CA1198383A - Paper can barrel - Google Patents
Paper can barrelInfo
- Publication number
- CA1198383A CA1198383A CA000397596A CA397596A CA1198383A CA 1198383 A CA1198383 A CA 1198383A CA 000397596 A CA000397596 A CA 000397596A CA 397596 A CA397596 A CA 397596A CA 1198383 A CA1198383 A CA 1198383A
- Authority
- CA
- Canada
- Prior art keywords
- paper
- marginal
- sheet
- barrel
- fusible
- 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
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D3/00—Rigid or semi-rigid containers having bodies or peripheral walls of curved or partially-curved cross-section made by winding or bending paper without folding along defined lines
- B65D3/22—Rigid or semi-rigid containers having bodies or peripheral walls of curved or partially-curved cross-section made by winding or bending paper without folding along defined lines with double walls; with walls incorporating air-chambers; with walls made of laminated material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D3/00—Rigid or semi-rigid containers having bodies or peripheral walls of curved or partially-curved cross-section made by winding or bending paper without folding along defined lines
- B65D3/28—Other details of walls
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J5/00—Adhesive processes in general; Adhesive processes not provided for elsewhere, e.g. relating to primers
- C09J5/10—Joining materials by welding overlapping edges with an insertion of plastic material
Abstract
ABSTRACT OF THE DISCLOSURE
The present invention provides a method of making a paper can barrel which comprises: applying to each surface of a sheet of paper a lining layer of a heat-fusible weldable synthetic resin; coating one marginal end inner surface of the said sheet of paper and also the other marginal end outer surface of the said sheet of paper with a heat-fusible and weldable synthetic resin layer having a serrated profile;
forming a jointing step on one of these two marginal ends;
superimposing the other marginal end on the jointing step;
and pressing and heating the superimposed portion so that the lining layers of resin in contact become fused together, and the serrated profile resin layers are caused to flow and spread over the two marginal ends.
The present invention provides a method of making a paper can barrel which comprises: applying to each surface of a sheet of paper a lining layer of a heat-fusible weldable synthetic resin; coating one marginal end inner surface of the said sheet of paper and also the other marginal end outer surface of the said sheet of paper with a heat-fusible and weldable synthetic resin layer having a serrated profile;
forming a jointing step on one of these two marginal ends;
superimposing the other marginal end on the jointing step;
and pressing and heating the superimposed portion so that the lining layers of resin in contact become fused together, and the serrated profile resin layers are caused to flow and spread over the two marginal ends.
Description
3~
This invention rela-tes -to a paper can barrel and, more particularly, to a paper can barrel in which the ver-tical joint portion is coated with a synthe-tic resin.
In a conventional paper can barrel, the ver-tical joint is formed by superposing both marginal ends of a sheet oE paper to each o-ther and adhering them to each o-ther by means of an adhesive or, al-ternatively, by lapping and jointing these marginal edges Wit}l the inner end being folded or bent. In the first-mentioned jointing struc-ture, however, the liquid contained by the can inconveniently permeates into the cut end surface of the paper sheet which is exposed to the inside of the can, so tha-t it is necessary suitably to treat the end surface to prevent the permeating of the liquid. In the join-ting structure of the second-mentioned type, the thickness of the jointing portion is increased undesirably to make it difficult to fix a can end plate to the paper can barrel. In addition, the non-adhered lapping portion in -the vertical join-t -tends to be deformed undesir-ably by application of externa] force.
Accordingly, the presen-t invention provides an improved paper can barrel having an improved join-t structure, -thereby to overcome -the above-described problems of the prior art.
To -this end, according to the invention,-there is provided a me-thod of making a paper can barrel which comprises apply-ing -to each surface of a sheet of paper a lining layer of a heat-fusible weldable synthetic resin; coating one marginal end inner surface of said sheet of paper and also -the other marginal end outer surface of the said shee-t of paper with a heat-fusible and weldable synthetic resin layer having a serrated profile; forming a jointing step on one of these two marginal ends; superimposing the other marginal end on the jointing step; and pressing and heating -the superimposed $~
3~3 portion so that -the lining layers of resin in contact become fused together, and the serrated profile resin layers are caused to flow and spread over the -two marginal ends.
In particular it has been found that coating the marginal surfaces of the shee-t of paper with a heat-fusible and weldable syn-thetic resin layer wi-th a serrated profile renders the layer more readily fusible than in a non-serra-ted profile thus reducing the-time for the pressing and heating of -the sheet of paper and -thus the risk of damaging the sheet of paper such as by scorching.
A preferred paper can barrel made in accordance with the invention is hereinafterOdescribed by reference to the accomapnying drawings, in which:-Fig. 1 is a schematic perspective view of -the paper can barrel;
Fig. 2 is a front elevational view of a paper sheet used as a blank for the paper can barrel shown in Fig.
1 ;
Fig. 3 is a plan view of the paper sheet shown in Fig. 2;
Fig. ~ is a schematic end view of the paper sheet in a rounded state;
Fig. S is an enlarged sec-tional view of a part of -the paper sheet as shown in Fig. ~; and Fig. 6 is an enlarged sectional view of the ver-tical joint portion of the paper can barrel.
The paper can barrel 6 as shown in Fig. 1, is
This invention rela-tes -to a paper can barrel and, more particularly, to a paper can barrel in which the ver-tical joint portion is coated with a synthe-tic resin.
In a conventional paper can barrel, the ver-tical joint is formed by superposing both marginal ends of a sheet oE paper to each o-ther and adhering them to each o-ther by means of an adhesive or, al-ternatively, by lapping and jointing these marginal edges Wit}l the inner end being folded or bent. In the first-mentioned jointing struc-ture, however, the liquid contained by the can inconveniently permeates into the cut end surface of the paper sheet which is exposed to the inside of the can, so tha-t it is necessary suitably to treat the end surface to prevent the permeating of the liquid. In the join-ting structure of the second-mentioned type, the thickness of the jointing portion is increased undesirably to make it difficult to fix a can end plate to the paper can barrel. In addition, the non-adhered lapping portion in -the vertical join-t -tends to be deformed undesir-ably by application of externa] force.
Accordingly, the presen-t invention provides an improved paper can barrel having an improved join-t structure, -thereby to overcome -the above-described problems of the prior art.
To -this end, according to the invention,-there is provided a me-thod of making a paper can barrel which comprises apply-ing -to each surface of a sheet of paper a lining layer of a heat-fusible weldable synthetic resin; coating one marginal end inner surface of said sheet of paper and also -the other marginal end outer surface of the said shee-t of paper with a heat-fusible and weldable synthetic resin layer having a serrated profile; forming a jointing step on one of these two marginal ends; superimposing the other marginal end on the jointing step; and pressing and heating -the superimposed $~
3~3 portion so that -the lining layers of resin in contact become fused together, and the serrated profile resin layers are caused to flow and spread over the -two marginal ends.
In particular it has been found that coating the marginal surfaces of the shee-t of paper with a heat-fusible and weldable syn-thetic resin layer wi-th a serrated profile renders the layer more readily fusible than in a non-serra-ted profile thus reducing the-time for the pressing and heating of -the sheet of paper and -thus the risk of damaging the sheet of paper such as by scorching.
A preferred paper can barrel made in accordance with the invention is hereinafterOdescribed by reference to the accomapnying drawings, in which:-Fig. 1 is a schematic perspective view of -the paper can barrel;
Fig. 2 is a front elevational view of a paper sheet used as a blank for the paper can barrel shown in Fig.
1 ;
Fig. 3 is a plan view of the paper sheet shown in Fig. 2;
Fig. ~ is a schematic end view of the paper sheet in a rounded state;
Fig. S is an enlarged sec-tional view of a part of -the paper sheet as shown in Fig. ~; and Fig. 6 is an enlarged sectional view of the ver-tical joint portion of the paper can barrel.
The paper can barrel 6 as shown in Fig. 1, is
2 --'~
3~13 constituted by a paper cylindrical body formed by join-ting both marginal ends of a shee-t 1 ofpaper shown in Fig.s 1 -to 4. The paper sheet 1 is prepared by lining the outer surface of a core paper sheet 7 (see Fig. 5) with a layer 4 of a heat-fusible and weldable synthetic :10 ~0 2a --resin such as polye-thylene, applying an alumin~n foil o to the inner surface of the core paper sheet 7, and lining the ou-ter surface of the aluminum foil 8 with a heat-fusible and weldable synthetic resin such as polye--thylene.
The surface of the marginal end 2 of the paper sheet 1, which is to constitute the inner surface of the vertical joint portion of the paper can barrel, is coated with a layer 5 of polyethylene of serrated profile.
Also, the.su~face of ~he marginal end 2a oF the paper shee-t 1, which is to constitute the outer surface of the ver-tical joint portion of the paper can barrel, is coa-ted with a layer 5a also of serrated proFile, as shown in Figs. 3 to 5.
The marginal end 2 of the paper sheet 1 is pressed over a predetermined width of, for example, about 8 mm -to form a join-ting step 3 which projects inwardly of the paper can barrel to be formed.
The paper sheet 1 thus formed is then rounded and i-ts marginal ends 2, 2a are lapped so that the marginal .
end 2a fits o~er the jointing step 3. The overlapping portion is then clamped and pressurized by a clamping tool while being subjected to heat, so that the polyethy-lene layers are fused and united to each other thereby to form a paper can barrel 6 having a vertical joint portion 10. Then the layers L~, L~a of the synthetic resin on the `~
".j
The surface of the marginal end 2 of the paper sheet 1, which is to constitute the inner surface of the vertical joint portion of the paper can barrel, is coated with a layer 5 of polyethylene of serrated profile.
Also, the.su~face of ~he marginal end 2a oF the paper shee-t 1, which is to constitute the outer surface of the ver-tical joint portion of the paper can barrel, is coa-ted with a layer 5a also of serrated proFile, as shown in Figs. 3 to 5.
The marginal end 2 of the paper sheet 1 is pressed over a predetermined width of, for example, about 8 mm -to form a join-ting step 3 which projects inwardly of the paper can barrel to be formed.
The paper sheet 1 thus formed is then rounded and i-ts marginal ends 2, 2a are lapped so that the marginal .
end 2a fits o~er the jointing step 3. The overlapping portion is then clamped and pressurized by a clamping tool while being subjected to heat, so that the polyethy-lene layers are fused and united to each other thereby to form a paper can barrel 6 having a vertical joint portion 10. Then the layers L~, L~a of the synthetic resin on the `~
".j
4.
inner and outer surfaces of the paper shee-t 1 are fused and softened so as to be integrated with each o-ther with the imler surface of the marginal end 2a firrnly adhered -to the outer surface of the jointing step 3.
Meanwhile, the layer 5 of the synthetic resin applied to the im~er end of the marginal end 2a, i.e. the jointing step 3, is fused to flow and spread toward the end surface 9 of the paper sheet 1 as sho~n in Fig. 6, so as to coat the inner end of the jointing step 3, end surface 9 and the inner portion of the marginal end 2a of the vertical joint portion. On the other hand, the layer 5a of the -synthetic resin applied to the outer end of the marginal end 2a of the paper sheet 1 is also fused to flow and spread toward the end surface 9a of the paper sheet 1 to coat the outer surface of the jointing step 3, end surface 9a and the outer side of the jointing marginal end 2a.
Since the marginal edge of the paper sheet 1 constit-uting the vartical joint portion 10 of the paper can barrel 6 is completely covered by the synthetic resin, it is possible -to avoid the undesirable permeation of the li4uid content of the paper can into the end surface of the paper shee-t now formed into the paper can barrel. Thanks to the provision of the jointing step 3, it is possible to obtain a smooth and continuous outer surface for the paper can barrel at the vertical joint portion 10.
, .. I
!33~3 Instead of projecting the jointing step 3 inwardly of tlle paper can barrel, it is possible -to project the s~ne outwardly of the paper can barrel.
It has been confirmed through an experiment conduc-ted by the presen-t inventors that the layers 5, 5a of the synthetic resin of serrated form flow and spread in a satisfactory manner.
In the paper can barrel of the present invention having the described construction, -the syn-the-tic resin applied to the jointing portion effec-tively stiffens the joint portion and comple-tely eliminates any permeation of the liquid content of the can into the cut end surface of the paper sheet constituting the paper can barrel.
~`1 , , -, -
inner and outer surfaces of the paper shee-t 1 are fused and softened so as to be integrated with each o-ther with the imler surface of the marginal end 2a firrnly adhered -to the outer surface of the jointing step 3.
Meanwhile, the layer 5 of the synthetic resin applied to the im~er end of the marginal end 2a, i.e. the jointing step 3, is fused to flow and spread toward the end surface 9 of the paper sheet 1 as sho~n in Fig. 6, so as to coat the inner end of the jointing step 3, end surface 9 and the inner portion of the marginal end 2a of the vertical joint portion. On the other hand, the layer 5a of the -synthetic resin applied to the outer end of the marginal end 2a of the paper sheet 1 is also fused to flow and spread toward the end surface 9a of the paper sheet 1 to coat the outer surface of the jointing step 3, end surface 9a and the outer side of the jointing marginal end 2a.
Since the marginal edge of the paper sheet 1 constit-uting the vartical joint portion 10 of the paper can barrel 6 is completely covered by the synthetic resin, it is possible -to avoid the undesirable permeation of the li4uid content of the paper can into the end surface of the paper shee-t now formed into the paper can barrel. Thanks to the provision of the jointing step 3, it is possible to obtain a smooth and continuous outer surface for the paper can barrel at the vertical joint portion 10.
, .. I
!33~3 Instead of projecting the jointing step 3 inwardly of tlle paper can barrel, it is possible -to project the s~ne outwardly of the paper can barrel.
It has been confirmed through an experiment conduc-ted by the presen-t inventors that the layers 5, 5a of the synthetic resin of serrated form flow and spread in a satisfactory manner.
In the paper can barrel of the present invention having the described construction, -the syn-the-tic resin applied to the jointing portion effec-tively stiffens the joint portion and comple-tely eliminates any permeation of the liquid content of the can into the cut end surface of the paper sheet constituting the paper can barrel.
~`1 , , -, -
Claims
PROPERTY OR PRIVILEGE IS CLAIMED ARE DEFINED AS FOLLOWS:
1. A method of making a paper can barrel which comprises:
applying to each surface of a sheet of paper a lining layer of a heat-fusible weldable synthetic resin:
coating one marginal end inner surface of the said sheet of paper and also the other marginal end outer surface of the said sheet of paper with a heat-fusible and weldable synthetic resin layer having a serrated profile;
forming a jointing step on one of these two marginal ends;
superimposing the other marginal end on the jointing step; and pressing and heating the superimposed portion so that the lining layers of resin in contact become fused together, and the serrated profile resin layers are caused to flow and spread over the two marginal ends.
applying to each surface of a sheet of paper a lining layer of a heat-fusible weldable synthetic resin:
coating one marginal end inner surface of the said sheet of paper and also the other marginal end outer surface of the said sheet of paper with a heat-fusible and weldable synthetic resin layer having a serrated profile;
forming a jointing step on one of these two marginal ends;
superimposing the other marginal end on the jointing step; and pressing and heating the superimposed portion so that the lining layers of resin in contact become fused together, and the serrated profile resin layers are caused to flow and spread over the two marginal ends.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP125390/81 | 1981-08-25 | ||
| JP1981125390U JPS5829912U (en) | 1981-08-25 | 1981-08-25 | paper can body |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1198383A true CA1198383A (en) | 1985-12-24 |
Family
ID=14908947
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000397596A Expired CA1198383A (en) | 1981-08-25 | 1982-03-04 | Paper can barrel |
Country Status (6)
| Country | Link |
|---|---|
| JP (1) | JPS5829912U (en) |
| KR (1) | KR880000637B1 (en) |
| CA (1) | CA1198383A (en) |
| DE (1) | DE3225992A1 (en) |
| FR (1) | FR2511974B1 (en) |
| GB (1) | GB2104443B (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CH680724A5 (en) * | 1991-03-06 | 1992-10-30 | Lamibox Ag C O Dres Reichlin & | |
| DE19502992A1 (en) * | 1995-02-01 | 1996-08-08 | Brain Power Consulting Gmbh | Process for producing hollow bodies and hollow bodies according to this method |
| GB9616302D0 (en) * | 1996-08-02 | 1996-09-11 | Field Group Plc | Tubular containers |
| FR2944780B1 (en) * | 2009-04-28 | 2011-06-10 | Lablabo | DEVICE FOR PACKAGING AND DISPENSING THE BOTTLE-POCKET TYPE |
| JP6609900B2 (en) * | 2014-09-17 | 2019-11-27 | 凸版印刷株式会社 | Paper cup |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2275063A (en) * | 1937-08-17 | 1942-03-03 | Humoco Corp | Container and method of making the same |
| US2190479A (en) * | 1938-08-16 | 1940-02-13 | Humoco Corp | Method and means for making containers |
| GB631294A (en) * | 1939-03-20 | 1949-10-31 | Shellmar Products Corp | Improvements in or relating to a container and method of making the same |
| US2261416A (en) * | 1939-07-04 | 1941-11-04 | Harold D Schrier | Method of making containers |
| US3004694A (en) * | 1958-03-19 | 1961-10-17 | Safe Pack Container Co | Container structures |
| FR1540101A (en) * | 1966-10-07 | 1968-09-20 | Int Paper Co | Laminated wall packaging box, as well as method and installation for its manufacture |
| CH479463A (en) * | 1968-02-08 | 1969-10-15 | Alexon Pac Ag | Packaging can, especially for liquids containing gas |
| JPS5414621B2 (en) * | 1971-12-25 | 1979-06-08 | ||
| DE2635011A1 (en) * | 1976-08-04 | 1978-02-09 | Henkel Kgaa | DRUM FOR SCHUETTGUT |
-
1981
- 1981-08-25 JP JP1981125390U patent/JPS5829912U/en active Pending
-
1982
- 1982-02-26 FR FR8203297A patent/FR2511974B1/en not_active Expired
- 1982-03-04 CA CA000397596A patent/CA1198383A/en not_active Expired
- 1982-03-29 KR KR828201346A patent/KR880000637B1/en active
- 1982-05-13 GB GB08213927A patent/GB2104443B/en not_active Expired
- 1982-07-12 DE DE19823225992 patent/DE3225992A1/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| FR2511974B1 (en) | 1986-05-02 |
| GB2104443A (en) | 1983-03-09 |
| GB2104443B (en) | 1985-09-25 |
| KR830008897A (en) | 1983-12-16 |
| DE3225992C2 (en) | 1988-07-14 |
| JPS5829912U (en) | 1983-02-26 |
| DE3225992A1 (en) | 1983-03-10 |
| KR880000637B1 (en) | 1988-04-19 |
| FR2511974A1 (en) | 1983-03-04 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |