Spiked plate and relative plate press machine and process for working natural leather
AssigneeConceria Nuvolari SRL
InventorSara Santori
Life of this patent
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Abstract
Spiked plate (100) having an operating surface provided with a plurality of conical spikes (200), configured to penetrate into an inner side of a full grain natural leather having a thickness t and make blind holes in said inner side of the full grain natural leather, wherein:—a base diameter d of the conical spikes (200) ranges from 33% to 100% of the thickness t, whereby 0.33−t≤d≤t,—a height h of the conical spikes (200) ranges from 70% to 110% of the thickness t, whereby 0.7−t≤h≤t, and—a minimum distance D between the conical spikes (200) on the operating surface of the spiked plate (100) ranges from 200% to 430% of the thickness t, whereby 2−t≤D≤4.3·t.
Claims13
Process for working natural leather comprising:
- piercing a sheet of full grain natural leather, the sheet of full grain natural leather having an inner side, an outer side, and a thickness t ranging from 0.8 millimetres to 1.5 millimetres, through a spiked plate having an operating surface provided with a plurality of conical spikes, the conical spikes configured to penetrate said inner side of said full grain natural leather and to make blind holes on said inner side of said full grain natural leather, wherein:
- a base diameter d of the conical spikes ranges from 33% to 100% of the thickness t, whereby 0.33·t≤d≤t,
- a height h of the conical spikes ranges from 70% to 110% of the thickness t, whereby 0.7·t≤h≤t, and
- a minimum distance D between the conical spikes on the operating surface of the spiked plate ranges from 200% to 430% of the thickness t, whereby 2·t≤D≤4.3·t,
- causing the operating surface of the spiked plate to press the inner side of the full grain natural leather for a number of times ranging from one to three, for a press duration ranging from 1 second to 4 seconds, with a pressure ranging from 15 to 60 atmospheres, and wherein the spiked plate is at a temperature ranging from 30° C. to 110° C., whereby the blind holes made by the conical spikes on the inner side of the full grain natural leather keep the overall aesthetic of the outer side of the full grain natural leather unchanged, and improve breathability from the inner side to the outer side of said full grain natural leather;
- and
- incorporating at least part of said sheet of full grain natural leather in at least one leather product having an inner surface that is not visible during normal use of said at least one leather product, and an outer surface that is visible during the normal use of said at least one leather product, wherein said inner surface corresponds to the inner side of said at least part of said sheet of full grain natural leather and said outer surface corresponds to the outer side of said at least part of said sheet of full grain natural leather.
Spiked plate having an operating surface provided with a plurality of conical spikes, configured to penetrate into a full grain natural leather, said sheet of full grain natural leather having an inner side, an outer side, and a thickness t ranging from 0.8 millimetres to 1.5 millimetres, and to make blind holes in said inner side of the full grain natural leather, characterised in that:
- a base diameter d of the conical spikes ranges from 33% to 100% of the thickness t, whereby 0.33·t≤d≤t,
- a height h of the conical spikes ranges from 70% to 110% of the thickness t, whereby 0.7·t≤h≤t, and
- a minimum distance D between the conical spikes on the operating surface of the spiked plate ranges from 200% to 430% of the thickness t, whereby 2·t≤D≤4.3·t;
- and
- wherein at least part of said sheet of full grain natural leather is incorporated in at least one leather product having an inner surface that is not visible during normal use of said at least one leather product, and an outer surface that is visible during the normal use of said at least one leather product, wherein said inner surface corresponds to the inner side of said at least part of said sheet of full grain natural leather and said outer surface corresponds to the outer side of said at least part of said sheet of full grain natural leather.
Plate press machine configured to execute the process for working natural leather comprising:
- piercing a sheet of full grain natural leather, the sheet of full grain natural leather having an inner side, an outer side, and a thickness t ranging from 0.8 millimetres to 1.5 millimetres, through a spiked plate;
- wherein the spiked plate has an operating surface provided with a plurality of conical spikes, the conical spikes configured to penetrate said inner side of said full grain natural leather and to make blind holes on said inner side of said full grain natural leather, wherein:
- a base diameter d of the conical spikes ranges from 33% to 100% of the thickness t, whereby 0.33·t≤d≤t,
- a height h of the conical spikes ranges from 70% to 110% of the thickness t, whereby 0.7·t≤h≤t, and
- a minimum distance D between the conical spikes on the operating surface of the spiked plate ranges from 200% to 430% of the thickness t, whereby 2·t≤D≤4.3·t;
- and
- wherein the process causes the operating surface of the spiked plate to press the inner side of the full grain natural leather for a number of times ranging from one to three, for a press duration ranging from 1 second to 4 seconds, with a pressure ranging from 15 to 60 atmospheres, and wherein the spiked plate is at a temperature ranging from 30° C. to 110° C., whereby the blind holes made by the conical spikes on the inner side of the full grain natural leather keep the overall aesthetic of the outer side of the full grain natural leather unchanged and improve breathability from the inner side to the outer side of said full grain natural leather;
- and
- wherein the process incorporates at least part of said sheet of full grain natural leather in at least one leather product having an inner surface that is not visible during normal use of said at least one leather product, and an outer surface that is visible during the normal use of said at least one leather product, wherein said inner surface corresponds to the inner side of said at least part of said sheet of full grain natural leather and said outer surface corresponds to the outer side of said at least part of said sheet of full grain natural leather.
Dependencies are inferred from the claim text.