US3686987A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Machine for and process of diecutting
Assignee: Industrial Research Laboratories Inc
•
Filing: 1970-10-19
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Granted: 1972-08-29
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Expires: 1990-10-19
Abstract
Abstract Die and backer, constantly facing each other, travel in cooperating paths which bring them closer to each other with sheet material sandwiched between, all traveling at the same speed in the same direction, and then together to effect a contour cut. The die may move in a circular path or a quasi elliptical path and the backer may move in a similar path to the die or may move in a linear path. The two sides of the backer may be somewhat relatively dephased to produce a rocking component of motion and a rocking cut. Specific preferred structure includes shafts in sets of three and transmission of motion from below the sheet material to above it by pairs of lever arms attached to rollers in roller guides.
Inventors
- 👤 Rene D Colinet
- 👤 William I Bulmash
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 13:34
CPC Classifications
B; B26; B26F; B26F1/00; B26F1/38; B26F1/40; Y; Y10; Y10T; Y10T83/00; Y10T83/04; Y10T83/0515; Y10T83/465; Y10T83/4766; Y10T83/4783; Y10T83/4786
Claims Analysis
Total Claims: 24
Claim 1
Independent Claim
87 words
A rotary die-cutting press for materials in sheet form, operating by pure translation of a die platen and cooperation of a backer platen, comprising a die platen, two parallel crankshafts having identical cranks, turning in unison, means supporting the die platen from the cranks, a third shaft out of the line between the two crankshafts, means for operatively connecting said third shaft to the die platen to stabilize its motion, a backer platen and means for operatively manipulating the backer platen in cooperation with the die platen.
Claim 2
Dependent Claim
87 words
A rotary die-cutting press for materials in sheet form, operating by pure translation of a die platen and cooperation of a backer platen, comprising a die platen, two parallel crankshafts having identical cranks, turning in unison, means supporting the die platen from the cranks, a third shaft out of the line between the two crankshafts, means for operatively connecting said third shaft to the die platen to stabilize its motion, a backer platen and means for operatively manipulating the backer platen in cooperation with the die platen.
Claim 3
Dependent Claim
20 words
A rotary die-cutting press of claim 1, in combination with means for moving the die platen in a non-circular path.
Claim 4
Dependent Claim
25 words
A rotary die-cutting press of claim 2, in combination with means for moving the die platen in a quasi elliptical path having a straight portion.
Claim 5
Dependent Claim
99 words
A rotary die-cutting press of claim 3, in combination with means for moving the die platen and the backer platen to impinge by a first contact between one end of the die platen and the material at the beginning of the straight motion of the die platen, later changing it gradually to a contact traveling across the surface of the die as the latter moves along its straight run, and finally becoming a last contact between the opposite end of the die and the material to be cut at the termination of the straight motion of the die platen.
Claim 6
Dependent Claim
32 words
A rotary die-cutting press of claim 1, in which the motion of the die platen is accomplished by a four bar linkage connected to a rod and guided by a rocker arm.
Claim 7
Dependent Claim
92 words
A rotary die-cutting press of claim 1, comprising a rod pivoted on the crankpin of one of the cranks intermediate between the ends of the rod and having a pivot at one of its ends which pivotally supports one end of the die platen, an arm pivoted on a fixed pivot on the third shaft on one end and pivotally connected at the other end to the other end of said rod and a rod pivoted on the crank of the other crankshaft and supporting the other end of the die platen.
Claim 8
Dependent Claim
35 words
A rotary die-cutting press of claim 1, in combination with rollers supporting the ends of the backer platen and tracks guiding the rollers and the backer platen as it comes together with the die platen.
Claim 9
Dependent Claim
41 words
A rotary die-cutting press of claim 7, in combination with rollers at each end of the platens, horizontal tracks supporting the rollers and levers connecting each roller to an end of the backer platen and an end of the die platen.
Claim 10
Dependent Claim
17 words
A rotary die-cutting press of claim 7, in which the tracks are sloped in the same direction.
Claim 11
Dependent Claim
16 words
A rotary-die cutting press of claim 7, in which the tracks are sloped in opposite directions.
Claim 12
Dependent Claim
39 words
A rotary die-cutting press of claim 1, in combination with means including a surface on the backer platen which is high at the middle and lower at each end to produce a rocking contact at the time of cut.
Claim 13
Dependent Claim
53 words
A rotary die-cutting press of claim 1, in which the means supporting the die platen from the crankshafts coNstitutes bearings for the cranks, the third shaft is a crankshaft having a crank equal to the other cranks, and the means for connecting the third shaft to the die platen is a crank bearing.
Claim 14
Dependent Claim
25 words
A rotary die-cutting press of claim 1, in which all particles of the die platen go through a circular trajectory at a constant peripheral speed.
Claim 15
Dependent Claim
58 words
A rotary die-cutting press of claim 1, in which the die platen and the backer platen are synchronized by two pairs of identical levers pivotally connected each to one end of a platen, connected together to the other end by pairs, and in which rollers guide the other ends of the levers in motion parallel to the platen.
Claim 16
Dependent Claim
28 words
A rotary die-cutting press of claim 1, in which the die platen and the backer platen have a rocking motion from end to end as they come together.
Claim 17
Dependent Claim
28 words
A rotary die-cutting press of claim 1, in which the cranks are out of phase with respect to one another, said dephasing being fixed and not exceeding 30*.
Claim 18
Dependent Claim
88 words
A rotary die-cutting press of claim 1, including means for keeping the cutting edge of the die and the backer in planes that keep more or less parallel to each other but have a relative rocking motion as between the planes, which rocking motion goes from side to side as the work travels and causes one side of the die and backer platen to go through their cutting travel at least slightly in advance of the cutting travel of the other side of the die and backer platen.
Claim 19
Dependent Claim
37 words
A rotary die-cutting press of claim 1, having a set of cranks at both sides of the die platen, and having crankpins connecting the cranks together and to the die platen, in which the crankpins are straight.
Claim 20
Dependent Claim
42 words
A rotary die-cutting press of claim 1, having cranks at opposite sides of the die platen and pins connecting the cranks together and to the die platen in which the pins are curved and impart a rocking motion to the die platen.
Claim 21
Dependent Claim
50 words
A rotary die-cutting press of claim 1, in which the means for manipulating the backer platen comprises two parallel crankshafts, cranks supporting the backer platen and a third crank located outside the straight alignment of the first two cranks, and connected to the backer platen, all three cranks being identical.
Claim 22
Dependent Claim
39 words
A rotary die-cutting press of claim 1, comprising a resilient cushion between the platens engaging one another to reverse the stresses in the drive mechanism before and after contact has been obtained brtween the die between the backer platens.
Claim 23
Dependent Claim
16 words
A rotary die-cutting press of claim 1, having balancing of the moving parts to reduce vibration.
Claim 24
Dependent Claim
40 words
A rotary die-cutting press of claim 1, in combination with means for measuring the variation in electrical resistance between the die platen and its associated tools and the backer platen as a function of pressure when the cut takes place.
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) | 1975-08-29 | 1976-02-28 | 1976-08-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-08-29 | 1980-02-28 | 1980-08-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-08-29 | 1984-02-28 | 1984-08-29 | $7700.00 | Window Closed / Lapsed |