US3855892A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cutting rule
Assignee: CIR CUT CORP
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Filing: 1973-03-07
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Granted: 1974-12-24
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Expires: 1993-03-07
Abstract
Abstract A cutting rule for rotary die cutting apparatus having an asymmetric sawtooth cutting edge in which the depth of the crotch between adjacent teeth is substantially less than half the distance between adjacent teeth tips and the crotch is located longitudinally closer to one of the tooth tips than to the other of the pair of teeth between which it lies. The cutting rule stock is provided with front and back pre-bevels, and the toothcutting grinder moves transversely across the rule stock at approximately a 30* angle. The asymmetric sawtooth cutting rule effects a reduction in the required applied cutting force of approximately forty percent and reduces cutting penetration into the anvil cover by about the same amount resulting in extended life of the diecutting equipment.
Inventors
- 👤 C Dilello
- 👤 D Hart
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 17:49
CPC Classifications
B; B23; B23D; B23D1/00; B23D1/08; B23D1/10; B23D1/12; Y; Y10; Y10T; Y10T83/00; Y10T83/465; Y10T83/4766; Y10T83/4795; Y10T83/483; Y10T83/4838; Y10T83/4841; Y10T83/929; Y10T83/9319
Claims Analysis
Total Claims: 24
Claim 1
Independent Claim
129 words
In a cutting rule of the general type having an elongated flat body portion with teeth formed along at least one longitudinal edge thereof, the improvement wherein said teeth comprise a series of adjacent asymmetric teeth, each tooth having a tooth tip and first and second tooth side edges, said tooth side edges diverging from one another from the tooth tip to points of intersection with the side edges of the teeth immediately adjacent to and disposed at opposite sides of said each tooth to form tooth crotches at the said points of intersection, said first and second tooth side edges respectively intersecting a datum line at different first and second angles, and the said tips of said series of adjacent asymmetric teeth being disposed along a straight line.
Claim 2
Dependent Claim
129 words
In a cutting rule of the general type having an elongated flat body portion with teeth formed along at least one longitudinal edge thereof, the improvement wherein said teeth comprise a series of adjacent asymmetric teeth, each tooth having a tooth tip and first and second tooth side edges, said tooth side edges diverging from one another from the tooth tip to points of intersection with the side edges of the teeth immediately adjacent to and disposed at opposite sides of said each tooth to form tooth crotches at the said points of intersection, said first and second tooth side edges respectively intersecting a datum line at different first and second angles, and the said tips of said series of adjacent asymmetric teeth being disposed along a straight line.
Claim 3
Dependent Claim
25 words
A cutting rule teeth structure as defined in claim 1 wherein said first and second tooth side edges are substantially straight and of different lengths.
Claim 4
Dependent Claim
20 words
A cutting rule teeth structure as defined in claim 1 wherein said datum line passes through tips of said teeth.
Claim 5
Dependent Claim
23 words
A cutting rule teeth structure as defined in claim 1 wherein said datum line passes through the tips of all of said teeth.
Claim 6
Dependent Claim
29 words
A cutting rule teeth structure as defined in claim 1 wherein said tooth crotches are all located at substantially equal distances from lines joining the tips of adjacent teeth.
Claim 7
Dependent Claim
30 words
A cutting rule teeth structure as defined in claim 1 wherein the depth of said tooth crotches is less than one half the distance between the tips of adjacent teeth.
Claim 8
Dependent Claim
29 words
A cutting rule teeth structure as defined in claim 1 wherein the depth of said tooth crotches is substantially one fifth the distance between the tips of adjacent teeth.
Claim 9
Dependent Claim
34 words
A cutting rule teeth structure as defined in claim 1 wherein the crotch between each adjacent pair of teeth is located longitudinally closer to one adjacent tip than to the other adjacent tooth tips.
Claim 10
Dependent Claim
45 words
A cutting rule teeth structure as defined in claim 1 wherein the crotch between each adjacent pair of teeth is located longitudinally between the adjacent tooth tips at a point from one of said tooth tips which is substantially one third of the tip-to-tip distance.
Claim 11
Dependent Claim
52 words
A cutting rule teeth structure as defined in claim 1 wherein said datum Line passes through the tips of substantially all of said teeth, wherein said first and second tooth side edges are substantially straight and of different lengths and intersect said datum line respectively at angles of substantially 18* and 34*.
Claim 12
Dependent Claim
32 words
A cutting rule as defined in claim 1 wherein the teeth are cut along a longitudinal edge at an angle of substantially thirty degrees transversely to the plane of the cutting rule.
Claim 13
Dependent Claim
35 words
A cutting rule teeth structure as defined in claim 6 wherein the crotch between each adjacent pair of teeth is located longitudinally closer to one adjacent tooth tip than to the other adjacent tooth tips.
Claim 14
Dependent Claim
45 words
A cutting rule teeth structure as defined in claim 7 wherein the crotch between each adjacent pair of teeth is located longitudinally between the adjacent tooth tips at a point from one of said tooth tips which is substantially one third of the tip-to-tip distance.
Claim 15
Dependent Claim
52 words
A cutting rule teeth structure as defined in claim 13 wherein said datum line passes through the tips of substantially all of said teeth, wherein said first and second tooth side edges are substantially straight and of different lengths and intersect said datum line respectively at angles of substantially 18* and 34*.
Claim 16
Dependent Claim
172 words
In a cutting rule of the general type having an elongated flat body portion with teeth formed along at least one longitudinal edge thereof, the improvement wherein said teeth comprise a continuous unbroken row of identical adjacent asymmetric teeth, each tooth having a tooth tip and longer and shorter straight sided tooth edges which diverge from the tooth tip to points of intersection respectively with the shorter and longer side edges of the adjacent teeth to form tooth crotches at said intersections, said longer and shorter tooth side edges respectively intersecting a datum line at different first and second angles, said datum line being tangent to the tips of all of said teeth and said tooth crotches being all located at the same distance from said datum line to thereby define crotches of equal depth, the depth of said tooth crotches being less than half the distance between the tips of adjacent teeth, and each crotch being located longitudinally closer to one adjacent tooth tip than to the other adjacent tooth tip.
Claim 17
Dependent Claim
172 words
In a cutting rule of the general type having an elongated flat body portion with teeth formed along at least one longitudinal edge thereof, the improvement wherein said teeth comprise a continuous unbroken row of identical adjacent asymmetric teeth, each tooth having a tooth tip and longer and shorter straight sided tooth edges which diverge from the tooth tip to points of intersection respectively with the shorter and longer side edges of the adjacent teeth to form tooth crotches at said intersections, said longer and shorter tooth side edges respectively intersecting a datum line at different first and second angles, said datum line being tangent to the tips of all of said teeth and said tooth crotches being all located at the same distance from said datum line to thereby define crotches of equal depth, the depth of said tooth crotches being less than half the distance between the tips of adjacent teeth, and each crotch being located longitudinally closer to one adjacent tooth tip than to the other adjacent tooth tip.
Claim 18
Dependent Claim
57 words
A cutting rule as defined in claim 15 wherein the depth of said tooth crotches is substantially one fifth the distance between the tips of adjacent teeth and wherein said crotch is located longitudinally between the adjacent tooth tips at a point from one of said tooth tips which is substantially one third of the tip-to-tip distance.
Claim 19
Dependent Claim
31 words
A cutting rule as defined in claim 15 wherein the teeth are cut along a longitudinal edge at an angle of substantially 30* transversely to the plane of the cutting rule.
Claim 20
Dependent Claim
43 words
A cutting rule as defined in claim 16 wherein one longitudinal face of the entire array of teeth is provided with a very shallow bevel and wherein the opposite longitudinal face of the entire array of teeth is provided with a steeper bevel.
Claim 21
Dependent Claim
57 words
A cutting rule as defined in claim 16 wherein the teeth are cut along a longitudinal edge at an angle of substantially thirty degrees transversely to the plane of the cutting rule, and wherein said first and second angles at which said longer and shorter tooth sides intersect said datum line are respectively substantially 18* and 34*.
Claim 22
Dependent Claim
112 words
In a cutting rule of the general type having an elongated flat body portion with teeth formed along at least one longitudinal edge thereof, the improvement wherein said teeth comprise a series of adjacent teeth, each tooth having a tooth tip and first and second tooth side edges, said tooth side edges diverging from one another from the tooth tip to points of intersection with the side edges of the teeth immediately adjacent to and disposed at opposite sides of said each tooth to form tooth crotches at the said points of intersection, the depth of said tooth crotches being less than oNe half the distance between the tips of adjacent teeth.
Claim 23
Dependent Claim
112 words
In a cutting rule of the general type having an elongated flat body portion with teeth formed along at least one longitudinal edge thereof, the improvement wherein said teeth comprise a series of adjacent teeth, each tooth having a tooth tip and first and second tooth side edges, said tooth side edges diverging from one another from the tooth tip to points of intersection with the side edges of the teeth immediately adjacent to and disposed at opposite sides of said each tooth to form tooth crotches at the said points of intersection, the depth of said tooth crotches being less than oNe half the distance between the tips of adjacent teeth.
Claim 24
Dependent Claim
28 words
A cutting rule teeth structure as defined in claim 20 wherein the depth of said tooth crotches is substantially one-fifth the distance between the tips of adjacent teeth.
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) | 1977-12-23 | 1978-06-24 | 1978-12-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-12-23 | 1982-06-24 | 1982-12-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-12-23 | 1986-06-24 | 1986-12-24 | $7700.00 | Window Closed / Lapsed |