-10
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Expires: 1993-03-06
Abstract
Abstract An apparatus for winding tapes and films where the support for the roll is lineally or pivotally displaced in response to the change in roll diameter which is sensed by electrical control means, and where a contact roller is applied against the roll with an adjustable predetermined pressure. The bearing for the contact roller is arranged to yield in response to the tape tension, the measurement of its displacement giving a continuous reading of the latter.
Inventors
- 👤 E Kampf
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 21:22
CPC Classifications
B; B65; B65H; B65H18/00; B65H18/08; B65H18/26; B65H2301/00; B65H2301/40; B65H2301/41; B65H2301/414; B65H2301/4148; B65H2403/00; B65H2403/50; B65H2403/52; B65H2404/00; B65H2404/40; B65H2404/43
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
291 words
An apparatus for winding tape and similar flexible film or web material onto a roll, comprising in combination: a frame serving as a stationary structural support; a beam connected to the frame, the beam carrying two spaced, aligned bearings; a contact roller journalled in the bearings of the beam; a winding roll assembly, including a winding roll in parallel alignment with the contact roller, a drive means, and a winding roll support in which the roll is journalled; means for guidedly moving the contact roller and the winding roll relative to one another along a line which substantially coincides with an alignment plane which is defined by their axes; means for maintaining a contact pressure between the contact roller and the winding roll at different diameters of the latter; said beam being connected to the frame by means of a pivot whose axis is spaced from and parallel to the axis of the two contact roller bearings; said means for maintaining contact pressure engaging the pivotable beam so as to urge the contact roller toward the periphery of the winding roll in a direction which is substantially perpendicular to a beam plane which is defined as including the axis of the aforementioned bearings and the axis of the beam pivot; and tape tension measuring means including support means on said beam for the contact rolleR bearings, mounting the same to resiliently yield in the direction toward and from said beam pivot in response to changes in the tape tension, and arranged to yield no more than at most a negligible amount in response to the contact pressure; the yield displacement thus being a measure of only that portion of the contact roller bearing load which is due to the tape tension.
Claim 2
Independent Claim
291 words
An apparatus for winding tape and similar flexible film or web material onto a roll, comprising in combination: a frame serving as a stationary structural support; a beam connected to the frame, the beam carrying two spaced, aligned bearings; a contact roller journalled in the bearings of the beam; a winding roll assembly, including a winding roll in parallel alignment with the contact roller, a drive means, and a winding roll support in which the roll is journalled; means for guidedly moving the contact roller and the winding roll relative to one another along a line which substantially coincides with an alignment plane which is defined by their axes; means for maintaining a contact pressure between the contact roller and the winding roll at different diameters of the latter; said beam being connected to the frame by means of a pivot whose axis is spaced from and parallel to the axis of the two contact roller bearings; said means for maintaining contact pressure engaging the pivotable beam so as to urge the contact roller toward the periphery of the winding roll in a direction which is substantially perpendicular to a beam plane which is defined as including the axis of the aforementioned bearings and the axis of the beam pivot; and tape tension measuring means including support means on said beam for the contact rolleR bearings, mounting the same to resiliently yield in the direction toward and from said beam pivot in response to changes in the tape tension, and arranged to yield no more than at most a negligible amount in response to the contact pressure; the yield displacement thus being a measure of only that portion of the contact roller bearing load which is due to the tape tension.
Claim 3
Dependent Claim
52 words
An apparatus as defined in claim 1, wherein: the contact roller and the winding roll are positioned in relation to the direction of tape arrival that the angle defined by the arc of contact between the tape and the contact roller is divided into substantially equal halves by the aforementioned beam plane.
Claim 4
Dependent Claim
32 words
An apparatus as defined in claim 2, wherein: the arc of contact between the tape and the contact roller lies within an angular range of 160* and 200* and is preferably 180*.
Claim 5
Dependent Claim
54 words
An apparatus as defined in claim 1, wherein: the beam which carries the bearings for the contact rollers includes a support arm for each bearing, each support arm including means for restricting the yielding motion of the bearing to the beam plane and for biasing the bearing against the effect of the tape tension.
Claim 6
Dependent Claim
80 words
An apparatus as defined in claim 4, wherein: each support arm has a forked end portion with two parallel legs, the contact roller bearings forming part of bearing blocks positioned between the parallel legs; and the restricting and biasing means are in the form of spaced, parallel leaf springs which hold the bearing blocks between them, the leaf spring being arranged perpendicular to the beam plane so as to yield only in the direction toward and from the beam pivot.
Claim 7
Dependent Claim
33 words
An apparatus as defined in claim 5, wherein: the measuring means includes a displacement measuring device which transduces the deflection of the leaf springs into a control signal for the winding roll drive.
Claim 8
Dependent Claim
45 words
An apparatus as defined in claim 1, wherein: the means for guidedly moving the contact roller and winding roll relative to one another includes a means for retracting the winding roll support away from the contact roller along a straight line within the alignment plane.
Claim 9
Dependent Claim
60 words
An apparatus as defined in claim 1, wherein: the means for guidedly moving the contact roller and winding roll relative to one another includes a means for retracting the winding roll support away from the contact roller along an arc around a distant pivot point, the arc being limited by an acute angle and aligned substantially with the alignment plane.
Claim 10
Dependent Claim
82 words
An apparatus as defined in claim 7, wherein: the winding roll support is in the form of a carriage; and the retracting means includes: a carriage guide on the frame in parallel alignment with the approach plane; a carriage drive; and means for operating the carriage drive in response to the pivotal position to which the beam is moved by the growing diameter of the winding roll on the one hand, and by the retraction of the carriage on the other hand.
Claim 11
Dependent Claim
55 words
An apparatus as defined in claim 9, further comprising: a means for continuously measuring the winding roll diameter as a response to the increase in distance between the contact roller axis and the winding roll axis; the diameter measuring means being responsive to the increase to produce a control signal for the winding roll drive.
Claim 12
Dependent Claim
57 words
An apparatus as defined in claim 10, wherein: the diameter measuring means includes a differential drive connection which responds to the winding roll axis motion and to the contact roller axis motion whereby their displacements in the same sense are substracted from one another, while their displacements away from each other are added in the signal produced.
Claim 13
Dependent Claim
109 words
An apparatus as defined in claim 11, wherein: the differential drive connection includes: a reference chain extending in a closed, elongated loop parallel to the plane of movement of said contact roller and winding roll axes and with two statIonary guide rollers; a connection between one chain strand and the pivotable beam at a point on the beam which is equally and oppositely spaced from its bearing axis relative to the beam pivot center; and a sprocket journalled on the carriage and engaging the other chain strand, the rotational position of the sprocket being an indication of the distance between the winding roll axis and the contact roller axis.
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) | 1977-09-09 | 1978-03-11 | 1978-09-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-09-09 | 1982-03-11 | 1982-09-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-09-09 | 1986-03-11 | 1986-09-10 | $7700.00 | Window Closed / Lapsed |