US3750512A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cutting machine
Assignee: Cumberland Engineering Corp
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Filing: 1972-04-26
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Granted: 1973-08-07
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Expires: 1992-04-26
Abstract
Abstract A restraining and hold-down apparatus for use in conjunction with a machine (for cutting thin sheet material) having a feed table, cutting means located at the inner end of the table, and top and bottom feed rolls at the outer end of the table, comprising a main plate hinged at the outer end of the feed table and resiliently held in proximity to the feed table, a pressure pad attached to the inner end of the plate and adjacent the cutting means, the pad being resiliently biased toward the table, and resilient means for biasing the top feed roll toward the bottom feed roll and biasing the rear end of the main plate toward the table simultaneously with the top roll.
Inventors
- 👤 S Gotham
- 👤 G Thurber
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 20:19
CPC Classifications
B; B26; B26D; B26D1/00; B26D1/01; B26D1/12; B26D1/25; B26D1/34; B26D1/38; Y; Y10; Y10S; Y10S83/00; Y10S83/906; Y10T; Y10T83/00; Y10T83/485; Y10T83/494; Y10T83/501; Y10T83/727; Y10T83/741; Y10T83/743; Y10T83/747; Y10T83/95
Claims Analysis
Total Claims: 27
Claim 1
Independent Claim
254 words
In a machine for cutting sheet material which includes a feed table, cutting means at the inner end of the feed table, and top and bottom feed rolls at the outer end of the feed table for feeding said material along the feed table toward the cutting means, that improvement which comprises a. a support plate adapted to be positioned to overlie the feed table between the feed rolls and the cutting means in proximity to the feed table and adapted to be moved away from the latter; the support plate having inner and outer ends extending across the feed table, the outer end being adjacent the feed rolls, and the inner end being spaced from the cutting means a predetermined distance when the support plate is in proximity to the feed table; b. a pressure pad having inner and outer edges extending across the feed table, said outer edge being pivotally attached to the inner end of the support plate along an axis, and said inner edge lying in close proximity to the cutting means when the support plate is in proximity to the feed table, the inner edge portion of the pressure pad being movable toward the feed table independently of motion of the support plate; c. first resilient means for holding at least the inner end of the support plate in proximity to the feed table; and d. second resilient means for resiliently holding the inner edge of the pressure pad in a predetermined but movable position proximate the feed table.
Claim 2
Dependent Claim
254 words
In a machine for cutting sheet material which includes a feed table, cutting means at the inner end of the feed table, and top and bottom feed rolls at the outer end of the feed table for feeding said material along the feed table toward the cutting means, that improvement which comprises a. a support plate adapted to be positioned to overlie the feed table between the feed rolls and the cutting means in proximity to the feed table and adapted to be moved away from the latter; the support plate having inner and outer ends extending across the feed table, the outer end being adjacent the feed rolls, and the inner end being spaced from the cutting means a predetermined distance when the support plate is in proximity to the feed table; b. a pressure pad having inner and outer edges extending across the feed table, said outer edge being pivotally attached to the inner end of the support plate along an axis, and said inner edge lying in close proximity to the cutting means when the support plate is in proximity to the feed table, the inner edge portion of the pressure pad being movable toward the feed table independently of motion of the support plate; c. first resilient means for holding at least the inner end of the support plate in proximity to the feed table; and d. second resilient means for resiliently holding the inner edge of the pressure pad in a predetermined but movable position proximate the feed table.
Claim 3
Dependent Claim
41 words
The machine of claim 1 in which said first means comprises a fluid operated cylinder and piston combination, one member of said combination being attached to said machine, and the other member of said combination being attached to the support plate.
Claim 4
Dependent Claim
30 words
The first means is actuated to move the support plate and pressure pad away from the feed table and draw the pressure pad out from beneath the safety gate; and
Claim 5
Dependent Claim
30 words
The first means is actuated to move the support plate and pressure pad away from the feed table and draw the pressure pad out from beneath the safety gate; and
Claim 6
Dependent Claim
29 words
The third means is actuated to move the safety gate toward the feed table to a safety position wherein it prevents access to the cutting mechanism. e. Second sequence:
Claim 7
Dependent Claim
29 words
The third means is actuated to move the safety gate toward the feed table to a safety position wherein it prevents access to the cutting mechanism. e. Second sequence:
Claim 8
Dependent Claim
85 words
The machine of claim 1 in which said first means comprises a lever having one end pivotally supported on the body of said machine; a bearing mounted on the inner end portion of said support plate, the other end of the lever engaging said bearing; and adjustable spring means engaging the lever and resiliently biasing said other end of the lever in a direction toward the feed table and thereby resiliently holding the inner end of the support plate in proximity to the feed table.
Claim 9
Dependent Claim
39 words
The machine of claim 3 wherein said lever is slidable away from the support plate to release the end of the lever from said bearing, thereby to permit the support plate to be moved away from the feed table.
Claim 10
Dependent Claim
30 words
The third means is actuated to move the safety gate away from the feed table to a position at which the pressure pad may be repositioned underneath the safety gate;
Claim 11
Dependent Claim
30 words
The third means is actuated to move the safety gate away from the feed table to a position at which the pressure pad may be repositioned underneath the safety gate;
Claim 12
Dependent Claim
43 words
The machine of claim 1 in which said second means comprises a fluid operated cylinder and piston combination, one member of said combinAtion being connected to the support plate, and the other member of said combination piston being connected to the pressure pad.
Claim 13
Dependent Claim
20 words
The first means is actuated to move the support plate and pressure pad to proximity with the feed table; and
Claim 14
Dependent Claim
20 words
The first means is actuated to move the support plate and pressure pad to proximity with the feed table; and
Claim 15
Dependent Claim
19 words
The third means is actuated to move the safety gate toward the pressure pad in position to bear thereagainst.
Claim 16
Dependent Claim
19 words
The third means is actuated to move the safety gate toward the pressure pad in position to bear thereagainst.
Claim 17
Dependent Claim
90 words
The machine of claim 1 in which said second means comprises a safety gate positioned before the cutting means and extending across the feed table, the safety gate being movable toward and away from the pressure pad and the feed table, and having a lower edge adapted to engage the pressure pad to bias the latter toward the feed table; and third means for moving the safety gate toward and away from the pressure pad and the feed table, said third means applying a resilient force to the safety gate.
Claim 18
Dependent Claim
80 words
The machine of claim 1 in which said second means comprises first upright support means mounted on the inner end portion of the support plate; second upright support means mounted on the pressure pad and in alignment with the first support means in a direction perpendicular to said axis; and a compression spring mounted under compression between said first and second support means thereby to resiliently bias and hold the inner edge of the pressure pad in said predetermined position.
Claim 19
Dependent Claim
42 words
The machine of claim 2 in which said second means comprises a fluid operated cylinder and piston combination, one member of said combination being connected to said support plate, and the other member of said combination being connected to the pressure pad.
Claim 20
Dependent Claim
81 words
The machine of claim 2 in which said second means comprises a first upright support means mounted on the inner end portion of the support plate; second upright support means mounted on the pressure pad and in alignment with the first support means in a direction perpendicular to said axis; and a compression spring mounted under compression between said first and second support means thereby to resiliently bias and hold the inner edge of said pressure pad in said predetermined position.
Claim 21
Dependent Claim
90 words
The machine of claim 2 in which said second means comprises a safety gate positioned before the cutting means and extending across the feed table; the safety gate being movable toward and away from the pressure pad and the feed table, and having a lower edge adapted to engage the pressure pad and bias the latter toward the feed table; and third means for moving the safety gate toward and away from the pressure pad and the feed table, the third means applying a resilient force to the safety gate.
Claim 22
Dependent Claim
42 words
The machine of claim 3 in which said second means comprises a fluid operated cylinder and piston combination, one member of said combination being connected to the support plate, and the other member of said combination being connected to the pressure pad.
Claim 23
Dependent Claim
81 words
The machine of claim 3 in which said second means comprises a first upright support means mounted on the inner end portion of the support plate; second upright support means mounted on the pressure pad and in alignment with the first support means in a direction perpendicular to said axis; and a compression spring mounted under compression between the first and second support means thereby to resiliently bias and hold the inner edge of the pressure pad in said predetermined position.
Claim 24
Dependent Claim
90 words
The machine of claim 3 in which said second means comprises a safety gate positioned before the cutting means and extending across the feed table, the safety gate being movable toward and away from the pressure pad and the feed table, and having a lower edge adapted to engage the pressure pad and bias the latter toward the feed table; and third means for moving the safety gate toward and away from the pressure pad and the feed table, the third means applying a resilient force to the safety gate.
Claim 25
Dependent Claim
74 words
The machine of claim 6 including a control system therefor, comprising a. said first means for moving the support plate and the pressure pad toward and away from the feed table; b. said third means for moving the safety gate toward and away from the pressure pad; and c. control means which upon manual actuation thereof causes actuation of the first and thIrd means in the following first and second sequences: d. First sequence:
Claim 26
Dependent Claim
51 words
The machine of claim 14 in which said first and third means are pneumatic cylinders, and said control means comprises a plurality of pilot valves and control valves, the pilot valves when actuated, directing the control valves to operate automatically the first and third means in said first and second sequences.
Claim 27
Dependent Claim
95 words
The machine of claim 1 including a safety gate movable toward and away from the table between the inner edge of the pressure pad and the cutting means, the safety gate abutting the rear portion of the bed knife when the safety gate is moved toward the table, the inner edge of the pressure pad being provided with sealing means adapted to bear against the safety gate when the latter is in the positions it occupies when the cutting means is operating, and when the safety gate has been moved to abut the bed knife.
References Cited (Backward Citations)
US2812815A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-08-06 | 1977-02-05 | 1977-08-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-08-06 | 1981-02-05 | 1981-08-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-08-06 | 1985-02-05 | 1985-08-07 | $7700.00 | Window Closed / Lapsed |