US3801089A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Automatic vertical band sawing machine provided with mechanism to attenuate the resonance between the sawing blade and the work table
Assignee: Individual
•
Filing: 1972-03-17
•
Granted: 1974-04-02
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Expires: 1992-03-17
Abstract
Abstract This invention relates to the improved technology of a vertical band sawing machine and in particular to vertical band sawing machine capable of inclining and/or setting the work table in relation with the sawing blade universally (i.e. both longitudinally and/or transversely) which comprises providing said machine with the work table including mechanism for free backward travelling by means of a suitable tracking mechanism, mechanism for free transverse traveling and mechanism for free turning in a suitable manner, enabling it to cut the workpiece automatically on the work table along the prescribed model curve by turning the work table by means of said free turning mechanism both clockwise and counterclockwise according to the conrol signal from the mechanism to detect said model curve, and further incorporating mechanism to attenuate the resonance of the work table with the band sawing blade caused by the elastic band sawing blade and the aforesaid free transverse travelling mechanism during the curve-cutting.
Inventors
- 👤 C Tamura
- 👤 H Majima
- 👤 G Fukugami
- 👤 H Takahashi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 21:57
CPC Classifications
B; B27; B27B; B27B13/00; B27B13/16; B23; B23D; B23D55/00; B23D55/005; B27B25/00; Y; Y10; Y10T; Y10T83/00; Y10T83/141; Y10T83/148; Y10T83/647; Y10T83/654; Y10T83/6545; Y10T83/6547; Y10T83/6548; Y10T83/707; Y10T83/7101; Y10T83/7114; Y10T83/712; Y10T83/7195; Y10T83/7201; Y10T83/7264; Y10T83/929; Y10T83/9457
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
214 words
A band sawing machine comprising a housing, a band saw unit operatively mounted in said housing, means for driving the band saw, a work table for supporting work to be cut, means for mounting said table whereby the table may be tilted in any direction and whereby the table may be moved longitudinally and/or transversely of said band saw, said mounting means also including means whereby said work table may be rotated about an axis normal to its plane, means for tracking a cutting curve on a workpiece positioned on said table as said band saw cuts through said workpiece along said cutting curve, power means for rotating the work table about its said axis, means actuated by said tracking means for initiating operation of said power means to rotate said work table to a position so that said band saw will be generally directed along said cutting curve, and means attached to the non-rotatable part of said work table to attenuate the resonance of the work table with the band saw in the transverse direction across the cutting track of said band saw blade whereby the path of said band saw along said cutting curve will be more accurately aligned therewith than would be the case in the absence of said attenuating means.
Claim 2
Dependent Claim
214 words
A band sawing machine comprising a housing, a band saw unit operatively mounted in said housing, means for driving the band saw, a work table for supporting work to be cut, means for mounting said table whereby the table may be tilted in any direction and whereby the table may be moved longitudinally and/or transversely of said band saw, said mounting means also including means whereby said work table may be rotated about an axis normal to its plane, means for tracking a cutting curve on a workpiece positioned on said table as said band saw cuts through said workpiece along said cutting curve, power means for rotating the work table about its said axis, means actuated by said tracking means for initiating operation of said power means to rotate said work table to a position so that said band saw will be generally directed along said cutting curve, and means attached to the non-rotatable part of said work table to attenuate the resonance of the work table with the band saw in the transverse direction across the cutting track of said band saw blade whereby the path of said band saw along said cutting curve will be more accurately aligned therewith than would be the case in the absence of said attenuating means.
Claim 3
Dependent Claim
77 words
The construction set forth in claim 2, said mounting means for said work table comprising a first member pivoted to said housing, a second member pivoted to said first member, a third member slidable in one direction on said second member, a fourth member slidable on said third member in a direction at right angles to the direction of sliding movement of said third member, and a fifth member carried by and rotatable on said fourth member.
Claim 4
Dependent Claim
28 words
The construction set forth in claim 2, said means for causing attenuation of said resonance being a rotating drive for vibrating said work table in said transverse direction.
Claim 5
Dependent Claim
36 words
Apparatus according to claim 4 and including means for generating pulsating control signals for controlling said vibration, said signals providing a deviation correcting pulse driving force followed by a pulse driving force in the opposite direction.
Claim 6
Dependent Claim
82 words
In a band saw having a universally movable work table and means for vibrating said work table transverse to the cutting track of the band saw blade, control means for said vibrating means comprising limit means for sensing deviation of said blade relative to a controlled cut line, means for applying pulsating control signals to said vibrating means opposed to said deviation and means for applying an opposite pulsating control signal a predetermined time after application of said deviation opposed control signal.
Claim 7
Dependent Claim
82 words
In a band saw having a universally movable work table and means for vibrating said work table transverse to the cutting track of the band saw blade, control means for said vibrating means comprising limit means for sensing deviation of said blade relative to a controlled cut line, means for applying pulsating control signals to said vibrating means opposed to said deviation and means for applying an opposite pulsating control signal a predetermined time after application of said deviation opposed control signal.
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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) | 1977-04-01 | 1977-10-01 | 1978-04-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-04-01 | 1981-10-01 | 1982-04-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-04-01 | 1985-10-01 | 1986-04-02 | $7700.00 | Window Closed / Lapsed |