Patent US4099434A successfully refreshed from Google Patents.
US4099434A
Expired / Lapsed
US
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Sawing apparatus
Assignee: Alcan Research and Development Ltd
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Filing: 1977-02-15
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Granted: 1978-07-11
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Expires: 1997-02-15
Abstract
Abstract A sawing apparatus for sawing long lengths of material into shorter pieces having a predetermined length and discarding spoiled and short end pieces comprises a saw movable across a saw table formed in two parts which can be tilted independently of each other to tip sawn material into a receptacle. The downstream part has a nose piece projecting just beyond the saw to support the leading end of a length to be sawn. The apparatus also comprises exit and entry tables and a number of sensors for respectively detecting the leading and trailing ends of the lengths of material and for automatically initiating sequences of operations of releasable clamps for clamping the lengths of material, traversing movements of the saw, and the tiltable table parts.
Inventors
- 👤 Jean Pierre Hardouin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 14:51
CPC Classifications
B; B23; B23D; B23D47/00; B23D47/04; B23D47/06; Y; Y10; Y10T; Y10T83/00; Y10T83/202; Y10T83/2092; Y10T83/2198; Y10T83/525; Y10T83/531
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
120 words
Sawing apparatus comprising a saw, a saw table across which the saw can be traversed, and which includes first and second parts extending respectively on opposite sides of the line of movement of the saw, means for inclining each of said two parts independently of the other to tip material off that part, and a releasable clamp at the same side of said line of movement of the saw as said first saw table part for clamping the lengths of material against movement lengthwise of themselves, the said second saw table part having a nose portion which projects a short distance on said same side of the line of movement of the saw at the general level of the table.
Claim 2
Dependent Claim
120 words
Sawing apparatus comprising a saw, a saw table across which the saw can be traversed, and which includes first and second parts extending respectively on opposite sides of the line of movement of the saw, means for inclining each of said two parts independently of the other to tip material off that part, and a releasable clamp at the same side of said line of movement of the saw as said first saw table part for clamping the lengths of material against movement lengthwise of themselves, the said second saw table part having a nose portion which projects a short distance on said same side of the line of movement of the saw at the general level of the table.
Claim 3
Dependent Claim
202 words
Sawing apparatus as claimed in claim 1, wherein the saw table further comprises an entry table disposed upstream of and aligned with said first saw table part, an exit table disposed downstream of and aligned with said second saw table part, means for propelling parallel lengths of material in a downstream direction along the tables, a first sensor responsive to the arrival of the leading ends of said parallel lengths, said first-mentioned releasable clamp being arranged over the downstream end of the entry table for clamping the lengths of material against movement lengthwise of themselves, a second releasable clamp disposed close to the downstream side of the saw for clamping the lengths of material against movement lengthwise of themselves, the first sensor and the first clamp being a first predetermined distance downstream and upstream respectively of the saw, a stop disposed at a second predetermined distance downstream of the saw for abutment with the leading ends of the parallel lengths, and a second sensor disposed upstream of the saw at a third predetermined distance greater than the sum of the first and second predetermined distances and responsive to the presence of the trailing end of the longest of the lengths of material.
Claim 4
Dependent Claim
68 words
Sawing apparatus as claimed in claim 2, comprising a third sensor which is disposed upstream of the stop and which is adapted to be actuated by the presence of the leading ends of the lengths of material and when so actuated to cause the propelling means to slow and then stop the forward movement of the lengths such that the said leading ends abut the stop without rebounding.
Claim 5
Dependent Claim
29 words
Sawing apparatus as claimed in claim 1, wherein at least one of said parts of the saw table incorporates driving means for driving material thereon in a downstream direction.
Claim 6
Dependent Claim
29 words
Sawing apparatus as claimed in claim 1, wherein the two said parts of the saw table are pivotable by their edges further from each other about respective horizontal axes.
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) | 1981-07-10 | 1982-01-09 | 1982-07-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-07-10 | 1986-01-09 | 1986-07-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-07-10 | 1990-01-09 | 1990-07-11 | $7700.00 | Window Closed / Lapsed |