MLchartDataset catalogue

Patent · US10888937B2 · B2 · US

Apparatus and method for severing and inserting collated t-nuts

(11) Publication number
US10888937B2
(21) Application number
13/313,657
(22) Filing date
2011-12-07
(30) Priority date
2011-01-17
(43) Publication date
2021-01-12
(45) Date of grant
2021-01-12
(51) IPC
B21K 1/64; B23D 33/02; B23P 19/00; B23P 19/06; F16B 27/00; F16B 37/02; F16B 37/04
(52) CPC
  • B23D Planing; slotting; shearing; broaching; sawing; filing; scraping; like operations for working metal by removing material, not otherwise provided for: 33/025, 33/02
  • B21K Making forged or pressed metal products, e.g. horse-shoes, rivets, bolts or wheels: 1/64
  • B23P Metal-working not otherwise provided for; combined operations; universal machine tools: 19/001, 19/062
  • F16B Devices for fastening or securing constructional elements or machine parts together, e.g. nails, bolts, circlips, clamps, clips or wedges; joints or jointing: 27/00, 37/02, 37/04
  • Y10T Technical subjects covered by former us classification: 29/49799, 29/49947, 29/5198, 83/647
(73) Assignee
Stafast Products Inc
(72) Inventors
Jonathan Wayne Dieter; Stephen R. Selle
(54) Title
Apparatus and method for severing and inserting collated t-nuts
(57) Abstract

A continuous strip of T-Nuts formed on a common strip of metal. Each T-Nut of the strip of T-Nuts is integrally connected to the next adjacent T-Nut by carry tabs. The carry tabs can be frangible themselves or contain a frangible portion. Each T-Nut includes a cylindrical bore therein and a threaded interior. A mechanism feeds and severs the endmost T-Nut in endwise fashion. The mechanism to feed and sever the endmost T-Nut includes a cutting blade positioned vertically below the frangible portion of the carry tab. A shearing ram having a guide positioned axially in line with the cylindrical bore in the endmost T-Nut is adapted to move vertically from an upper to a lower position to engage the cutting blade with the frangible portion and sever the endmost T-Nut.

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Claims (18)

  1. An apparatus for severing a T-Nut in combination with a common metal strip of T-Nuts having a plurality of T-Nuts one of which is an endmost T-Nut, comprising: each of said T-Nuts of said strip of T-Nuts being integrally formed with said common metal strip and connected together at a centrally located frangible portion with a next adjacent T-Nut; each of said centrally located frangible portions of said common metal strip of T-Nuts is a weakened portion; each of said T-Nuts includes a bore therein and a prong; a mechanism to feed and sever said endmost T-Nut from said common metal strip of T-Nuts; said mechanism includes a positioning member, an advancement finger, and said endmost T-Nut being in engagement with said positioning member; said positioning member is an abutment; said advancement finger of said mechanism includes a notched surface, said prong includes a surface which is reciprocally shaped with respect to said notched surface of said advancement finger; said notched surface of said advancement finger engages said reciprocally shaped surface of said prong driving said common metal strip of T-Nuts into said engagement with said abutment; a cutting blade positioned vertically below the position of said centrally located frangible portion when said endmost T-Nut is in engagement with said positioning member; and, a shearing ram having a guide finger positioned axially in line with said bore in said endmost T-Nut and adapted to move said common metal strip of T-Nuts including said endmost T-Nut vertically from an upper to a lower position to engage said centrally located frangible portion of said endmost T-Nut with said cutting blade and sever said endmost T-Nut from said common metal strip of T-Nuts.
  2. The apparatus of claim 1, wherein said bore is cylindrical.
  3. The apparatus of claim 1, wherein said bore is partially threaded.
  4. The apparatus of claim 1, wherein said bore is fully threaded.
  5. The apparatus of claim 1, wherein said bore includes a counterbore.
  6. The apparatus of claim 1, further comprising: said guide finger resides in said cylindrical bore of said endmost T-Nut to carry said severed endmost T-Nut to another position separated from said strip of T-Nuts.
  7. The apparatus of claim 1, wherein said weakened centrally located frangible portion includes a slot therein.
  8. The apparatus of claim 7, further comprising: said centrally located frangible portion includes a top surface, bottom surface, front side surface, and back side surface; and, said slot extends in said top surface, said front side surface, and said back side surface of said centrally located frangible portion.
  9. An apparatus for severing and inserting a T-Nut in combination with: a common metal strip of T-Nuts having a plurality of T-Nuts one of which is an endmost T-Nut and one of which is a penultimate T-Nut adjacent to said endmost T-Nut; and, a substrate, said substrate includes an opening therein, said apparatus severs said endmost T-Nut from said common metal strip and inserts said endmost T-Nut into said opening in said substrate; comprising: each of said T-Nuts of said strip of T-Nuts being integrally formed with said common metal strip and connected together at a centrally located frangible portion with a next adjacent T-Nut; each of said centrally located frangible portions of said common metal strip of T-Nuts is a weakened portion; each of said T-Nuts includes a bore therein and a prong; a mechanism; said mechanism includes an advancement finger, a positioning member, and said endmost T-Nut being in engagement with said positioning member; said positioning member is an abutment; said advancement finger includes notched shaped surfaces; said prong includes surfaces which are reciprocally shaped surfaces with respect to said notched shaped surfaces of said advancement finger; said notched surfaces of said advancement finger engage said reciprocally shaped surfaces of said prong driving said common metal strip of T-Nuts into said engagement with said abutment; a cutting blade positioned vertically below the position of said centrally located frangible portion of said endmost T-Nut when said endmost T-Nut is in engagement with said positioning member; a shearing ram having a guide finger positioned axially in line with said bore of said endmost T-Nut and adapted to move said common metal strip of T-Nuts vertically from an upper to a lower position to engage said centrally located frangible portion of said endmost T-Nut with said cutting blade and sever said endmost T-Nut from said common metal strip of T-Nuts; said guide finger resides in said bore of said endmost T-Nut to carry said severed endmost T-Nut to said opening in said substrate where said T-Nut is to reside to perform a support function; a guide mechanism located below said end of said strip of T-Nuts, said guide mechanism includes a support wall surface to engage said penultimate T-Nut of said common metal strip so as to maintain the integrity of said penultimate T-Nut with said common metal strip until said endmost T-Nut is severed from said common metal strip; and, a piston for moving said shearing ram vertically between said upper and said lower positions.
  10. The apparatus of claim 9 wherein said bore is cylindrical.
  11. The apparatus of claim 10 wherein said bore is partially threaded.
  12. The apparatus of claim 10, wherein said bore is fully threaded.
  13. The apparatus of claim 10, wherein said bore includes a counterbore.
  14. The apparatus of claim 9, wherein said weakened centrally located frangible portion includes a slot therein.
  15. The apparatus of claim 14, further comprising: said centrally located frangible portion includes a top surface, bottom surface, front side surface, and back side surface; and, said slot extends in said top surface, said front side surface, and said back side surface of said centrally located frangible portion.
  16. The apparatus of claim 9, wherein said bore includes a counterbore.
  17. The apparatus of claim 9, wherein said bore is partially threaded.
  18. The apparatus of claim 9, further comprising: said guide mechanism includes at least one guide cylinder therein receiving said penultimate T-Nut until said penultimate T-Nut is severed from said common metal strip.

Description

This application claims priority to and the benefit of copending U.S. Provisional Patent Application Ser. No. 61/433,300 filed Jan. 17, 2011. U.S. Provisional Patent Application Ser. No. 61/433,300 filed Jan. 17, 2011 is incorporated in its entirety by reference hereto.

The invention is in the field of fasteners.

Existing collated fasteners are manufactured and then collated using a secondary process. One process uses a progressive die method to cut the T-Nuts off from the steel or stainless steel strip and then tap the threads in a secondary process. The secondary process commonly uses glue to hold the fasteners together for later dispensation. Fasteners which are glued together include staples, nails, screws, clips, etc.

One known method for collating T-Nuts includes adhering the T-Nuts to tape and rolling them into a coil during a secondary operation. FIG. 13 is a view 1300 illustrating a prior art backing strip 1301 securing individual T- Nuts 1302 thereto by means of adhesive as illustrated in U.S. Pat. No. 5,214,843. FIG. 13A is a view 1300 A illustrating a prior art device illustrated in U.S. Pat. No. 5,214,843 with wires 1304, 1305 welded to individual T- Nuts 1302.

Presently known methods of collating T-Nuts using tape have several disadvantages. First, T-Nuts can easily become detached or ‘unstuck’ from the tape. Factors such as temperature and humidity can have an adverse reaction on the adhesive properties of tape. Second, taped T-Nuts on a coil do not withstand impact well. Common forces involved with activities such as shipping and/or handling can cause T-Nuts to detach.

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Record as JSON 
{
  "publication_number": "US10888937B2",
  "country": "US",
  "kind": "B2",
  "title": "Apparatus and method for severing and inserting collated t-nuts",
  "abstract": "A continuous strip of T-Nuts formed on a common strip of metal. Each T-Nut of the strip of T-Nuts is integrally connected to the next adjacent T-Nut by carry tabs. The carry tabs can be frangible themselves or contain a frangible portion. Each T-Nut includes a cylindrical bore therein and a threaded interior. A mechanism feeds and severs the endmost T-Nut in endwise fashion. The mechanism to feed and sever the endmost T-Nut includes a cutting blade positioned vertically below the frangible portion of the carry tab. A shearing ram having a guide positioned axially in line with the cylindrical bore in the endmost T-Nut is adapted to move vertically from an upper to a lower position to engage the cutting blade with the frangible portion and sever the endmost T-Nut.",
  "claims": [
    "1. An apparatus for severing a T-Nut in combination with a common metal strip of T-Nuts having a plurality of T-Nuts one of which is an endmost T-Nut, comprising: each of said T-Nuts of said strip of T-Nuts being integrally formed with said common metal strip and connected together at a centrally located frangible portion with a next adjacent T-Nut; each of said centrally located frangible portions of said common metal strip of T-Nuts is a weakened portion; each of said T-Nuts includes a bore therein and a prong; a mechanism to feed and sever said endmost T-Nut from said common metal strip of T-Nuts; said mechanism includes a positioning member, an advancement finger, and said endmost T-Nut being in engagement with said positioning member; said positioning member is an abutment; said advancement finger of said mechanism includes a notched surface, said prong includes a surface which is reciprocally shaped with respect to said notched surface of said advancement finger; said notched surface of said advancement finger engages said reciprocally shaped surface of said prong driving said common metal strip of T-Nuts into said engagement with said abutment; a cutting blade positioned vertically below the position of said centrally located frangible portion when said endmost T-Nut is in engagement with said positioning member; and, a shearing ram having a guide finger positioned axially in line with said bore in said endmost T-Nut and adapted to move said common metal strip of T-Nuts including said endmost T-Nut vertically from an upper to a lower position to engage said centrally located frangible portion of said endmost T-Nut with said cutting blade and sever said endmost T-Nut from said common metal strip of T-Nuts.",
    "2. The apparatus of claim 1, wherein said bore is cylindrical.",
    "3. The apparatus of claim 1, wherein said bore is partially threaded.",
    "4. The apparatus of claim 1, wherein said bore is fully threaded.",
    "5. The apparatus of claim 1, wherein said bore includes a counterbore.",
    "6. The apparatus of claim 1, further comprising: said guide finger resides in said cylindrical bore of said endmost T-Nut to carry said severed endmost T-Nut to another position separated from said strip of T-Nuts.",
    "7. The apparatus of claim 1, wherein said weakened centrally located frangible portion includes a slot therein.",
    "8. The apparatus of claim 7, further comprising: said centrally located frangible portion includes a top surface, bottom surface, front side surface, and back side surface; and, said slot extends in said top surface, said front side surface, and said back side surface of said centrally located frangible portion.",
    "9. An apparatus for severing and inserting a T-Nut in combination with: a common metal strip of T-Nuts having a plurality of T-Nuts one of which is an endmost T-Nut and one of which is a penultimate T-Nut adjacent to said endmost T-Nut; and, a substrate, said substrate includes an opening therein, said apparatus severs said endmost T-Nut from said common metal strip and inserts said endmost T-Nut into said opening in said substrate; comprising: each of said T-Nuts of said strip of T-Nuts being integrally formed with said common metal strip and connected together at a centrally located frangible portion with a next adjacent T-Nut; each of said centrally located frangible portions of said common metal strip of T-Nuts is a weakened portion; each of said T-Nuts includes a bore therein and a prong; a mechanism; said mechanism includes an advancement finger, a positioning member, and said endmost T-Nut being in engagement with said positioning member; said positioning member is an abutment; said advancement finger includes notched shaped surfaces; said prong includes surfaces which are reciprocally shaped surfaces with respect to said notched shaped surfaces of said advancement finger; said notched surfaces of said advancement finger engage said reciprocally shaped surfaces of said prong driving said common metal strip of T-Nuts into said engagement with said abutment; a cutting blade positioned vertically below the position of said centrally located frangible portion of said endmost T-Nut when said endmost T-Nut is in engagement with said positioning member; a shearing ram having a guide finger positioned axially in line with said bore of said endmost T-Nut and adapted to move said common metal strip of T-Nuts vertically from an upper to a lower position to engage said centrally located frangible portion of said endmost T-Nut with said cutting blade and sever said endmost T-Nut from said common metal strip of T-Nuts; said guide finger resides in said bore of said endmost T-Nut to carry said severed endmost T-Nut to said opening in said substrate where said T-Nut is to reside to perform a support function; a guide mechanism located below said end of said strip of T-Nuts, said guide mechanism includes a support wall surface to engage said penultimate T-Nut of said common metal strip so as to maintain the integrity of said penultimate T-Nut with said common metal strip until said endmost T-Nut is severed from said common metal strip; and, a piston for moving said shearing ram vertically between said upper and said lower positions.",
    "10. The apparatus of claim 9 wherein said bore is cylindrical.",
    "11. The apparatus of claim 10 wherein said bore is partially threaded.",
    "12. The apparatus of claim 10, wherein said bore is fully threaded.",
    "13. The apparatus of claim 10, wherein said bore includes a counterbore.",
    "14. The apparatus of claim 9, wherein said weakened centrally located frangible portion includes a slot therein.",
    "15. The apparatus of claim 14, further comprising: said centrally located frangible portion includes a top surface, bottom surface, front side surface, and back side surface; and, said slot extends in said top surface, said front side surface, and said back side surface of said centrally located frangible portion.",
    "16. The apparatus of claim 9, wherein said bore includes a counterbore.",
    "17. The apparatus of claim 9, wherein said bore is partially threaded.",
    "18. The apparatus of claim 9, further comprising: said guide mechanism includes at least one guide cylinder therein receiving said penultimate T-Nut until said penultimate T-Nut is severed from said common metal strip."
  ],
  "description_excerpt": "This application claims priority to and the benefit of copending U.S. Provisional Patent Application Ser. No. 61/433,300 filed Jan. 17, 2011. U.S. Provisional Patent Application Ser. No. 61/433,300 filed Jan. 17, 2011 is incorporated in its entirety by reference hereto.\n\nThe invention is in the field of fasteners.\n\nExisting collated fasteners are manufactured and then collated using a secondary process. One process uses a progressive die method to cut the T-Nuts off from the steel or stainless steel strip and then tap the threads in a secondary process. The secondary process commonly uses glue to hold the fasteners together for later dispensation. Fasteners which are glued together include staples, nails, screws, clips, etc.\n\nOne known method for collating T-Nuts includes adhering the T-Nuts to tape and rolling them into a coil during a secondary operation. FIG. 13 is a view 1300 illustrating a prior art backing strip 1301 securing individual T- Nuts 1302 thereto by means of adhesive as illustrated in U.S. Pat. No. 5,214,843. FIG. 13A is a view 1300 A illustrating a prior art device illustrated in U.S. Pat. No. 5,214,843 with wires 1304, 1305 welded to individual T- Nuts 1302.\n\nPresently known methods of collating T-Nuts using tape have several disadvantages. First, T-Nuts can easily become detached or ‘unstuck’ from the tape. Factors such as temperature and humidity can have an adverse reaction on the adhesive properties of tape. Second, taped T-Nuts on a coil do not withstand impact well. Common forces involved with activities such as shipping and/or handling can cause T-Nuts to detach.",
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  "assignees": [
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  "inventors": [
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  "filing_date": "2011-12-07",
  "publication_date": "2021-01-12",
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  "priority_date": "2011-01-17",
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