EP4166031A1 - Schuhnagel mit einer entenschnabelspitze - Google Patents

Schuhnagel mit einer entenschnabelspitze Download PDF

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Publication number
EP4166031A1
EP4166031A1 EP22201570.3A EP22201570A EP4166031A1 EP 4166031 A1 EP4166031 A1 EP 4166031A1 EP 22201570 A EP22201570 A EP 22201570A EP 4166031 A1 EP4166031 A1 EP 4166031A1
Authority
EP
European Patent Office
Prior art keywords
tip
nail
footwear
cutting edges
shank
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP22201570.3A
Other languages
English (en)
French (fr)
Inventor
Sergio Brizzi
Vito Conte
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Metallurgica Lombarda Srl
Original Assignee
Metallurgica Lombarda Srl
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Metallurgica Lombarda Srl filed Critical Metallurgica Lombarda Srl
Publication of EP4166031A1 publication Critical patent/EP4166031A1/de
Withdrawn legal-status Critical Current

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Classifications

    • A—HUMAN NECESSITIES
    • A43—FOOTWEAR
    • A43B—CHARACTERISTIC FEATURES OF FOOTWEAR; PARTS OF FOOTWEAR
    • A43B23/00—Uppers; Boot legs; Stiffeners; Other single parts of footwear
    • A43B23/20—Nails, pegs, pins, clamps, or tacks, for footwear

Definitions

  • the present invention relates to a nail for footwear and the like with an optimised configuration for the joining of the upper to the insole.
  • Footwear in general is composed of several components, the number and complexity whereof vary according to type and uses.
  • the main components of a shoe are the upper and the sole, which are also the externally visible components.
  • the upper is the higher part of shoes. It can be in leather, hide or technical materials and is formed by a single piece or several pieces sewn one to the other. Its function is to protect and wrap the foot, ensuring stability and hold.
  • the sole is instead the external part in contact with the ground. It can be in various materials, including rubber, wood or hide, and has the function of ensuring traction and grip.
  • Footwear generally also has insoles, i.e. thin linings placed inside the shoe that ensure more comfortable walking and better posture.
  • Insoles come in different sizes and materials depending on the type of shoe and are present, in different ways, both in classic lace-up shoes and in tennis shoes, trainers and the like.
  • the head must have a diameter such as to minimise the risk of the material of the upper being torn off, compatibly with the characteristics of the machines used.
  • Tacks currently in use have a head with maximum diameter of 2.8 mm, normally around 2.7 mm
  • Known tacks generally have a "pyramid" type tip, with generally square section, with four edges or corners starting from the end of the shank. This type of tack, although widely used in the industry, is not applicable to all types of footwear, which have components of very different materials and thicknesses.
  • trainers which are shoes characterised by a rubber sole, are made of materials (including those of the insole) that are softer and more flexible with respect to traditional shoes, which do not allow the use of traditional nailing systems.
  • materials including those of the insole
  • different joining mechanisms are normally used, including glues and adhesives, which result in an end product with inferior functional and durability characteristics.
  • the object of the present invention is therefore to provide a nail for footwear or tack that is able to overcome the disadvantages of the prior art.
  • an object of the present invention is to provide a nail for footwear having a tip with flexibility such that it makes the nailing process easier, at the same time improving the characteristics of joining and hold between the materials.
  • Another object of the present invention is to provide a nail for footwear that can be applied to various types of footwear, including in particular trainers and the like.
  • the present invention relates to a nail (1) for footwear, suitable for joining turned flaps of an upper (11) to an insole (21) of a footwear item, comprising a flat cylindrical head (5), a shank (7) and a tip (9) with section tapering from the shank (7) as far as a penetration tip, wherein the total length of the nail (1) is comprised between 6 and 12 mm and said tip (9) is provided with two cutting edges (91, 93) and with two rounded lateral surfaces (92, 94) extending between said cutting edges (91, 93), the cross section of said tip (9) having a substantially oval shape with two sharp edges at the cutting edges (91, 93) and symmetrical with respect to the plane passing through said cutting edges (91, 93).
  • Figure 1 schematically shows a nail for footwear 1 according to the invention after being driven into an insole 21 to connect it to the turned flaps of the upper 11 (with optional lining) and after being driven against a last 31. After application, the tip of the nail 1 is almost completely bent 1 so as to hook the insole 21 and keep it joined to the upper 11 thanks to the head 5. The shank 7 of the nail after application instead remains straight.
  • the nail for footwear 1 Prior to use, the nail for footwear 1 has a configuration like that shown in Figures 2 and 3 and conventionally has a circular flat head 5, a shank 7 and a tip 9.
  • the tips for these types of nails usually have a pyramidal section that entails a series of disadvantages and limitations both during application and during common use of the shoe, due to the loads and stresses involved.
  • the essential characteristic of the nail 1 according to the invention is the presence of a tip 9 defined as "duckbill", i.e. with a substantially more flattened shape, shown in the section of Fig. 3A taken along line A-A of Fig. 3 .
  • the section of tip 9 has an ovalized shape provided with two cutting edges 91 and 93 and two rounded joining surfaces 92 and 94.
  • Figure 2 is a side elevation view of the nail showing frontally the rounded surface 92, while Fig. 3 shows the same nail 1 of Figure 2 rotated by 90°, in which the cutting edge 91 and half of the two rounded surfaces 92 and 94 can be seen.
  • the tip 9 thus has a duckbill configuration that starts from the shank 7 with a section like that shown in Figure 3a and ends in a penetration tip.
  • the smaller section of the tip of nail 1 has in fact better penetration in the materials but above all has a lower modulus of flexural strength and can therefore bend more easily (along the smaller axis of the oval of the section of Fig. 3a ).
  • nail 1 normally have a total length that varies from 5 to 12 mm
  • nail 1 according to the invention has advantageously a length of the tip of 4 mm, irrespective of the total length of the nail, which can vary from 6 to 12 mm.
  • the length of the shank 7 of the nail 1 can thus vary between 2 and 8 millimetres, with a diameter comprised within the range between 1 and 1.2 mm.
  • a further innovative and advantageous feature of nail 1 is represented by the diameter of the head.
  • Standard nails normally applied in the industry have a maximum diameter of 2.8 mm, normally around 2.7.
  • nail 1 has a head with diameter greater than 2.8 mm, and even more advantageously of 3 mm. This configuration further optimises the hold and minimises the risk of the material of the upper being torn off.
  • a nail for footwear 1 thus described has functional features able to overcome the disadvantages of products currently in circulation, allowing less wear.
  • a nail 1 provided with a tip 9 with the features described above allows use on various types of footwear, also on those in which, to date, the joining between upper and insole cannot be achieved by nailing or is extremely difficult and not very reliable.
  • the nail or tack 1 having the features of the appended claims can be applied in an innovative manner on shoes such as trainers and the like.

Landscapes

  • Footwear And Its Accessory, Manufacturing Method And Apparatuses (AREA)
EP22201570.3A 2021-10-14 2022-10-14 Schuhnagel mit einer entenschnabelspitze Withdrawn EP4166031A1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT102021000026345A IT202100026345A1 (it) 2021-10-14 2021-10-14 Chiodo per calzature con punta a becco d’anatra

Publications (1)

Publication Number Publication Date
EP4166031A1 true EP4166031A1 (de) 2023-04-19

Family

ID=79019027

Family Applications (1)

Application Number Title Priority Date Filing Date
EP22201570.3A Withdrawn EP4166031A1 (de) 2021-10-14 2022-10-14 Schuhnagel mit einer entenschnabelspitze

Country Status (2)

Country Link
EP (1) EP4166031A1 (de)
IT (1) IT202100026345A1 (de)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH88903A (de) * 1920-09-10 1921-04-01 Gustav Hugenschmidt Suter Sohlenstift.
DE471134C (de) * 1926-06-04 1929-02-06 Friedrich Wilhelm Von Dreusche Schuhtack
FR928142A (fr) * 1946-05-11 1947-11-19 Clou alpin

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH88903A (de) * 1920-09-10 1921-04-01 Gustav Hugenschmidt Suter Sohlenstift.
DE471134C (de) * 1926-06-04 1929-02-06 Friedrich Wilhelm Von Dreusche Schuhtack
FR928142A (fr) * 1946-05-11 1947-11-19 Clou alpin

Also Published As

Publication number Publication date
IT202100026345A1 (it) 2023-04-14

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