GB2242153A - Blade tools - Google Patents
Blade tools Download PDFInfo
- Publication number
- GB2242153A GB2242153A GB9102533A GB9102533A GB2242153A GB 2242153 A GB2242153 A GB 2242153A GB 9102533 A GB9102533 A GB 9102533A GB 9102533 A GB9102533 A GB 9102533A GB 2242153 A GB2242153 A GB 2242153A
- Authority
- GB
- United Kingdom
- Prior art keywords
- blank
- bolsters
- blade
- handle
- bolster
- 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- Withdrawn
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25G—HANDLES FOR HAND IMPLEMENTS
- B25G3/00—Attaching handles to the implements
- B25G3/02—Socket, tang, or like fixings
- B25G3/04—Socket, tang, or like fixings with detachable or separate socket pieces
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25G—HANDLES FOR HAND IMPLEMENTS
- B25G3/00—Attaching handles to the implements
- B25G3/02—Socket, tang, or like fixings
- B25G3/12—Locking and securing devices
- B25G3/26—Locking and securing devices comprising nails, screws, bolts, or pins traversing or entering the socket
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Knives (AREA)
Abstract
A method of manufacturing a bolstered blade tool, comprises providing a blank (1) having a blade portion (4) integral with a handle portion (5) and fixing bolsters (2) to the blank on either side of a region (6) of the blank where the blade portion meets the handle portion by adhesive or by means (9) passing through the blank and connecting one bolster to the other with the blank gripped between the bolsters. Handle members are attached similarly to the handle portions. <IMAGE>
Description
BLADE TOOLS
The present invention relates to the manufacture of bolstered blade tools. Such tools comprise a blade and a handle with bolsters between the blade and the handle.
A conventional method of manufacturing bolstered blade tools comprises forming a blank comprising a blade portion and a handle portion, with bolsters on opposite sides of the blade portion, by drop forging of a steel billet to an approximate pattern and rolling of the forging to make the blade portion substantially flat. The resulting blank is then cut and ground as required and handle elements are fixed to the handle portion to produce the finished tool.
The forged and rolled blanks vary considerably in dimensions and quality and consequently are unsuitable for production of finished tools by low cost mass production techniques using unskilled labour.
It is also known to manufacture bolstered blade tools by a method comprising providing a strip steel blank defining a blade portion and a handle portion and welding bolsters to opposite sides of the blank at the region where the blade portion meets the handle portion.
A further known method of manufacturing bolstered blade tools comprises providing a handle portion integrally formed with a bolster portion and providing a separate blade portion, and attaching the blade portion to the bolster portion by electrical flash butt welding or electrical resistance welding.
The methods described above and which comprise welding also require skilled labour and are therefore unsuitable for low cost manufacturing using unskilled labour.
The present invention provides a method of manufacturing a bolstered blade tool and which avoids the need for skilled labour.
In accordance with the present invention there is provided a method of manufacturing a bolstered blade tool, comprising providing a blank having a blade portion integral with a handle portion and fixing bolsters to the blank on either side of a region of the blank where the blade portion meets the handle portion by adhesive or by means passing through the blank and connecting one bolster to the other with the blank gripped between the bolsters.
The blank would normally be of steel, especially spring steel.
Handle elements, such as wooden scales would usually be attached to the blank on either side of the blade portion. The handle elements may be of wood or plastic.
The bolsters may be of diecasting zinc alloy, aluminium, sintered mental, brass or other metals or alloys.
The said connecting means may comprise one or more rivets.
Alternatively, or additionally, the connecting neans may ccnprise one or more male portion(s) integrally formed with one of the bolsters, the other bolster having one or more corresponding female portion(s) in which the male portion(s) engage. The male portion(s) may be affixed in the female portion(s) by being a snug fit in the female portion(s) or may be fixed in the female portion(s) by adhesive.
Countersunk holes may be provided in the bolsters for receiving the heads of the rivet(s) and the deformed/peened over end(s) of the rivet shank(s).
The tool may be an item of painters' cutlery, such as a scraper, a spreader knife or a filler knife or may be a table knife.
Where adhesive is used to affix the bolsters to the blank or to affix the male portions in the female portions, the adhesive may be epoxy resin of the type known as two-pack epoxy resin.
The invention is further described below by way of example with reference to the accompanying drawings, wherein:
Figure 1 shows the components of a bolstered blade tool to be manufactured according to the invention;
Figure 2 shows the completed tool;
Figure 3 shows a section along line III-III of Figure 2;
Figures 4 and 4 show sections, corresponding to the section of
Figure 3, through tools according to the invention but showing alternative means for affixing the bolsters to the blades
Referring to Figure 1, a bolstered tool is manufactured from a blank 1, a pair of cast bolsters 2 and a pair of wooden scales 3.
The blank 1 comprises a blade portion 4, a handle portion 5 and a region 6 where the blade portion meets the handle portion.
Each bolster 2 is provided with a through hole 7 countersunk at its end 7a ( see Figure 3) to be rettte fran the blank.
The region 6 of the blank is provided with a through hole 8.
The bolsters 2 are attached to the blank by passing a rivet 9 through hole 7 and the hole 8. The head of the rivet is received in the countersunk end 7a of one hole 7 and the free end of the shank of the rivet is peened over in the countersunk end of the hole 7 of the other bolster. The blank is thereby firmly gripped between the bolsters 2.
The wooden scales 3 are attached to the handle portion 5 by rivets 10 passed through holes 11 in the scales 3 and through holes 12 in the handle portion 5. The free end of the shanks of the rivets are peened over to retain the scales 3 on the handle portion 5.
Similarly to the bolsters, the heads and the peened over free ends of the shanks of the rivets 10 may be received in countersunk end portions of the holes 11.
Adhesive may be used, as well as the rivets 9 and 10, to retain the bolsters 2 and the scales 3 on the blank.
It has surprisingly been found that the use of the rivet 9 holds the bolsters 2 firmly and immovably on the blank 1 for an indefinite period of time even when the tool is subject to heavy use. This is contrary to expectations. It would have been expected that the bolsters 2 would tend to work loose.
As an alternative to rivets, as shown in Figure 4, one bolster may be provided with a male portion 20 and the other bolster with a female portion 21. The male portion is passed through the hole 8 and secured in the female portion by adhesive 22.
As a further modification, as shown in Figure 5, one bolster is provided with two male portions 20, the region 6 of the blank has two holes 8 through which the male portions are passed and the other bolster has two female portions 21 in which the male portions are received and secured by adhesive 22.
It has been found that such male and female portions 20 and 21 are as effective as rivets in securing the bolsters 2 to the blank 1.
Claims (10)
1. A method of manufacturing a bolstered blade tool, canprising: providing a blank having a blade portion integral with a handle portion; and fixing bolsters to the blank on either side of a region of the blank where the blade portion meets the handle portion by adhesive and/or by neans passing through the blank, said means connecting one bolster to the other and the blank being gripped between the bolsters.
2. A method according to claim 1, wherein the blank is of steel.
3. A method according to claim 2, wherein the steel is spring steel.
4. A method according to any preceding claim, wherein handle elements are attached to the blank on either side of the blade portion.
5. A method according to any preceding claim, wherein the bolsters are of diecasting zinc alloy, alutrtinium, sintered metal, brass or other netals Or alloy.
6. A method according to any preceding claim, wherein the said connecting means comprises one or more rivets.
7. A method according to any preceding claim, wherein the connecting means comprises one or more male portion(s) integrally formed with one of the bolsters, the other bolster having one or more corresponding female portion (S) in which the male portions) engage.
8. A method according to claim 7, wherein the male portion(s) are affixed in the female portion(s) by being a snug fit in the female portion(s) or are fixed in the female portion (s) by adhesive.
9. A method according to any preceding claim, wherein the tool is an item of painters' cutlery or a table knife.
10. A method of manufacturing a bolstered blade tool substantially as described herein with reference to the accompanying drawings.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB909003181A GB9003181D0 (en) | 1990-02-13 | 1990-02-13 | Blade tools |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| GB9102533D0 GB9102533D0 (en) | 1991-03-27 |
| GB2242153A true GB2242153A (en) | 1991-09-25 |
Family
ID=10670876
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB909003181A Pending GB9003181D0 (en) | 1990-02-13 | 1990-02-13 | Blade tools |
| GB9102533A Withdrawn GB2242153A (en) | 1990-02-13 | 1991-02-06 | Blade tools |
Family Applications Before (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB909003181A Pending GB9003181D0 (en) | 1990-02-13 | 1990-02-13 | Blade tools |
Country Status (1)
| Country | Link |
|---|---|
| GB (2) | GB9003181D0 (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB973188A (en) * | 1961-06-27 | 1964-10-21 | Carlo Ragni | Smoothing trowel provided with a central handle |
-
1990
- 1990-02-13 GB GB909003181A patent/GB9003181D0/en active Pending
-
1991
- 1991-02-06 GB GB9102533A patent/GB2242153A/en not_active Withdrawn
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB973188A (en) * | 1961-06-27 | 1964-10-21 | Carlo Ragni | Smoothing trowel provided with a central handle |
Also Published As
| Publication number | Publication date |
|---|---|
| GB9003181D0 (en) | 1990-04-11 |
| GB9102533D0 (en) | 1991-03-27 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| WAP | Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1) |