Patent US4068366A successfully refreshed from Google Patents.
US4068366A
Expired / Lapsed
US
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Method and apparatus for producing openings in sheet material
Assignee: Individual
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Filing: 1976-11-01
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Granted: 1978-01-17
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Expires: 1996-11-01
Abstract
Abstract A method and an apparatus for producing openings in sheet metal material being provided in band form as well as a perforated sheet material produced by said method. The method comprises providing notches in the sheet material and stretching partial areas of the notched sheet material by a thickness-reducing processing step, whereby the notches which lie between the stretched partial areas of the notched sheet material are enlarged to form openings. The apparatus for producing openings in sheet metal material comprises roller means for producing notches in the sheet material and roller means for stretching partial areas of the notched sheet material by thickness reduction. The resulting perforated sheet metal material combines the advantages of punched sheet metal, i.e., mechanical stability, and expanded metal mesh, i.e., no loss of material during production of the openings in the sheet material.
Inventors
- 👤 Hans Hillesheim
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 00:30
CPC Classifications
B; B21; B21D; B21D31/00; B21D31/04; B21D31/046; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/496; Y10T29/4998; Y10T29/49982; Y10T29/49986; Y10T428/00; Y10T428/12; Y10T428/12361
Claims Analysis
Total Claims: 24
Claim 1
Independent Claim
92 words
A process for producing openings in sheet material, said openings being aligned in a longitudinal direction of said material, comprising the steps of: deforming the sheet material to provide notches therein arranged in rows extending in said longitudinal direction; and reducing the thickness of partial areas of the notched sheet material between said rows, said partial areas including the ends of the notches, thus enlarging the notches which lie between the reduced thickness partial areas of the notched sheet material to form openings extending between the major surfaces of said sheet material.
Claim 2
Dependent Claim
92 words
A process for producing openings in sheet material, said openings being aligned in a longitudinal direction of said material, comprising the steps of: deforming the sheet material to provide notches therein arranged in rows extending in said longitudinal direction; and reducing the thickness of partial areas of the notched sheet material between said rows, said partial areas including the ends of the notches, thus enlarging the notches which lie between the reduced thickness partial areas of the notched sheet material to form openings extending between the major surfaces of said sheet material.
Claim 3
Dependent Claim
24 words
The process according to claim 1 wherein said deforming step provides notches which extend through less than the entire thickness of said sheet material.
Claim 4
Dependent Claim
31 words
The process according to claim 1, wherein said deforming step includes passing said sheet material between said toothed roller and another toothed roller to form notches on both major surfaces thereof.
Claim 5
Dependent Claim
27 words
The process according to claim 1, comprising the additional step of heating said sheet material after said thickness reducing step to deform the edges of said openings.
Claim 6
Dependent Claim
55 words
The process according to claim 1, wherein a toothed roller is utilized to perform said deforming step, and the teeth of said toothed roller are longer at a point between the edges thereof than of said edges, so that said teeth first deform said sheet material at points intermediate the edges of the corresponding notches.
Claim 7
Dependent Claim
31 words
The process according to claim 1, comprising the additional step of forming said sheet material so that said notches lie in a different plane than other parts of the sheet material.
Claim 8
Dependent Claim
20 words
The process according to claim 1, wherein said notches are elongated in a direction angularly displaced from said longitudinal direction.
Claim 9
Dependent Claim
24 words
The process according to claim 1, comprising the additional step of coating said sheet material with a plastic substance, after said thickness reducing step.
Claim 10
Dependent Claim
11 words
The process according to claim 1, wherein said material is steel.
Claim 11
Dependent Claim
27 words
The process according to claim 2, wherein said steps are carried out while maintaining said web at a temperature in the range of 400° to 500° C.
Claim 12
Dependent Claim
11 words
A perforated sheet product made by the process of claim 11.
Claim 13
Dependent Claim
11 words
A perforated sheet product made by the process of claim 2.
Claim 14
Dependent Claim
27 words
The process according to claim 1, where the notches in a given row of said sheet material are staggered with respect to notches in adjacent rows thereof.
Claim 15
Dependent Claim
150 words
Apparatus for producing openings in sheet material, said openings being aligned in a longitudinal direction of said material, comprising: a roller and a cooperating counter-roller for deforming sheet material to produce rows of notches therein, said rows extending in said longitudinal direction, at least one of said rollers having notching teeth distributed over the circumferential surface thereof, said teeth being arranged in rows oriented in said longitudinal direction, at least one of said rollers having raised profile faces for reducing the thickness of said sheet material in strips extending in said longitudinal direction and disposed between said rows of notches, the width of said profile faces being such that said reduced thickness strips include the ends of said notches, said rollers being spaced apart by a distance less than the initial thickness of said sheet material; and means for producing relative rolling motion between said rollers and said sheet material.
Claim 16
Dependent Claim
150 words
Apparatus for producing openings in sheet material, said openings being aligned in a longitudinal direction of said material, comprising: a roller and a cooperating counter-roller for deforming sheet material to produce rows of notches therein, said rows extending in said longitudinal direction, at least one of said rollers having notching teeth distributed over the circumferential surface thereof, said teeth being arranged in rows oriented in said longitudinal direction, at least one of said rollers having raised profile faces for reducing the thickness of said sheet material in strips extending in said longitudinal direction and disposed between said rows of notches, the width of said profile faces being such that said reduced thickness strips include the ends of said notches, said rollers being spaced apart by a distance less than the initial thickness of said sheet material; and means for producing relative rolling motion between said rollers and said sheet material.
Claim 17
Dependent Claim
59 words
The apparatus as claimed in claim 14, in which the roller having notching teeth comprises a roller body and roller rings mounted on the roller body, at least some of the roller rings having notching teeth, said rings being spaced apart from each other on said roller body, said notching teeth comprising material cast into the corresponding roller rings.
Claim 18
Dependent Claim
63 words
The apparatus as claimed in claim 14, in which the roller having notching teeth comprises a roller body and roller rings mounted on the roller body, at least some of the roller rings having notching teeth, said rings being spaced apart from each other on said roller body, said notching teeth being individually affixed to the circumferential surfaces of the corresponding roller rings.
Claim 19
Dependent Claim
49 words
An apparatus as claimed in claim 16, in which the roller rings each comprise at least two partial rings connected to each other to fasten the notching teeth, forming a cut-out recess in the vicinity of the outer circumference in which the notching teeth are anchored by complementary feet.
Claim 20
Dependent Claim
22 words
An apparatus as claimed in claim 14, further comprising heating means for fusing the edges of the openings of the sheet material.
Claim 21
Dependent Claim
145 words
Apparatus for producing openings in sheet material, said openings being aligned in a longitudinal direction of said sheet material, comprising: a notching roller having notching teeth, a profile roller, and a common counter-roller adjacent said notching and profile rollers, said notching roller cooperating with said counter-roller for deforming sheet material to produce rows of notches therein extending in said longitudinal direction, said profile roller cooperating with said counter-roller to reduce the thickness of said sheet material in strips extending in said longitudinal direction and disposed between said rows of notches, the width of said profile roller being such that said reduced thickness strips include the ends of said notches, said counter-roller being spaced apart from said other rollers by distances less than the initial thickness of said sheet material; and means for feeding said sheet material between said counter-roller and each of said other rollers.
Claim 22
Dependent Claim
145 words
Apparatus for producing openings in sheet material, said openings being aligned in a longitudinal direction of said sheet material, comprising: a notching roller having notching teeth, a profile roller, and a common counter-roller adjacent said notching and profile rollers, said notching roller cooperating with said counter-roller for deforming sheet material to produce rows of notches therein extending in said longitudinal direction, said profile roller cooperating with said counter-roller to reduce the thickness of said sheet material in strips extending in said longitudinal direction and disposed between said rows of notches, the width of said profile roller being such that said reduced thickness strips include the ends of said notches, said counter-roller being spaced apart from said other rollers by distances less than the initial thickness of said sheet material; and means for feeding said sheet material between said counter-roller and each of said other rollers.
Claim 23
Dependent Claim
73 words
Perforated sheet material having openings produced by providing notches therein and stretching partial areas, including the edges of said notches to reduce the thickness thereof, the edges of said notches therefore being less thick than the remaining portions of the notches, said notches being enlarged by said stretching to form openings in said sheet material, the edges of said openings, corresponding to the edges of said notches, being deformed by heat-induced fusion thereof.
Claim 24
Dependent Claim
73 words
Perforated sheet material having openings produced by providing notches therein and stretching partial areas, including the edges of said notches to reduce the thickness thereof, the edges of said notches therefore being less thick than the remaining portions of the notches, said notches being enlarged by said stretching to form openings in said sheet material, the edges of said openings, corresponding to the edges of said notches, being deformed by heat-induced fusion thereof.
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) | 1981-01-16 | 1981-07-18 | 1982-01-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-01-16 | 1985-07-18 | 1986-01-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-01-16 | 1989-07-18 | 1990-01-17 | $7700.00 | Window Closed / Lapsed |