CA1231312A - Injection moulded container - Google Patents
Injection moulded containerInfo
- Publication number
- CA1231312A CA1231312A CA000484226A CA484226A CA1231312A CA 1231312 A CA1231312 A CA 1231312A CA 000484226 A CA000484226 A CA 000484226A CA 484226 A CA484226 A CA 484226A CA 1231312 A CA1231312 A CA 1231312A
- Authority
- CA
- Canada
- Prior art keywords
- cylindrical wall
- spigot
- handle
- socket
- container
- 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
Landscapes
- Details Of Rigid Or Semi-Rigid Containers (AREA)
Abstract
ABSTRACT
INJECTION MOULDED CONTAINER
The container comprises a body, which is a one-piece injection moulding, having a cylindrical wall (12) with a smooth exterior without projections, a mouth (13) and a rim (14). At diametrically opposite positions on the cylindrical wall is provided an inwardly projecting boss (20) having no projection to the exterior. Each boss has a recess (21) open to the exterior and receiving in snap-engagement a spigot (32) on one end of a carrying handle (30) of yoke form. The spigot has annular bearing ribs (33, 34) journalled in the recess and has a locating blip (35) for engaging a depression (23) for releasably locat-ing the handle relative to the body.
INJECTION MOULDED CONTAINER
The container comprises a body, which is a one-piece injection moulding, having a cylindrical wall (12) with a smooth exterior without projections, a mouth (13) and a rim (14). At diametrically opposite positions on the cylindrical wall is provided an inwardly projecting boss (20) having no projection to the exterior. Each boss has a recess (21) open to the exterior and receiving in snap-engagement a spigot (32) on one end of a carrying handle (30) of yoke form. The spigot has annular bearing ribs (33, 34) journalled in the recess and has a locating blip (35) for engaging a depression (23) for releasably locat-ing the handle relative to the body.
Description
'I I 3 Jo INJECTION MOUNDED CONTAINER
This invention relates to injection mounded contain-ens.
Paint and similar materials are usually sold in met-at containers of the type having a body, a cylindrical side wall and a mouth at the top defined by a radially inwardly projecting rim This rim defines a drip channel and tightly receives a plug-fitting lid. A carrying handle is mounted in yoke fashion on the side wall with opposite end parts of the handle pivotal mounted on external projections on the side wall. The external sun-face of the side wall is directly printed.
Printing is carried out on a blank of sheet metal prior to forming of the side wall of the container from the sheet. A pair of projections is riveted to the side wall after printing and each projection extends to the exterior of the side wall with a formation for receiving a respective end part of the handle.
It has become desirable for container of this type to be manufactured by injection mounding without losing the character of the metal container. Such a container has to be printed on a cylindrical side wall and it is important that the exterior surface of the side wall is smooth to facilitate printing. Any projections on the exterior surface of the side wall would interfere with the printing process or make this difficult to carry out.
This has been avoided by welding projecting formations onto the surface after printing and then pivotal ail-aching the handle to the formations This has the disadvantages that two welding steps 30 have to be carried out on each container and the result-ant weld is liable to break, so that, after filling the container there are a number of rejects.
The present invention is concerned with eliminating the welding step and providing a more reliable connection 3 3 Jo of the handle to the container body, without making the printing process more difficult to carry out.
The present invention is characterized in that, prior to fitting of the handle, the circumferential en-vernal surface of the side wall is smooth without any projections, a pair of diametrically opposite internal projections extend radially inwardly from the inner sun-face of the side wall, each projection having a recess open to the exterior of the body, each end part of the handle having a spigot which pivotal seats in the corn-responding one of the recesses, and retaining means no-twining each spigot in the recess.
French Certificate d'Utilite' No. 7411108 discloses a barrel-shaped plastics mounding, whose body is made in two halves sealed together along their edges A separate top is secured to the body and has a narrow neck for no-ceiling a stopper. The neck has inwardly extending pro-sections which receive trunnions of a handle. This is a complicated construction, which could not be made in one piece by injection mounding and has no relation to the type of container with which the invention is concerned.
It would not be obvious to a skilled person faced with the problem solved by the present invention, to injection - mound the container with inward projections in the body side wall, if this French publication was available to him. The problem is not relevant to this publication and adaption of a container of the type for holding paint to the construction shown in this publication would render the container useless for its intended purposes, as well as making it impossible to produce by injection mounding.
Furthermore, it would be impossible to make a con-trainer of the type envisaged by the present invention by blow-moulding. In addition, blow-moulding produces a container with walls of uneven thickness, so that very thick walls would be required for a container of suffice tent strength, as compared with -the very thin and strong walls which can be achieved by injection mounding in polypropylene. The external finish of a blow-moulded container is also poor and the smooth printed finish ail-Anabel by the present invention is not attainable byblow-moulding techniques.
In the preferred construction, pivotal movement is facilitated by the provision of spaced annular ribs on a spigot of the handle, which ribs define bearings mourn-ailed in the recess. This ensures that the handle cannot bind and be held in a raised position, which would inter-lore with automatic handling of the containers, e.g. dun-in filling. One of these ribs co-operates with a shoulder at the entrance to the recess to retain the handle in the recess. The arrangement is such that the spigots can automatically be pushed into the recesses to provide the pivotal inter-connections, the shoulder and/or the ribs being resilient to provide for snap-engagement The spigot is pivotal movable relative to the body of the container and this could cause a problem in mock-apical handling for filling the container. There is some vibration during conveyance and the handles could move into positions where they interfere with the process.
This is prevented by providing the end of each spigot and the adjacent end wall of the respective recess with rest iliently interengageable parts, which define location means for resiliently holding the handle in a given post-lion. The handle may be held positively in a precise position, or resiliently prevented from passing a precise position until small force is applied to the handle.
Reference is now made to the accompanying drawings, wherein:-Figure 1 is a side elevation of a body of a contain-or according to the invention, shown partly in cross-- -section;
Figure 2 is an underneath plan view of the container body;
Figure 3 is an enlarged detail view in cross-section showing how a handle is attached to the body of the con-trainer; and Figure 4 is an enlarged perspective view, partly in section, of a detail of the container showing a connect lion of the handle to the body.
The container shown in Figure 1 is a one-piece in-section mounding and has a bottom 11, a main cylindrical wall 12 and an open mouth 13 surrounded by an inwardly extending peripheral rim 14, formed as a drip channel.
As shown in Figure 2 the bottom 11 is reinforced by a pattern of integral radial and circular ribs 15, 16.
The cylindrical wall 12 is provided internally with integral vanes 17 adjacent the rim 14, the vanes being spaced around the wall.
elbow the vanes, two diametrically opposite bosses 20 are provided projecting inwardly of the body. As shown in Figures 3 and 4, each boss 20 is hollow, define in a recess 21 open to the exterior of the body, but closed to the interior of the body by an end wall 22. At the inner end of the recess, a shallow depression 23 is provided in the end wall 22. The mouth of the recess is constricted by an annular rim I whose surface is fad-fussed in cross-section.
The container includes a carrying handle 30, only part of which is illustrated in Figures 3 and 4. The handle is also mounded and is of the yore type, convent tonal in paint cans, in which the handle is generally of inverted U-shape and bridges the mouth of the can in the carrying position, the free end of each leg of the U be-in pivotal mounted on the cylindrical wall ox the can.
In Figure 3, the end part- of one leg 31 of the handle 30 is shown, and this carries a spigot 32 extend-in axially perpendicularly -to the length of the leg 31.
The other leg of the handle (not shown) is similarly formed, with the two spigots lying on a common axis and extending towards each other. Each spigot engages in a corresponding one of -the recesses 21.
Each spigot 32 is provided with a pair (or more) of axially spaced peripheral ribs 33, 34, each of which is roadside in cross-section. These ribs engage and slide on the internal peripheral wall of the respective recess 21 to facilitate pivotal movement of the spigots in the recesses.
Each annular rim 24 similarly slid ably engages with the external surface of the respective spigot and serves to retain the spigot in the recess by cooperation with one of the peripheral ribs 33. The material of the main wall and/or the handle is sufficiently resilient to allow for snap-engagement of each spigot in its recess.
On the free end wall of each spigot is a detent 35, which is engage able with the depression 23 in the end wall 22 of the recess. This locates the handle relative to the body in a given position and resiliently resists movement from that position. This prevents the handle from being moved by vibration during conveyance ox the containers for filling and fitting of lids.
The vanes 17 prevent swirling of liquid in the con-trainer, during handling, and thereby prevent spillage Before fitting of the handle, the cylindrical wall of the container has a smooth exterior, with no project lions, which can easily be printed The handle I may comprise a resiliently flexible length of material having -the spigots 32 formed on each end, the flexibility allowing for bending of the spigot ends relative to the adjacent parts of the handle, in-stead of the spigots being formed perpendicularly to the adjacent parts of the handle.
This invention relates to injection mounded contain-ens.
Paint and similar materials are usually sold in met-at containers of the type having a body, a cylindrical side wall and a mouth at the top defined by a radially inwardly projecting rim This rim defines a drip channel and tightly receives a plug-fitting lid. A carrying handle is mounted in yoke fashion on the side wall with opposite end parts of the handle pivotal mounted on external projections on the side wall. The external sun-face of the side wall is directly printed.
Printing is carried out on a blank of sheet metal prior to forming of the side wall of the container from the sheet. A pair of projections is riveted to the side wall after printing and each projection extends to the exterior of the side wall with a formation for receiving a respective end part of the handle.
It has become desirable for container of this type to be manufactured by injection mounding without losing the character of the metal container. Such a container has to be printed on a cylindrical side wall and it is important that the exterior surface of the side wall is smooth to facilitate printing. Any projections on the exterior surface of the side wall would interfere with the printing process or make this difficult to carry out.
This has been avoided by welding projecting formations onto the surface after printing and then pivotal ail-aching the handle to the formations This has the disadvantages that two welding steps 30 have to be carried out on each container and the result-ant weld is liable to break, so that, after filling the container there are a number of rejects.
The present invention is concerned with eliminating the welding step and providing a more reliable connection 3 3 Jo of the handle to the container body, without making the printing process more difficult to carry out.
The present invention is characterized in that, prior to fitting of the handle, the circumferential en-vernal surface of the side wall is smooth without any projections, a pair of diametrically opposite internal projections extend radially inwardly from the inner sun-face of the side wall, each projection having a recess open to the exterior of the body, each end part of the handle having a spigot which pivotal seats in the corn-responding one of the recesses, and retaining means no-twining each spigot in the recess.
French Certificate d'Utilite' No. 7411108 discloses a barrel-shaped plastics mounding, whose body is made in two halves sealed together along their edges A separate top is secured to the body and has a narrow neck for no-ceiling a stopper. The neck has inwardly extending pro-sections which receive trunnions of a handle. This is a complicated construction, which could not be made in one piece by injection mounding and has no relation to the type of container with which the invention is concerned.
It would not be obvious to a skilled person faced with the problem solved by the present invention, to injection - mound the container with inward projections in the body side wall, if this French publication was available to him. The problem is not relevant to this publication and adaption of a container of the type for holding paint to the construction shown in this publication would render the container useless for its intended purposes, as well as making it impossible to produce by injection mounding.
Furthermore, it would be impossible to make a con-trainer of the type envisaged by the present invention by blow-moulding. In addition, blow-moulding produces a container with walls of uneven thickness, so that very thick walls would be required for a container of suffice tent strength, as compared with -the very thin and strong walls which can be achieved by injection mounding in polypropylene. The external finish of a blow-moulded container is also poor and the smooth printed finish ail-Anabel by the present invention is not attainable byblow-moulding techniques.
In the preferred construction, pivotal movement is facilitated by the provision of spaced annular ribs on a spigot of the handle, which ribs define bearings mourn-ailed in the recess. This ensures that the handle cannot bind and be held in a raised position, which would inter-lore with automatic handling of the containers, e.g. dun-in filling. One of these ribs co-operates with a shoulder at the entrance to the recess to retain the handle in the recess. The arrangement is such that the spigots can automatically be pushed into the recesses to provide the pivotal inter-connections, the shoulder and/or the ribs being resilient to provide for snap-engagement The spigot is pivotal movable relative to the body of the container and this could cause a problem in mock-apical handling for filling the container. There is some vibration during conveyance and the handles could move into positions where they interfere with the process.
This is prevented by providing the end of each spigot and the adjacent end wall of the respective recess with rest iliently interengageable parts, which define location means for resiliently holding the handle in a given post-lion. The handle may be held positively in a precise position, or resiliently prevented from passing a precise position until small force is applied to the handle.
Reference is now made to the accompanying drawings, wherein:-Figure 1 is a side elevation of a body of a contain-or according to the invention, shown partly in cross-- -section;
Figure 2 is an underneath plan view of the container body;
Figure 3 is an enlarged detail view in cross-section showing how a handle is attached to the body of the con-trainer; and Figure 4 is an enlarged perspective view, partly in section, of a detail of the container showing a connect lion of the handle to the body.
The container shown in Figure 1 is a one-piece in-section mounding and has a bottom 11, a main cylindrical wall 12 and an open mouth 13 surrounded by an inwardly extending peripheral rim 14, formed as a drip channel.
As shown in Figure 2 the bottom 11 is reinforced by a pattern of integral radial and circular ribs 15, 16.
The cylindrical wall 12 is provided internally with integral vanes 17 adjacent the rim 14, the vanes being spaced around the wall.
elbow the vanes, two diametrically opposite bosses 20 are provided projecting inwardly of the body. As shown in Figures 3 and 4, each boss 20 is hollow, define in a recess 21 open to the exterior of the body, but closed to the interior of the body by an end wall 22. At the inner end of the recess, a shallow depression 23 is provided in the end wall 22. The mouth of the recess is constricted by an annular rim I whose surface is fad-fussed in cross-section.
The container includes a carrying handle 30, only part of which is illustrated in Figures 3 and 4. The handle is also mounded and is of the yore type, convent tonal in paint cans, in which the handle is generally of inverted U-shape and bridges the mouth of the can in the carrying position, the free end of each leg of the U be-in pivotal mounted on the cylindrical wall ox the can.
In Figure 3, the end part- of one leg 31 of the handle 30 is shown, and this carries a spigot 32 extend-in axially perpendicularly -to the length of the leg 31.
The other leg of the handle (not shown) is similarly formed, with the two spigots lying on a common axis and extending towards each other. Each spigot engages in a corresponding one of -the recesses 21.
Each spigot 32 is provided with a pair (or more) of axially spaced peripheral ribs 33, 34, each of which is roadside in cross-section. These ribs engage and slide on the internal peripheral wall of the respective recess 21 to facilitate pivotal movement of the spigots in the recesses.
Each annular rim 24 similarly slid ably engages with the external surface of the respective spigot and serves to retain the spigot in the recess by cooperation with one of the peripheral ribs 33. The material of the main wall and/or the handle is sufficiently resilient to allow for snap-engagement of each spigot in its recess.
On the free end wall of each spigot is a detent 35, which is engage able with the depression 23 in the end wall 22 of the recess. This locates the handle relative to the body in a given position and resiliently resists movement from that position. This prevents the handle from being moved by vibration during conveyance ox the containers for filling and fitting of lids.
The vanes 17 prevent swirling of liquid in the con-trainer, during handling, and thereby prevent spillage Before fitting of the handle, the cylindrical wall of the container has a smooth exterior, with no project lions, which can easily be printed The handle I may comprise a resiliently flexible length of material having -the spigots 32 formed on each end, the flexibility allowing for bending of the spigot ends relative to the adjacent parts of the handle, in-stead of the spigots being formed perpendicularly to the adjacent parts of the handle.
Claims (8)
1. A container comprising:
a) a body formed as a single injection moulding in-cluding a cylindrical wall with a smooth external surface having no external projections, a bottom closing one end of the cylindrical wall, a rim adjacent the opposite end of the cylindrical wall, the rim projecting radially in-wardly and defining a mouth, the rim being adapted to receive a plug-fitting lid to close the mouth, a pair of bosses at diametrically opposite sides of the cylindrical wall and projecting from an internal surface thereof to-wards each other, each boss having an opening at the ex-ternal surface of the cylindrical wall and defining a socket, retaining means formed within the socket, and b) a handle mountable in yoke fashion on the body, the handle comprising a strap and a pair of spigots, one at each end of the strap, each spigot being received in a respective one of said sockets and engaging with the retaining means therein, whereby the handle is rotatably retained on the body.
a) a body formed as a single injection moulding in-cluding a cylindrical wall with a smooth external surface having no external projections, a bottom closing one end of the cylindrical wall, a rim adjacent the opposite end of the cylindrical wall, the rim projecting radially in-wardly and defining a mouth, the rim being adapted to receive a plug-fitting lid to close the mouth, a pair of bosses at diametrically opposite sides of the cylindrical wall and projecting from an internal surface thereof to-wards each other, each boss having an opening at the ex-ternal surface of the cylindrical wall and defining a socket, retaining means formed within the socket, and b) a handle mountable in yoke fashion on the body, the handle comprising a strap and a pair of spigots, one at each end of the strap, each spigot being received in a respective one of said sockets and engaging with the retaining means therein, whereby the handle is rotatably retained on the body.
2. A container according to Claim 1, wherein the re-taining means in each socket comprises an inward projec-tion and an outward projection is provided on each spig-ot, the outward spigot projection being snap-engaged over the inward socket projection.
3. A container according to Claim 2, wherein each spig-ot has a plurality of radially outwardly projecting annu-lar ribs spaced axially along the spigot, the ribs defin-ing rotary bearings journalled in the respective socket and one of said annular ribs defining said outward pro-jection.
4. A container according to Claim 2, wherein each in-ward socket projection is defined by an annular flange and each outward spigot projection is defined by an annular rib.
5. A container according to Claim 1, wherein at least one spigot and its corresponding socket are provided with resiliently co-operable parts defining resilient stop means which locate the handle in a given position rela-tive to the body, the handle being movable to rotate the spigots to overcome the resilience of the stop means.
6. A container according to Claim 5, wherein the axial inner end of said spigot is provided with one of said co-operable parts, the other of said parts being provided on the bottom wall of the socket.
7. A container according to Claim 1, 2 or 4, wherein the rim comprises a radially extending flange spaced from said opposite end of the cylindrical wall and an axially extending flange carried by the radially extending flange and defining an annular channel with the cylindrical wall.
8. A container according to Claim 1, 2 or 4, wherein the bottom is spaced from said one end of the cylindrical wall and defines a shallow recess at the bottom of the container body, and reinforcing ribs integrally moulded with the body in said recess at least some of said ribs being joined to both said bottom and said cylindrical wall.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA000484226A CA1231312A (en) | 1985-06-17 | 1985-06-17 | Injection moulded container |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA000484226A CA1231312A (en) | 1985-06-17 | 1985-06-17 | Injection moulded container |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1231312A true CA1231312A (en) | 1988-01-12 |
Family
ID=4130727
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000484226A Expired CA1231312A (en) | 1985-06-17 | 1985-06-17 | Injection moulded container |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA1231312A (en) |
-
1985
- 1985-06-17 CA CA000484226A patent/CA1231312A/en not_active Expired
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |