US3890862A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for shearing the edges of a sheet of metal
Assignee: Creusot Loire SA
•
Filing: 1973-10-03
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Granted: 1975-06-24
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Expires: 1993-10-03
Abstract
Abstract A method of and apparatus for shearing the edges of a sheet of metal in which a sheet is positioned with its longitudinal axis effectively parallel to the cutting line of shears, the sheet is moved towards the cutting line, that edge of the sheet adjacent the shears is cut, the sheet is rotated through 180* about an axis parallel to the cutting line and the other edge of the sheet is moved towards and cut by the shears, wherein the sheet is initially positioned relative to the shears in dependence on the deviation of the edges to be cut from linearity, the deviations being calculated using detectors which detect the positions of the edges adjacent and remote from the cutting line as the sheet is moved towards the shears.
Inventors
- 👤 Bernard Lhenry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 16:52
CPC Classifications
B; B21; B21D; B21D43/00; B21D43/28; B21D43/287; B23; B23D; B23D31/00; B23D31/04; B23D33/00; B23D33/10; Y; Y10; Y10T; Y10T83/00; Y10T83/04; Y10T83/0505; Y10T83/051; Y10T83/141; Y10T83/145; Y10T83/162; Y10T83/173; Y10T83/175; Y10T83/178; Y10T83/525; Y10T83/531; Y10T83/536; Y10T83/647; Y10T83/654; Y10T83/6545; Y10T83/6579
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
177 words
Apparatus for shearing the edges of a sheet comprising: an edge shearer, a table adjacent the shearer for supporting a sheet, at least one carriage guided for movement in a direction perpendicular to the cutting line, means for gripping an edge of a sheet, the gripping means being mounted at an extremity of at least one carriage on that side adjacent the shears, motor driving means for linear displacement of each carriage in opposite senses, means for rotating a sheet adjacent the shears, after cutting a first edge of a sheet, detectors for detecting the passage of the edge of a sheet adjacent the cutting line, each situated at an equal direction from the cutting line in the direction of displacement of a carriage, detectors mounted at the end nearest to the shears of each carriage operably by the edge of a sheet remote from the cutting line for controlling the advance of the carriage in relation to the said edge, position coders for controlling position of each carriage, and means for controlling operation of the apparatus.
Claim 2
Dependent Claim
177 words
Apparatus for shearing the edges of a sheet comprising: an edge shearer, a table adjacent the shearer for supporting a sheet, at least one carriage guided for movement in a direction perpendicular to the cutting line, means for gripping an edge of a sheet, the gripping means being mounted at an extremity of at least one carriage on that side adjacent the shears, motor driving means for linear displacement of each carriage in opposite senses, means for rotating a sheet adjacent the shears, after cutting a first edge of a sheet, detectors for detecting the passage of the edge of a sheet adjacent the cutting line, each situated at an equal direction from the cutting line in the direction of displacement of a carriage, detectors mounted at the end nearest to the shears of each carriage operably by the edge of a sheet remote from the cutting line for controlling the advance of the carriage in relation to the said edge, position coders for controlling position of each carriage, and means for controlling operation of the apparatus.
Claim 3
Dependent Claim
36 words
Apparatus in accordance with claim 1, wherein the rotating means comprises a plurality of horizontal arms fixed to a member which is vertically movable and each provided at its extremity with a pivotable sheet gripping means.
Claim 4
Dependent Claim
55 words
Apparatus in accordance with claim 1, wherein the table comprises roller elements for displacement of the sheet perpendicularly to the cutting line, motor means for vertical moving of said roller elements between a low position under the table and a raised position above the table, and motor means for vertical moving of said gripping means.
Claim 5
Dependent Claim
52 words
Apparatus in accordance with claim 3, wherein the table comprises roller elements for displacement of the sheet in a direction parallel to the cutting line, motor drivIng means for said roller elements, and means to control said motor driving means as a function of the position of the sheet in said direction.
Claim 6
Dependent Claim
67 words
Apparatus in accordance with claim 3, comprising: a sequential automated control for the driving means of the table, the shears, the rotating arrangement, and a numerical control unit, a numerical control unit for positioning each carriage as a function of the signals from at least one coder and of the final width of the sheet and for causing the change of sequence of the sequential automated control.
Claim 7
Dependent Claim
34 words
Apparatus in accordance with claim 1, comprising: a numerical control unit for positioning each carriage as a function of the signals from at least one coder and of the final width of the sheet.
Claim 8
Dependent Claim
62 words
Apparatus in accordance with claim 1, comprising: a sequential automated control for the shears, the sheet rotating means, and a numerical control unit, a numerical control unit for positioning each carriage as a function of the signals from at least one coder and of the final width of the sheet and for causing a change of sequence of the sequential automated control.
Claim 9
Dependent Claim
55 words
Apparatus in acordance with claim 7, wherein the numerical control unit comprises means for calculating at least a value of the departure from linearity of the edge of the sheet adjacent the cutting line and at least a value of the departure from linearityy of the edge of the sheet remote from the cutting line.
Claim 10
Dependent Claim
29 words
Apparatus in accordance with claim 7, wherein the sequential automated control comprises means for selecting the number of gripping means in operation according to the length of the sheet.
Claim 11
Dependent Claim
53 words
Apparatus in accordance with claim 9, wherein the sequential automated control comprises means for driving the advanced of the two extreme carriages selected and for driving the gripping means of the said carriages and means for driving the advance of each intermediate carriage as far as the edge, remote from the cutting line.
Claim 12
Dependent Claim
56 words
Apparatus in accordance with claim 9, wherein the numerical control unit comprises means to calculate the width at each extremity of the sheet as a function of the signal of each extreme coder when a signal is given by an extreme detector for detecting the passage of the edge of a sheet adjacent the cutting line.
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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) | 1978-06-23 | 1978-12-23 | 1979-06-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-06-23 | 1982-12-23 | 1983-06-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-06-23 | 1986-12-23 | 1987-06-24 | $7700.00 | Window Closed / Lapsed |