CA2070904A1 - Shells with cardboard tube with improved characteristics - Google Patents
Shells with cardboard tube with improved characteristicsInfo
- Publication number
- CA2070904A1 CA2070904A1 CA 2070904 CA2070904A CA2070904A1 CA 2070904 A1 CA2070904 A1 CA 2070904A1 CA 2070904 CA2070904 CA 2070904 CA 2070904 A CA2070904 A CA 2070904A CA 2070904 A1 CA2070904 A1 CA 2070904A1
- Authority
- CA
- Canada
- Prior art keywords
- shell
- tube
- accordance
- elements
- axis
- 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.)
- Abandoned
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F42—AMMUNITION; BLASTING
- F42B—EXPLOSIVE CHARGES, e.g. FOR BLASTING, FIREWORKS, AMMUNITION
- F42B5/00—Cartridge ammunition, e.g. separately-loaded propellant charges
- F42B5/26—Cartridge cases
Abstract
ABSTRACT
A shell (10) is formed from a tube (13) closed at one end by an end cap (14) including a primer. The tube (13) is realized from a strip of paper (11) closely rolled in accordance with the axis of the tube with positioning between the turns of flexible reinforcing elements such as for example gauze (12) or threads extending substantially in the direction of extension of the strip.
A shell (10) is formed from a tube (13) closed at one end by an end cap (14) including a primer. The tube (13) is realized from a strip of paper (11) closely rolled in accordance with the axis of the tube with positioning between the turns of flexible reinforcing elements such as for example gauze (12) or threads extending substantially in the direction of extension of the strip.
Description
0~09~
"Shells with cardboard tube with improved characteristics"
Shells are known, as for example thP hunting type with lead shot, ha~ing the shell formed from a tubular part for containment of the charge and shot ~ith a metal end cap containing the primer. It is clear that, upen ~hooting, the tubular part must resist high pressure ~ithout breaking or splitting.
In tha known art said tu~ular part, generally to be discarded, is made of plastic or stout cardboard.
Realization in plastic ensures the necessary mechanical lo characteristics but constitutes a source sf - nonbiodegradable waste material.
On the other hand, cardboard shells have mechanical characteristics poorer than those of plastic and, to be acceptable, the papers used for manufacture of the tub~
must be o~ excellent quality. With ~he manufacturing procedures for shells of the known art there are reguired thus pa~ers with special characteristics such as thosa made with pure long fibre cellulose which can only be obtained by the use of virgin vegetable cellulose.
This excludes for e~ample cardboard tubes made with papers coming from the recycling of paper products which, even if not having valuable characteristic~, have the u~deniable ad~antage of lesser cost.
The general purpose of the present invention is to obviate the above mentioned shortcomings by supplying cardboard shells having mechanical characteristics of resistance 2~7~9~4 comparable to those of plastic shells, even while using papers of not elevated quality, such as for example papers obtained by recycling.
In YieW 0~ said purpose it has been sought to provide, in accordance with the present invention, a cartridge shell of the type formed from a tube closed at one ~nd by an end cap including a primer and characterized in that the tube is formed from a strip of paper glued and closely wound along the axis of the tube with po~itioning between the turns of fle~ible reinforcement elements extending substantially in the direction of extension of the strip.
To further clarify the explanation of the innovative principles of the pr~sent invention and its advantages as compared with the known art there are described below with the aid of the anne~ed drawings possible embodiments as nonlimiting e~amples applying said principles. In the drawings:
- FIG. 1 shows an exploded perspective view of a first embodiment of a shell in accordance with the present in~entionr - FIG. 2 shows an exploded perspective ~iew of a second embodiment of ~he shell in accordance wi~h the present invention, and - FIG. 3 shows an exploded perspective view of a third embodiment of the shell in accordance with the present invention.
With reference to the fi~ures, FIG. 1 shows a shell, indicated as a whole by reference number 10, partially `` 2~7~0~
unwound to show its innovative structure. The shell in accord~nce with the present invention is made of a strip of paper 11-and a strip of gauze 12 wound together with a bonding agent to form a tube 13 to which is applied at one end, in accordance with the known art, a normal metal end cap 14 containing for example a base wad 17 for firmly assembling the tube and end cap and supporting the cartridge primer. Said ba~e wad can be of paper or other biodegradable material. The gauze must be of material of suitable mechanical strength depending on the characteristics of the shell it is desired to obtain and the type of paper used. For example, plain cotton has been found to be usable. In this manner, the tube is formed of successi~e alternating layers of gauze and paper glued 15 together. Such an embodiment furnishes high strength, both longitudinal and transverse, to the shell, making it competitive with plastic products, even though it is more economical to construct.
FIG. 2 shows an alternative embodiment applying again the 20 principles claimed herein. In said second embodiment a shell 110 is realized by winding a strip of paper 111 together with parallel threads 115 ~o as to form a tube 113 to which is applied an end cap 114 similar to the end cap 14 of FIG. 1, with base wad 117. The threads 115 can 25 be made of cotton, nylon, metal, etc.
In this embodiment too there is achieved high strength of the shell, making it competitive with plastic products.
FIG. 3 ~hows a third embodiment in accordance with the ~07~04 innovative principles of the invention. In said third embodiment a shell 210 is made by winding a strip of paper 211 ~ogether with a thread 216 arranged helically so as to form a tube 213 to which is applied an end cap 214 similar to the end cap 14 of FIG. 1 and with hase wad 217. The thread 216 must be a material with mechanical characteristics based on the characteris.tics of the shsll it is desired to ob~ain and the type of paper used. For example,- threads of ~otton, nylon, ~etal, plastic in general, etc. have been found u~able.
In this embodiment too there is obtained high strength of the shell, making it competiti~e with plastic materials.
In all the embodiments shown it is not necessary that the paper used be of high quality and it may be, for example, paper produced by recycling.
In addition, making the gauze or threads of biodegradable material, a shell is provided which disintegrates a short time a~ter its abandonment to the elements.
Naturally ths above description of an embodiment applying the innovative principles of the present invention is gi~en merely by way of example and therefore is not to be taken as a limitation of the patent right claimed here.
Fox e~ample, the threads can be replaced by flexible elements realized in the form of s~rips. It i~ also possible, for example in the embodime~t of FIG. 3, to u~e two threads arranged in opposing helices.
Finally, both the paper and the reinforcing elements can be wrapped with fixed or variable pitch inclined to the 207~9~
axis of rotation of the tube, e.g. at an angle of 45-. The reinforcement elements are thus substantially laid in the direction of winding of the strip, it being intended that they are not parallel to the tube axis but inclined thereto.
"Shells with cardboard tube with improved characteristics"
Shells are known, as for example thP hunting type with lead shot, ha~ing the shell formed from a tubular part for containment of the charge and shot ~ith a metal end cap containing the primer. It is clear that, upen ~hooting, the tubular part must resist high pressure ~ithout breaking or splitting.
In tha known art said tu~ular part, generally to be discarded, is made of plastic or stout cardboard.
Realization in plastic ensures the necessary mechanical lo characteristics but constitutes a source sf - nonbiodegradable waste material.
On the other hand, cardboard shells have mechanical characteristics poorer than those of plastic and, to be acceptable, the papers used for manufacture of the tub~
must be o~ excellent quality. With ~he manufacturing procedures for shells of the known art there are reguired thus pa~ers with special characteristics such as thosa made with pure long fibre cellulose which can only be obtained by the use of virgin vegetable cellulose.
This excludes for e~ample cardboard tubes made with papers coming from the recycling of paper products which, even if not having valuable characteristic~, have the u~deniable ad~antage of lesser cost.
The general purpose of the present invention is to obviate the above mentioned shortcomings by supplying cardboard shells having mechanical characteristics of resistance 2~7~9~4 comparable to those of plastic shells, even while using papers of not elevated quality, such as for example papers obtained by recycling.
In YieW 0~ said purpose it has been sought to provide, in accordance with the present invention, a cartridge shell of the type formed from a tube closed at one ~nd by an end cap including a primer and characterized in that the tube is formed from a strip of paper glued and closely wound along the axis of the tube with po~itioning between the turns of fle~ible reinforcement elements extending substantially in the direction of extension of the strip.
To further clarify the explanation of the innovative principles of the pr~sent invention and its advantages as compared with the known art there are described below with the aid of the anne~ed drawings possible embodiments as nonlimiting e~amples applying said principles. In the drawings:
- FIG. 1 shows an exploded perspective view of a first embodiment of a shell in accordance with the present in~entionr - FIG. 2 shows an exploded perspective ~iew of a second embodiment of ~he shell in accordance wi~h the present invention, and - FIG. 3 shows an exploded perspective view of a third embodiment of the shell in accordance with the present invention.
With reference to the fi~ures, FIG. 1 shows a shell, indicated as a whole by reference number 10, partially `` 2~7~0~
unwound to show its innovative structure. The shell in accord~nce with the present invention is made of a strip of paper 11-and a strip of gauze 12 wound together with a bonding agent to form a tube 13 to which is applied at one end, in accordance with the known art, a normal metal end cap 14 containing for example a base wad 17 for firmly assembling the tube and end cap and supporting the cartridge primer. Said ba~e wad can be of paper or other biodegradable material. The gauze must be of material of suitable mechanical strength depending on the characteristics of the shell it is desired to obtain and the type of paper used. For example, plain cotton has been found to be usable. In this manner, the tube is formed of successi~e alternating layers of gauze and paper glued 15 together. Such an embodiment furnishes high strength, both longitudinal and transverse, to the shell, making it competitive with plastic products, even though it is more economical to construct.
FIG. 2 shows an alternative embodiment applying again the 20 principles claimed herein. In said second embodiment a shell 110 is realized by winding a strip of paper 111 together with parallel threads 115 ~o as to form a tube 113 to which is applied an end cap 114 similar to the end cap 14 of FIG. 1, with base wad 117. The threads 115 can 25 be made of cotton, nylon, metal, etc.
In this embodiment too there is achieved high strength of the shell, making it competitive with plastic products.
FIG. 3 ~hows a third embodiment in accordance with the ~07~04 innovative principles of the invention. In said third embodiment a shell 210 is made by winding a strip of paper 211 ~ogether with a thread 216 arranged helically so as to form a tube 213 to which is applied an end cap 214 similar to the end cap 14 of FIG. 1 and with hase wad 217. The thread 216 must be a material with mechanical characteristics based on the characteris.tics of the shsll it is desired to ob~ain and the type of paper used. For example,- threads of ~otton, nylon, ~etal, plastic in general, etc. have been found u~able.
In this embodiment too there is obtained high strength of the shell, making it competiti~e with plastic materials.
In all the embodiments shown it is not necessary that the paper used be of high quality and it may be, for example, paper produced by recycling.
In addition, making the gauze or threads of biodegradable material, a shell is provided which disintegrates a short time a~ter its abandonment to the elements.
Naturally ths above description of an embodiment applying the innovative principles of the present invention is gi~en merely by way of example and therefore is not to be taken as a limitation of the patent right claimed here.
Fox e~ample, the threads can be replaced by flexible elements realized in the form of s~rips. It i~ also possible, for example in the embodime~t of FIG. 3, to u~e two threads arranged in opposing helices.
Finally, both the paper and the reinforcing elements can be wrapped with fixed or variable pitch inclined to the 207~9~
axis of rotation of the tube, e.g. at an angle of 45-. The reinforcement elements are thus substantially laid in the direction of winding of the strip, it being intended that they are not parallel to the tube axis but inclined thereto.
Claims (9)
1. Cartridge shell of the type formed from a tube closed at one end by an end cap including a primer and characterized in that the tube is formed from a strip of paper glued and closely wound in accordance with the axis of the tube with positioning between the turns of flexible reinforcement elements extending substantially in the direction of extension of the strip.
2. Shell in accordance with claim 1 characterized in that said elements are made of gauze.
3. Shell in accordance with claim 1 characterized in that said elements are made as a plurality of parallel elements each substantially contained in a plane normal with the axis of the tube.
4. Shell in accordance with claim 1 characterized in that said elements are made with at least one element arranged helically around the axis of the tube.
5. Shell in accordance with claim 1 characterized in that said elements are made in the form of threads.
6. Shell in accordance with claim 5 characterized in that said threads are of biodegradable material and in particular vegetable fibre such as cotton.
7. Shell in accordance with claim 5 characterized in that said gauze is of biodegradable material and in particular vegetable fibre such as cotton.
8. Shell in accordance with claim 1 characterized in that said elements are wrapped oblique to the axis of the tube and preferably at an angle of approximately 45°.
9. Shell in accordance with claim 9 characterized in that the paper strip is wrapped oblique to the axis of the tube and preferably at an angle of approximately 45°.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| ITMI91U000624 | 1991-07-05 | ||
| IT91MI000624U ITMI910624U1 (en) | 1991-07-05 | 1991-07-05 | BOOTS WITH CARDBOARD TUBE WITH IMPROVED CHARACTERISTICS |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2070904A1 true CA2070904A1 (en) | 1993-01-06 |
Family
ID=11358956
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA 2070904 Abandoned CA2070904A1 (en) | 1991-07-05 | 1992-06-10 | Shells with cardboard tube with improved characteristics |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP0526924A1 (en) |
| CA (1) | CA2070904A1 (en) |
| IT (1) | ITMI910624U1 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5460884A (en) | 1994-08-25 | 1995-10-24 | Kimberly-Clark Corporation | Soft and strong thermoplastic polymer fibers and nonwoven fabric made therefrom |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR1163884A (en) * | 1955-09-30 | 1958-10-02 | Olin Mathieson | Cartridge refinements |
| US2984182A (en) * | 1958-03-03 | 1961-05-16 | R C Can Co | Shotgun shell tube or cartridge |
| US3076409A (en) * | 1960-09-12 | 1963-02-05 | Olin Mathieson | Spiral wound shotshell |
| BE774940A (en) * | 1971-11-04 | 1972-03-01 | Areac S A | WATERPROOF CARTRIDGE AND PROCESS FOR OBTAINING, |
| IT1178605B (en) * | 1984-10-31 | 1987-09-09 | Fiocchi Munizioni Spa | HUNTING, SHOOTING AND SIMILAR COMPONENTS IN PHOTODEGRADABLE SYNTHETIC PLASTIC MATERIAL |
-
1991
- 1991-07-05 IT IT91MI000624U patent/ITMI910624U1/en unknown
-
1992
- 1992-06-10 CA CA 2070904 patent/CA2070904A1/en not_active Abandoned
- 1992-06-30 EP EP92201938A patent/EP0526924A1/en not_active Withdrawn
Also Published As
| Publication number | Publication date |
|---|---|
| EP0526924A1 (en) | 1993-02-10 |
| ITMI910624V0 (en) | 1991-07-05 |
| ITMI910624U1 (en) | 1993-01-05 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US6036139A (en) | Differential ply core for core wound paper products | |
| US5688571A (en) | Composite tubular member with internal reinforcement and method | |
| CA2124700C (en) | Enhanced crush strength construction multi-grade paperboard tubes | |
| CA1042664A (en) | Flexible hollow fishing rod | |
| US4178713A (en) | Fishing rod made of fiber reinforced synthetic resin | |
| CA2043579A1 (en) | Pressurized fluid storage tank and fabrication process thereof | |
| US6270426B1 (en) | Golf club shaft | |
| DK0410884T3 (en) | Thin metal wall pressure bottle reinforced with a carbon fiber winding and process of its manufacture | |
| CA2070904A1 (en) | Shells with cardboard tube with improved characteristics | |
| US5592771A (en) | Tubular fishing rod and its method of manufacture | |
| EP0701774B1 (en) | Intra-line fishing rod | |
| US3725944A (en) | Free standing fiberglass antenna | |
| US4660926A (en) | Optical cable | |
| JPH05168375A (en) | Material for fishing rod and its production | |
| ITMI952341A1 (en) | BOOTS WITH CARDBOARD TUBE WITH IMPROVED FEATURES | |
| US577736A (en) | Bobbin | |
| US1145415A (en) | Reinforced-fiber container. | |
| EP0446389B1 (en) | Multi-layer filter cartridge | |
| JP4539953B2 (en) | An inlay splice type fishing rod and a method of manufacturing an inlay core constituting the same. | |
| JPH0288088A (en) | Golf shaft and manufacture thereof | |
| CN114430693B (en) | Badminton racket | |
| JPS5913823Y2 (en) | Tsugashiro | |
| US887621A (en) | Bobbin. | |
| JPS5973683A (en) | Structure of plastic pipe | |
| JPS61121933A (en) | Laminated tube for fishing rod, etc. |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FZDE | Dead |