# US 2008/0184859 A1 · Base For A Paper Punch and Method of Forming Same > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2008/0184859 A1 - Document ID: US20080184859A1 - Status: Published application - Kind: A1 - Application number: 11/669,990 - Filed: 2007-02-01 - Published: 2008-08-07 - Earliest claimed: 2007-02-01 - Assignees: Lee Tack Plastic & Metal Manufactory Ltd. - Inventors: Kwok Ki Stephen CHAN - Web page: https://patentgrep.com/patent/US20080184859A1 ## CPC - B26F 1/36: Punching or perforating pliers - B26D 3/10: Making cuts of other than simple rectilinear form (cutting-out B26F) - Y10T 83/222: With receptacle or support for cut product - Y10T 83/9425: Tool pair - Y10T 83/9476: Tool is single element with continuous cutting edge [e.g., punch, etc.] - B26F: PERFORATING; PUNCHING; CUTTING-OUT; STAMPING-OUT; SEVERING BY MEANS OTHER THAN CUTTING (marking-out, perforating or making buttonholes A41H25/00; shoemaking A43D; surgery A61B; punching metal B21D; drilling metal B23B; cutting of metal by applying heat locally, e.g. flame cutting, B23K; cutting by abrasive fluid jets B24C5/02; details common to machines for severing B26D; drilling wood B27C; drilling stone B28D; working of plastics or substances in a plastic state B29; making boxes, cartons, envelopes or bags, of paper or similarly worked materials, e.g. metal foil, B31B; of glass C03B; of leather C14B; of textile materials D06H; for light guides G02B6/25; of tickets G07B) - B26D: CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING (for growing crops or plants A01D, A01G; for fodder or straw A01F; for bulk butter A01J; for dough A21C; slaughtering A22B; for tobacco, cigars or cigarettes A24; marking-out, perforating or making buttonholes A41H25/00; manufacturing footwear A43D; brushmaking A46D; surgery A61B; disintegrating, mincing or shredding in general B02C; cutting wire, making pins or nails B21F, B21G; of the kind used formetal B23; cutting by abrasive fluid jets B24C5/02; hand-held cutting tools B26B; perforating, cutting-out, stamping-out or punching, or severing by means other than cutting B26F; for wood B27; for stone B28D; working of plastics or substances in a plastic state B29; making boxes, cartons, envelopes or bags, of paper or similarly worked materials, e.g. metal foil, B31B; article or web delivery apparatus incorporating cutting or line-perforating devices B65H35/00; for leather or upholstery B68, C14B; for glass C03B; making matches C06F; for peat C10F; for sugar C13B45/00; for textile materials D06H; civil engineering, building, mining, see Section E; for light guides G02B6/25; cutting processed photographic material G03D15/04) - Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION ## Abstract A method of forming a base (118) for a paper punch (154) is disclosed as including the steps of (a) providing a cast iron core (102) with a wall (104) and a plate (106) with a hole (108); (b) providing two generally U-shaped cast iron plates (110); (c) positioning the plates (110) spaced apart from and on opposite sides of the core (102); and (d) insert-moulding the core (102) and plates (106) with a plastics material, e.g. ABS. ## Claims ### Claim 1 A method of forming a base for a paper punch, including the steps of: (a) providing a core part with a wall member and a plate with at least one hole; (b) providing at least two generally U-shaped plate members; and (c) insert-moulding at least said core part with a plastics material. ### Claim 2 (depends on 1) A method according to claim 1 wherein in said step (c), said U-shaped plate members are simultaneously insert-moulded with said plastics materials. ### Claim 3 (depends on 1) A method according to claim 1 further including a step (d) of cutting at least part of said wall member to form a slot. ### Claim 4 (depends on 3) A method according to claim 3 wherein each said U-shaped plate members has two arm members spaced apart from each other by a gap. ### Claim 5 (depends on 4) A method according to claim 4 wherein said slot formed in said step (e) forms a common opening with said gaps of said U-shaped plate members. ### Claim 6 (depends on 1) A method according to claim 1 wherein said plastics material is acrylonitrile-butadiene-styrene terpolymer. ### Claim 7 (depends on 1) A method according to claim 1 wherein said core part and said U-shaped plate members are made of a material different from said plastics material. ### Claim 8 (depends on 1) A method according to claim 1 wherein said core part is made of a metal or metal alloy. ### Claim 9 (depends on 8) A method according to claim 8 wherein said core part is made of cast iron. ### Claim 10 (depends on 1) A method according to claim 1 wherein said U-shaped plate members are made of a metal or metal alloy. ### Claim 11 (depends on 10) A method according to claim 10 wherein said U shaped plate members are made of cast iron. ### Claim 12 (depends on 1) A method according to claim 1 wherein said U-shaped plate members are fully embedded within said plastics material. ### Claim 13 (depends on 1) A method according to claim 1 wherein said U-shaped plate members are partly embedded within said plastics material. ### Claim 14 (depends on 1, 2) A method according to claim 1 or 2 wherein said core part and said U-shaped plate members are formed integrally with each other. ### Claim 15 (depends on 1) A method according to claim 1 wherein said U-shaped plate members are fixedly engaged with said base by interference fit. ### Claim 16 A base for a paper punch, including: a body part fixedly engaged with a core part with a wall member and a plate with at least one hole; and two generally U-shaped plate members spaced apart from and on opposite sides of said core part; wherein said core part and plate members are made of a material different from that with which said body part is made. ### Claim 17 (depends on 16) A base according to claim 16 wherein said body part is made of a plastics material. ### Claim 18 (depends on 17) A base according to claim 17 wherein said plastics material is acrylonitrile-butadiene-styrene terpolymer. ### Claim 19 (depends on 16) A base according to claim 16 wherein said core part is made of a metal or metal alloy. ### Claim 20 (depends on 19) A base according to claim 19 wherein said core part is made of cast iron. ### Claim 21 (depends on 16) A base according to claim 16 wherein said U-shaped plate members are made of a metal or metal alloy. ### Claim 22 (depends on 21) A base according to claim 21 wherein said U-shaped plate members are made of cast iron. ### Claim 23 (depends on 16) A base according to claim 16 wherein said core part is fully contained within said body part. ### Claim 24 (depends on 16) A base according to claim 16 wherein said U-shaped plate members are fully embedded within said plastics material. ### Claim 25 (depends on 16) A base according to claim 16 wherein said U-shaped plate members are partly embedded within said plastics material. ### Claim 26 (depends on 1) A paper punch including a die and a base formed by a method according to claim 1. ### Claim 27 (depends on 16) A paper punch including a die and a base according to claim 16.