US3841189A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cutting die and process
Assignee: MILLER M GmbH
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Filing: 1972-01-10
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Granted: 1974-10-15
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Expires: 1992-01-10
Abstract
Abstract The cutting die is made from strip steel and comprises a die blade having a cutting edge formed with sawteeth and chamfered surfaces extending along said cutting edge on opposite sides of said blade. To cut through a material which comprises a fabric having first filament portions extending in a predetermined direction and second filament portions extending transversely to said predetermined direction, said material is cut into at a plurality of discrete points which are spaced apart on an intended line of cut extending in said predetermined direction and said first filament portions which are disposed adjacent to said line of cut are pushed laterally away from said line of cut. At the same time, the cutting into said material is continued along said line of cut until said second filament portions extending across said line of cut have been severed.
Inventors
- 👤 E Spengler
- 👤 R Stursberg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 11:57
CPC Classifications
D; D06; D06H; D06H7/00; D06H7/24; B; B26; B26F; B26F1/00; B26F1/38; B26F1/44; B26F2001/4472; B26F2001/4481; B26F2210/00; B26F2210/12; B26F2210/16; Y; Y10; Y10S; Y10S83/00; Y10S83/929; Y10S83/936; Y10T; Y10T83/00; Y10T83/04; Y10T83/0481; Y10T83/929; Y10T83/9314; Y10T83/9454
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
297 words
A cutting die comprising a longitudinally extending strip steel die blade having a pair of longitudinally extending planar first sides with approximately parallel surfaces and a longitudinally extending second side relatively narrow compared to said first sides and extending along one longitudinal edge of the parallel side surfaces of said first sides, said second side forming a cutting edge spaced between the extension of the planes of said first sides and comprising a plurality of sawteeth with each sawtooth having a pointed tip and a pair of first edge portions extending in generally the direction of said first sides and diverging from said pointed tip with each said first edge portion being rectilinear and each said pair of edge portions forming a V-shaped configuration, each said sawtooth having at least one second edge portion extending transversely of said cutting edge and tapering rectilinearly outwardly from said pointed tip toward one of said first sides, each said sawtooth is pyramidally shaped and has planar sides extending from said pointed tip and said first edge portion and toward the parallel side surfaces of said die blade, said planar sides being spaced wholly inwardly of the extension of the planes of said first sides, each of said first sides having a continuous planar chamfered surface extending from the approximately parallel first side surface and tapering inwardly toward the other first side surface to said planar sides of said sawteeth, and the included angle between said second edge portion and the extension of the plane of said first side on the same side of said die with said second edge portions is greater than the included angles between said chamfered surface and the plane of said first side on the same side of said die blade as said second edge portions.
Claim 2
Dependent Claim
297 words
A cutting die comprising a longitudinally extending strip steel die blade having a pair of longitudinally extending planar first sides with approximately parallel surfaces and a longitudinally extending second side relatively narrow compared to said first sides and extending along one longitudinal edge of the parallel side surfaces of said first sides, said second side forming a cutting edge spaced between the extension of the planes of said first sides and comprising a plurality of sawteeth with each sawtooth having a pointed tip and a pair of first edge portions extending in generally the direction of said first sides and diverging from said pointed tip with each said first edge portion being rectilinear and each said pair of edge portions forming a V-shaped configuration, each said sawtooth having at least one second edge portion extending transversely of said cutting edge and tapering rectilinearly outwardly from said pointed tip toward one of said first sides, each said sawtooth is pyramidally shaped and has planar sides extending from said pointed tip and said first edge portion and toward the parallel side surfaces of said die blade, said planar sides being spaced wholly inwardly of the extension of the planes of said first sides, each of said first sides having a continuous planar chamfered surface extending from the approximately parallel first side surface and tapering inwardly toward the other first side surface to said planar sides of said sawteeth, and the included angle between said second edge portion and the extension of the plane of said first side on the same side of said die with said second edge portions is greater than the included angles between said chamfered surface and the plane of said first side on the same side of said die blade as said second edge portions.
Claim 3
Dependent Claim
153 words
A cutting die, as set forth in claim 1, wherein said planar sides of each of said sawteeth form a quadrangular pyramid having two said first cutting edge portions which lie in the plane extending in the longitudinal direction of said blade and said first edge portions include an acute angle with each other, and two said second edge portions which extend transversely of said first edge portions each on an opposite side of said die blade and terminate at said chamfered surface on that side of said blade and said second edge portions include an angle which is larger than the angle included by the intersecting projections of said chamfered surfaces, said side of said sawteeth extend farther away from its said pointed tip than said first edge portions and said second edge portions, and said second sides of adjacent ones of said sawteeth terminate and join adjacent two said chamfered surfaces.
Claim 4
Dependent Claim
185 words
A cutting die, as set forth in claim 1, wherein said planar sides of each of said sawteeth form a triangular pyramid having a firSt side face which is disposed on one side of said blade and adjoins one of said chamfered surfaces, and a second and a third side face each of which are disposed on the other side of said blade and adjoin at said second edge portion which extends transversely of the longitudinal direction of said blade and terminate at said chamfered surface on said other side, said second edge portion and said first side face include an angle which is larger than the angle included by the intersecting projections of said chamfered surfaces, said second and third side faces extend from said pointed tip farther into the chamfered surface on said other side than said second edge portion, and said first side face defines said first edge portions with said second and third side faces and said first edge portions extend at an oblique angle to the longitudinal direction of said blade and are offset from the longitudinal center line thereof.
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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) | 1977-10-14 | 1978-04-15 | 1978-10-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-10-14 | 1982-04-15 | 1982-10-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-10-14 | 1986-04-15 | 1986-10-15 | $7700.00 | Window Closed / Lapsed |