Patent US3875833A successfully refreshed from Google Patents.
US3875833A
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Apparatus for cutting off sheet-metal containers
Assignee: L Schuler GmbH
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Filing: 1974-02-20
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Granted: 1975-04-08
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Expires: 1994-02-20
Abstract
Abstract Apparatus for severing waste material from cylindrical sheetmetal containers, which apparatus includes an inside mandrel having a cutting edge formed along a predetermined parting line of a container inserted thereover. A counter tool in the form of a contact pressure piece is provided for pressing the container material radially inwardly to tear the same along the predetermined parting line by way of the tool edge of the mandrel. This contact pressure piece is spaced axially from the tool edge and between the tool edge and an abutment for the waste portion of the container material such that the counter tool acts only to exert pressure on the container material with the severing taking place at a position spaced therefrom. Since the tool edge of the mandrel and the contact pressure piece of the counter tool are spaced from one another, the counter tool experiences practically no wear and tear, while the arrangement advantageously provides a smooth, burr-free parting edge for the materials being severed.
Inventors
- 👤 Reinhard Kannegiesser
- 👤 Werner Tiefenbach
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 12:23
CPC Classifications
B; B23; B23D; B23D31/00; B23D31/001; Y; Y10; Y10T; Y10T82/00; Y10T82/16; Y10T82/16147; Y10T82/16196; Y10T82/16213; Y10T82/16426; Y10T82/16639; Y10T82/16655; Y10T82/16688; Y10T82/16967
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
159 words
Apparatus for severing sheet-material blanks comprising: a blank holder for holding a blank, said blank holder having a sharp tool edge extending along a predetermined parting line, an abutment spaced from said sharp tool edge for abuttingly engaging a portion of said blank at the side of the material of said blank facing toward said blank holder, a countertool which is engageable with the side of said material facing away from said blank holder for cooperating with said sharp tool edge to sever said blank along said parting line, and moving means for moving said blank holder and countertool toward one another in the direction of the thickness of said sheet material to effect a severing operation with severing of said sheet material along said parting line, wherein the countertool is constructed as a non-cutting contact pressure piece which is disposed at a spacing from the tool edge between the tool edge and said abutment during said severing operations.
Claim 2
Dependent Claim
159 words
Apparatus for severing sheet-material blanks comprising: a blank holder for holding a blank, said blank holder having a sharp tool edge extending along a predetermined parting line, an abutment spaced from said sharp tool edge for abuttingly engaging a portion of said blank at the side of the material of said blank facing toward said blank holder, a countertool which is engageable with the side of said material facing away from said blank holder for cooperating with said sharp tool edge to sever said blank along said parting line, and moving means for moving said blank holder and countertool toward one another in the direction of the thickness of said sheet material to effect a severing operation with severing of said sheet material along said parting line, wherein the countertool is constructed as a non-cutting contact pressure piece which is disposed at a spacing from the tool edge between the tool edge and said abutment during said severing operations.
Claim 3
Dependent Claim
46 words
Apparatus according to claim 1, wherein said blank holder is of cylindrical shape for engaging one of the inside and outside walls of a blank of cylindrical shape, and wherein said predetermined parting line extends in a circle about the longitudinal axis of said blank holder.
Claim 4
Dependent Claim
78 words
Apparatus according to claim 2, wherein said blank holder is constructed as a mandrel insertable inside of a cylindrically shaped container blank, wherein said abutment is a cylindrical member of approximately the same diameter extending about the same axis as said mandrel, and wherein an annular gap is formed between said tool edge and said abutment for accommodating relative movement of said counter tool and tool edge, as well as cut portions of blank, during said severing operations.
Claim 5
Dependent Claim
53 words
Apparatus according to claim 3, wherein said countertool is fixed in position, and wherein said moving means includes means for moving said mandrel about an axis positioned outside of said mandrel and parallel to the axis of the mandrel, as well as means for rotating said mandrel about the axis of the mandrel.
Claim 6
Dependent Claim
32 words
Apparatus according to claim 1, wherein said contact pressure piece extends at an acute angle with respect to the sheet material of a blank being held by said blank holder and abutment.
Claim 7
Dependent Claim
31 words
Apparatus according to claim 3, wherein said contact pressure piece extends at an acute angle with respect to the sheet material of a blank being held by said mandrel and abutment.
Claim 8
Dependent Claim
60 words
Apparatus according to claim 1, wherein said contact pressure piece exhibits two rounded portions engageable directly with said sheet material and spaced from one another in the direction from said tool edge toward said abutment, the rounded portion closest to the tool edge having a radius of curvature no greater than the radius of curvature of the other rounded portion.
Claim 9
Dependent Claim
60 words
Apparatus according to claim 3, wherein said contact pressure piece exhibits two rounded portions engageable directly with said sheet material and spaced from one another in the direction from said tool edge toward said abutment, the rounded portion closest to the tool edge having a radius of curvature no greater than the radius of curvature of the other rounded portions.
Claim 10
Dependent Claim
27 words
Apparatus according to claim 8, wherein said contact pressure piece exhibits a straight portion connecting said rounded portions which is parallel to the axis of said mandrel.
Claim 11
Dependent Claim
71 words
Apparatus according to claim 8, wherein the rounded portion closest to the tool edge merges at the side thereof closest to the tool edge with a side of said contact pressure piece which is perpendicular to the axis of said mandrel, and wherein the other rounded portion closest to the abutment merges with a side of said contact pressure piece which is inclined with respect to the axis of the mandrel.
Claim 12
Dependent Claim
48 words
Apparatus according to claim 10, wherein said annular gap exhibits a half V-shaped cross-section with the edge closest to the cutting edge extending radially of the axis of the mandrel and the edge closest to the abutment inclined similarly as the inclined side of the contact pressure piece.
Claim 13
Dependent Claim
53 words
Apparatus according to claim 11, wherein said countertool is fixed in position, and wherein said moving means includes means for moving said mandrel about an axis positioned outside of said mandrel and parallel to the axis of the mandrel, as well as means for rotating said mandrel about the axis of the mandrel.
Claim 14
Dependent Claim
61 words
Apparatus according to claim 3, wherein said countertool is a rotatable approximately cylindrically shaped member having an axis of rotation parallel to the axis of the mandrel, and wherein said moving means includes means for moving the axes of said countertool and mandrel toward one another, as well as means for rotating said mandrel and said countertool in respective opposite directions.
Claim 15
Dependent Claim
60 words
Apparatus according to claim 11, wherein said countertool is rotatable approximately cylindrically shaped member having an axis of rotation parallel to the axis of the mandrel, and wherein said moving means includes means for moving the axes of said countertool and mandrel toward one another, as well as means for rotating said mandrel and said countertool in respective opposite directions.
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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) | 1978-04-07 | 1978-10-07 | 1979-04-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-04-07 | 1982-10-07 | 1983-04-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-04-07 | 1986-10-07 | 1987-04-08 | $7700.00 | Window Closed / Lapsed |