US344404A - Knife for leather-splitting machines - Google Patents
Knife for leather-splitting machines Download PDFInfo
- Publication number
- US344404A US344404A US344404DA US344404A US 344404 A US344404 A US 344404A US 344404D A US344404D A US 344404DA US 344404 A US344404 A US 344404A
- Authority
- US
- United States
- Prior art keywords
- knife
- leather
- faces
- knives
- splitting machines
- 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.)
- Expired - Lifetime
Links
- 239000010985 leather Substances 0.000 description 4
- 238000005496 tempering Methods 0.000 description 4
- 210000002105 Tongue Anatomy 0.000 description 2
- 201000002372 amelogenesis imperfecta type 1G Diseases 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 238000005096 rolling process Methods 0.000 description 2
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C14—SKINS; HIDES; PELTS; LEATHER
- C14B—MECHANICAL TREATMENT OR PROCESSING OF SKINS, HIDES OR LEATHER IN GENERAL; PELT-SHEARING MACHINES; INTESTINE-SPLITTING MACHINES
- C14B1/00—Manufacture of leather; Machines or devices therefor
- C14B1/02—Fleshing, unhairing, samming, stretching-out, setting-out, shaving, splitting, or skiving skins, hides, or leather
- C14B1/14—Fleshing, unhairing, samming, stretching-out, setting-out, shaving, splitting, or skiving skins, hides, or leather using tools cutting the skin in a plane substantially parallel to its surface
Definitions
- Knives for splitting and cutting leather require to be frequently ground to keep them in good condition, and as the body of such knives require to be of considerable thickness and strength to adapt them to be properly mounted and secured in machines the'faees of the knives which have to be ground down every time the knifeis sharpened, are often two inches or more in breadth, and consequently a great deal of time and labor has heretofore been consumed in grinding the knives.
- my invention consists in a knife having a series of parallel and comparatively narrow faces arranged in steps, one back of another, from the edge toward the base or body of the knife, so that only one of these narrow faces, or one pair of them,will be presented to be ground at a time, and so that each face or pair of faces will come into play in turn as the knife is used up.
- Figure 1 is a side elevation of a knife embodying my invention.
- Fig. 2 is a cross-section; and
- Fig. 3 is a view similarto Fig. 2, showing the old way of making such knives.
- A represents the body of the knife, and a a the narrow faces arranged in steps, one back of another.
- the knife shownin the drawings is specially designed for use in a leather-splitting machine; but my invention is adapted for use upon other knives or other edge tools, which otherwise would present broad faces to be ground.
- the number of faces a on each side of the knife may be varied, as desired, and they should preferably be parallel to each other, so that as the knife is ground away the meeting faces which form its edge will always present the same angle to each other. As the knife or blade is used up, each succeeding pair of faces meet to form the edge of the knife. In knives which are intended to be ground only upon one side of course the narrow parallel step-faces a will be provided only upon one side of the knife.
- the series of step-faces a may be formed in the knife blank or stock by rolling, or in any other suitable manner, before tempering.
- the zigzag step-faces also facilitate the tempering of the blade and insure a better temper in that part of the blade which forms the edge, as it is ground back, because the zigzag steps take away part of the metal.
- the body of the blade is provided with guide -grooves a, preferably one near each end, in which fit suitable tongues or guides, b, on the frame or knife-seat B. By this means the blade is not only securely held in place, but when taken out and replaced no special adjustment is required to get the knife back to its proper position.
- I claim 1 An edge tool having a series of narrow grinding-faces arranged in steps, one back of another, to facilitate the grinding or sharpening of the same, substantially as specified.
- a knife or other edge tool having a series of narrow parallel grindingfaces arranged in steps, one back of another, substantially as specified.
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- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
Description
(No Model.)
0. E. ROBERTS.
KNIFE FOB. LEATHER SPLITTING MACHINES.
Patented June 29, 1886.
ilh illlllL j7Z7/57ZZOZ: m 5 W JZZbr/z, az-
ERS. mwmm iiNiTE STATES ATENT FFICEO CHARLES E. ROBERTS, OF CHICAGO, ILLINOIS.
KNIFE FOR LEATHER-SPLITTING MACHINES.
BPECEIEIOATION forming part of Letters Patent No. 344,404, dated June 29, 1886, Application filed October 12, 1885. Serial No. 179,642. (No model.)
To all whom it may concern.-
Be it known that I, CHARLES E. ROBERTS, a citizen of the United States, residing in Chicago,-in the county of Cook and State of lllinois, have invented a new and useful In1- provement in Knives for Leather-Split ing Machines, of which the following in a specification.
Knives for splitting and cutting leather require to be frequently ground to keep them in good condition, and as the body of such knives require to be of considerable thickness and strength to adapt them to be properly mounted and secured in machines the'faees of the knives which have to be ground down every time the knifeis sharpened, are often two inches or more in breadth, and consequently a great deal of time and labor has heretofore been consumed in grinding the knives.
It is the object of the present invention to obviate this difficulty and to provide a knife which, while it may have any required thickness and pitch of face, may still always present comparatively narrow grinding-faces, so that it may be easily and quickly sharpened; and to this end my invention consists in a knife having a series of parallel and comparatively narrow faces arranged in steps, one back of another, from the edge toward the base or body of the knife, so that only one of these narrow faces, or one pair of them,will be presented to be ground at a time, and so that each face or pair of faces will come into play in turn as the knife is used up.
In the accompanying drawings, which form a part of this specification, Figure 1 is a side elevation of a knife embodying my invention. Fig. 2 is a cross-section; and Fig. 3 is a view similarto Fig. 2, showing the old way of making such knives.
in said drawings, A represents the body of the knife, and a a the narrow faces arranged in steps, one back of another.
The knife shownin the drawings is specially designed for use in a leather-splitting machine; but my invention is adapted for use upon other knives or other edge tools, which otherwise would present broad faces to be ground.
The number of faces a on each side of the knife may be varied, as desired, and they should preferably be parallel to each other, so that as the knife is ground away the meeting faces which form its edge will always present the same angle to each other. As the knife or blade is used up, each succeeding pair of faces meet to form the edge of the knife. In knives which are intended to be ground only upon one side of course the narrow parallel step-faces a will be provided only upon one side of the knife. The series of step-faces a may be formed in the knife blank or stock by rolling, or in any other suitable manner, before tempering. The zigzag step-faces also facilitate the tempering of the blade and insure a better temper in that part of the blade which forms the edge, as it is ground back, because the zigzag steps take away part of the metal. The body of the blade is provided with guide -grooves a, preferably one near each end, in which fit suitable tongues or guides, b, on the frame or knife-seat B. By this means the blade is not only securely held in place, but when taken out and replaced no special adjustment is required to get the knife back to its proper position.
I claim 1. An edge tool having a series of narrow grinding-faces arranged in steps, one back of another, to facilitate the grinding or sharpening of the same, substantially as specified.
2. A knife or other edge tool having a series of narrow parallel grindingfaces arranged in steps, one back of another, substantially as specified.
CHARLES E. ROBERTS.
Vitnesses:
H. M. MUNDAY, EDMUND Anoook.
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US344404A true US344404A (en) | 1886-06-29 |
Family
ID=2413477
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US344404D Expired - Lifetime US344404A (en) | Knife for leather-splitting machines |
Country Status (1)
| Country | Link |
|---|---|
| US (1) | US344404A (en) |
-
0
- US US344404D patent/US344404A/en not_active Expired - Lifetime
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