Patent US3823630A successfully refreshed from Google Patents.
US3823630A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Punch for simultaneously punching unequal sized holes
Assignee: AMERPLAST SF
•
Filing: 1973-05-24
•
Granted: 1974-07-16
•
Expires: 1993-05-24
Abstract
Abstract Punch apparatus for simultaneously punching concentric but unequal sized holes in two adjacent material sheets. The punch apparatus is made up of three members: a punch, a die block, and an intermediate piece. The intermediate piece coacts with the punch and performs the function of a die block, and the intermediate piece also coacts with the die block to perform the function of a punch. The first material sheet is located intermediate the punch and intermediate piece, and the second sheet of material is located intermediate the intermediate piece and the die block. Downward movement of the punch, in cooperation with the intermediate piece, punches one hole in the sheet between the punch and intermediate piece. Downward movement of the punch also causes the intermediate piece to move downward and punch a hole in the second sheet of material, concentric with the first hole, but of a different diameter. Flexible loosening rings can be used to facilitate removal of the punched out material. In addition to the loosening rings or alternatively in lieu thereof, the punch and die block are provided with air passages to communicate with an air supply to remove the punched out material.
Inventors
- 👤 H Suominen
- 👤 P Pyhalto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 14:24
CPC Classifications
B; B21; B21D; B21D28/00; B21D28/24; B21D28/26; B26; B26F; B26F1/00; B26F1/02; Y; Y10; Y10T; Y10T83/00; Y10T83/202; Y10T83/2066; Y10T83/2092; Y10T83/2096; Y10T83/2135; Y10T83/215; Y10T83/2155; Y10T83/2157; Y10T83/384; Y10T83/395; Y10T83/398; Y10T83/869; Y10T83/8821; Y10T83/8828; Y10T83/929; Y10T83/9411; Y10T83/9423; Y10T83/9425; Y10T83/9428; Y10T83/9432
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
110 words
Punching apparatus, capable of simultaneously and concentrically punching in two sheets of material holes of differing diameters, comprising a punch and die block, said punch being capable of reciprocating movement relative to said die block, an intermediate member located intermediate of said punch and said die block, said intermediate member having surfaces adjacent said punch and said die blcok, whereby cutting of one sheet of material occurs by cooperation between said punch and said face of said intermediate member adjacent said punch, and cutting of said second sheet of material occurs by reason of coaction between said face of said intermediate member adjacent said die block and said die block.
Claim 2
Dependent Claim
110 words
Punching apparatus, capable of simultaneously and concentrically punching in two sheets of material holes of differing diameters, comprising a punch and die block, said punch being capable of reciprocating movement relative to said die block, an intermediate member located intermediate of said punch and said die block, said intermediate member having surfaces adjacent said punch and said die blcok, whereby cutting of one sheet of material occurs by cooperation between said punch and said face of said intermediate member adjacent said punch, and cutting of said second sheet of material occurs by reason of coaction between said face of said intermediate member adjacent said die block and said die block.
Claim 3
Dependent Claim
71 words
The punch apparatus of claim 1 wherein said punch has a face adjacent said intermediate member which is spherical, said face Of said intermediate member adjacent said die block also being spherical, said spherical surface of said punch cooperating with a planar surface of said intermediate member adjacent said punch, and said spherical surface of said intermediate member cooperating with a planar surface of said die block adjacent said intermediate member.
Claim 4
Dependent Claim
38 words
The punch apparatus of claim 1 wherein said punch has a face adjacent said intermediate member which is spherical, said die block has a spherical surface adjacent said intermediate member, said surfaces of said intermediate member being planar.
Claim 5
Dependent Claim
38 words
The punch apparatus of claim 1 in which said punch and die block are tubular, each with planar surfaces adjacent said intermediate member, said intermediate member having a spherical surface adjacent both said punch and said die block.
Claim 6
Dependent Claim
47 words
The punch of claim 1 wherein one of the punch-intermediate member surfaces is planar and the other is spherical, one of the intermediate member-die block surfaces is planar and the other is planar, and in which said spherical surfaces have a higher hardness than said planar surfaces.
Claim 7
Dependent Claim
53 words
The apparatus of claim 1 in which said intermediate member surface adjacent said punch has an opening of diameter equal to the diameter of said punch, said intermediate member surface adjacent said die block forms a punching edge equal in size to an opening in said die block surface adjacent said intermediate member.
Claim 8
Dependent Claim
18 words
The punching apparatus of claim 6 in which said punch and said intermediate member have flexible releasing rings.
Claim 9
Dependent Claim
35 words
The apparatus of claim 1 in which said punch and die block are tubular with bevelled cutting edges, said intermediate member having planar surfaces against which said punch and die block are pressed for cutting.
Claim 10
Dependent Claim
33 words
The apparatus of claim 1 in which said intermediate member is attached to a tool body by an arm, in which said intermediate member is secured to said arm by a flexible member.
Claim 11
Dependent Claim
24 words
The apparatus of claim 1 in which said punch, die block and intermediate member have openings for an air supply to remove waste material.
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) | 1977-07-15 | 1978-01-14 | 1978-07-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-07-15 | 1982-01-14 | 1982-07-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-07-15 | 1986-01-14 | 1986-07-16 | $7700.00 | Window Closed / Lapsed |