CA1335247C - Vacuum drainage collecting device - Google Patents
Vacuum drainage collecting deviceInfo
- Publication number
- CA1335247C CA1335247C CA 613064 CA613064A CA1335247C CA 1335247 C CA1335247 C CA 1335247C CA 613064 CA613064 CA 613064 CA 613064 A CA613064 A CA 613064A CA 1335247 C CA1335247 C CA 1335247C
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- CA
- Canada
- Prior art keywords
- bag
- cover member
- outer cover
- cover
- accordance
- 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 - Fee Related
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Abstract
A disposable cover and bag assembly comprising an outer cover member adapted to be connected to the open end of an outer canister and having a top including therein an opening, an inner cover member in the opening in the top of the outer cover member, and a bag having a mouth gripped between the inner and outer cover members.
Description
VACUUM DRAINAGE COLLECTING DEVICE
BACKGROUND OF THE INVENTION
Field of the Invention The invention relates generally to collection devices and, more particularly, to vacuum operated and at least partially disposable collection devices.
Still more particularly, the invention relates to collection devices including a flexible bag or liner which is supported by a canister cover and located within a rigid canister connected to the canister cover.
Reference to the Prior Art In the past, liners or bags have been secured to a canister cover by heat sealing and/or by the use of a heat sealant. Bags or liners made from a plasticized flexible polyvinylchloride can be welded by using electrodes and a radio frequency electrical supply. When a flexible bag or liner is composed of polyethylene it can be welded or fused to a stiffer polyethylene canister cover by using a heated electrode.
Whatever materials have been used in the past to manufacture the bag or liner and the canister cover, all such products have relied on fusing the bag or liner to the canister cover.
Furthermore, and in order to facilitate such fusing, both the bag or liner and the canister cover have been made from compatible materials, for example, flexible polyvinylchloride to rigid polyvinylchloride, or low-density polyethylene to high-density polyethylene. In all cases, uniform and controlled pressure has to be applied at the point of attachment of the bag or liner to the canister cover. In addition, the energy applied, whether resistance or radio frequency current, has to be accurately controlled, as does the duration of its application. Fluctuations in these conditions can lead to missed areas or weak areas of fusion when the heat, pressure, or duration is insufficient, or the electrode may push through the wall of the thin bag or liner when the heat, pressure, or duration is excessive. Suffice to say that the process of fusing the two parts together is such as to lead to a percentage of rejects and to frequent testing to ensure that conditions are optimum.
Any product requiring two parts to be fused together, must employ parts of compatible material. Such compatibility requirements would have to take precedence over optimum performance for each part. While flexible plasticized polyvinylchloride not only affords crystal clarity but great flexibility, properties very desirable in a bag or liner, such material cannot be fused to a high-density polyethylene canister cover whose properties most suit the performance of the canister cover.
Attention is directed to U.S. Patent 3,680,560 dated August 1, 1972.
SUMMARY OF THE INVENTION
The invention provides a disposable cover and bag assembly comprising an outer cover member adapted to be connected to the open end of an outer canister and having a top including therein an opening, an inner cover member in the opening in the top of the outer cover member, and a bag having a mouth gripped between the inner and outer cover members.
The invention also provides a collection apparatus with a disposable portion comprising an outer canister having an open end, an outer cover member detachably connected to the open end and having a top including therein an opening, an inner cover member in the opening in the top of the outer cover member, and a bag extending in the outer canister and having a mouth gripped between the inner and outer cover members.
- t 3352~7 The invention also provides a method of fabricating a disposable cover and bag assembly, which method comprises the steps of supporting an outer cover member having a top surface including therein an opening, inserting, through the opening in the top surface of the outer cover, a bag with an open mouth and with a portion extending outwardly from the mouth in overlying relation to the top surface of the outer cover member and with a part extending beyond the top surface of the outer cover member, gripping the bag part extending beyond the top surface of the outer cover member, inserting an inner cover member into the mouth of the bag and into frictional engagement with the inner cover member to form a cover and bag assembly with the mouth of the bag gripped between the inner and outer cover members, and releasing the grip on the bag part.
The invention also provides a disposable cover and bag assembly comprising a lower cover member including a top having therein an opening, an upper cover member closing the opening in the top of the lower cover member, and a bag having a mouth gripped between the cover members, one of the cover members being adapted to be connected to the open end of an outer canister, and the cover members including inter-engaging means affording assembly of the cover members and preventing disassembly of the cover members, the inter-engaging means comprising a non-threaded serrated formation on each of the cover members, each of the serrated formations including a plurality of parallel, endless projections defining grooves there between, the projections of each of the formations being received in the grooves of the other of the formations, and the bag being clamped between the formations.
The invention also provides a disposable cover and bag assembly comprising an outer cover member adapted to be connected to the open end of an outer canister and having a top including 1 33~247 therein an opening, an inner cover member in the opening in the top of the outer cover member, and a bag having a mouth gripped between the inner and outer cover members, the inner and outer cover members including inter-engaging means affording assembly of the inner and outer cover members and preventing disassembly of the inner and outer cover members, the inter-engaging means comprising a non-threaded serrated formation on each of the inner and outer cover members, each of the serrated formations including a plurality of parallel, endless projections defining grooves there between, the projections of each of the formations being received in the grooves of the other of the formations, and the bag being clamped between the formations.
The invention also provides a collection apparatus with a disposable portion comprising an outer canister having an open end, an outer cover member detachably connected to the open end and having a top including therein an opening, an inner cover member in the opening in the top of the outer cover member, and a bag extending in the outer canister and having a mouth gripped between the inner and outer cover members, the inner and outer cover members including inter-engaging means affording assembly of the inner and outer cover members and preventing disassembly of the inner and outer cover members, the inner-engaging means comprising a non-threaded serrated formation on each of the inner and outer cover members, each of the serrated formations including a plurality of parallel, endless projections defining grooves there between, the projections of each of the formations being received in the grooves of the other of the formations, and the bag being clamped between the formations.
The invention also provides a disposable cover and bag assembly comprising an outer cover member adapted to be connected to the open end of an outer canister and having a top including therein an opening, an inner cover member in the opening in the top of the outer cover member, a bag having a mouth gripped between the inner and outer cover members, and means on the inner and outer cover members for clamping the bag there between, the means including on one of the cover members a serrated formation for cammingly engaging the other of the cover members and for clamping the bag between the serrated formation and the other of the cover members.
The invention also provides a collection apparatus with a disposable portion comprising an outer canister having an open end, an outer cover member detachably connected to the open end and having a top including therein an opening, an inner cover member in the opening in the top of the outer cover member, a bag extending in the outer canister and having a mouth gripped between the inner and outer cover members, and means on the inner and outer cover members for clamping the bag there between, the means including on one of the cover members a serrated formation for cammingly engaging the other of the cover members and for clamping the bag between the serrated formation and the other of the cover members.
One of the features of the invention is to use otherwise incompatible materials for the bag or liner and for the canister cover, each chosen for its specific duty.
Other features and advantages of the invention will become apparent to those skilled in the art upon review of the following detailed description, claims, and drawings.
THE DRAWINGS
Figure 1 is a partially broken away and sectioned perspective view of a collection device embodying various of the features of the invention.
_ ~, Figure 2 is an enlarged, fragmentary, sectional view taken along line 2-2 of Figure 1.
Figure 3 is a partially schematic view of a device for assembling a cover and bag assembly embodied in the collection device shown in Figure 1.
Figure 4 is a view similar to Figure 3, but illustrating certain components in somewhat different positions.
Before one embodiment of the invention is explained in detail, it is to be understood that the invention is not limited in its application to the details of the construction and the arrangements of components set forth in the following description or illustrated in the drawings. The invention is capable of other embodiments and of being practiced or being carried out in various ways. Also, it is to be understood that the phraseology and terminology used herein is for the purpose of description and should not be regarded as limiting.
GENERAL DE SCR I PT I ON
Illustrated in the drawings is a vacuum drainage collection apparatus 11 including a rigid canister 13 having a continuous side wall 15, a closed bottom 17, and an open upper end or top 19.
Closing the open top 19 of the canister 13 is a disposable cover and bag assembly 21 including an outer cover member or ring 23 having a top including therein an opening 27, a bag or liner 29 having an open mouth 31 extending through the opening 27 in the top of the outer cover member or ring 23, and an inner cover member 35 extending into the mouth 31 of the bag 29 and gripping the outer cover member or ring 23 to clamp the mouth 31 of the bag between the outer and inner cover members 23 and 33.
More particularly, the canister 13 can be fabricated of any desired rigid material and can be either of metal or plastic.
The outer cover member or ring 23 can be fabricated of various materials, such as a propylene/ethylene copolymer, or polypropylene, or a polyvinyl chloride/ethyl vinyl acetate blend. ln addition, semirigid thermoplastic elastomers can also be employed. The outer cover member or ring 23 includes a generally cylindrical main body section 41 having an inner surface 43 defining the opening 27, an outer surface 45, a top surface 47 joining the inner and outer surfaces 43 and 45 and a lower end 49. The outer cover member or ring 23 also includes an outer supporting sec-tion 51 which extends from about the mid-portion of the outer surface 45 of the cylindrical section 41 and then downwardly therefrom, forming a cylindrical cavity or groove or space 53 for frictional receipt therein of the open upper end or top 19 of the r gid canister 13. Such receipt can afford a seal between the outer cover member or ring 23 and the canister 13, while, at the same time, affording disassembly of the canister 13 from the cover and bag assembly 21.
The supporting section 51 also includes, at the axially outer or lower end thereof, a radially outwardly extending flange or foot 55 for purposes to be disclosed hereinafter.
The bag or liner 29 can be formed of any desired flexible sheet plastic and comprises a main body 57 which extends into and, in general, occupies the volume within the rigid canister 13 and which incorporates a closed lower end S9. At its upper end, the main body 57 includes the open mouth 31 which has a size closely approximating the size of the opening 27 in the outer cover member or ring 23.
In addition the bag or liner 29 includes a flange 61 extending radially outwardly across the top surface 47 of the outer cover member or ring 23 and includes a part 63 extending beyond the perimeter of the outer cover member or ring 23. As will hereinafter be explained, the part 63 of the flange extending beyond the outer cover member 23 is subsequently trimmed from the resulting cover and bag assembly 21.
The bag or liner 29 can be fabricated of various materials and is preferably fabricated from a flexible plasticized polyvinylchloride calendared sheet by cutting, forming and radio frequency welding or, _ q_ ~ 335247 preferably, is blow molded in one piece to provide a closed balloon prior to cutting off at one end, i.e., the top, leaving the bag or liner 29 with the extending flange or portion 61. Typically, and for example, the bag or liner 29 could have a wall thickness of .007" and a Shore A scale hardness of 85. Other materials which can be used for the bag or liner 29 include clear polyurethane, transluscent, low, medium or high density polyethylene, and transluscent polyethylene/ethylvinyl acetate copolymers.
As illustrated, the flange 61 is shown in a flat plane, perpendicular to the mouth 31 of the bag or liner 29. However, since as will be explained, the purpose of the flange 61 is to facilitate holding and clamping the bag or liner 29 during assembly of the bag 29 with the inner and outer cover members 23 and 33, and since, after assembly, the part of the flange extending beyond the outer cover member or ring 23 is automatically trimmed off, the specific form of the flange can be any other suitable shape, such as at an angle to the side wall of the bag or liner 29.
The inner cover member 33 can be fabricated of various materials and is preferably fabricated of relatively rigid plastic such as unplasticized polyvinylchloride. Other materials which can be employed include polypropylene and -- 1 3352~7 impact improved polystyrene. The inner cover member 31 comprises a main body or top wall 71 which includes a pouring spout, a vacuum passage 73 affording the creation of a vacuum in the bag or liner 29, a float, a schematically illustrated passage 75 through which fluids can be passed to the bag or liner 29 and a filter. These features in the top wall 71 are all known in the art and need not be further disclosed.
Also forming a part of the inner cover member 33 is a projecting cylindrical section 81 which projects downwardly from the top wall 71 and is inserted into the mouth 31 of the bag or liner 29 and into frictional engagement with the inner surface 43 of the cylindrical section 41 of the outer cover member or ring 23 so as to grip or clamp the mouth 31 of the bag or liner 29 between the inner and outer cover members 23 and 33. Preferably, the top wall 71 includes a rim 83 which extends radially and outwardly beyond the depending cylindrical section 81 and into covering relation to the top surface 47 of the outer cover member or ring 23.
As a consequence, the upper end of the bag or liner 29 is retained between the respective cylindrical sections 41 and 81 of the inner and outer cover members 23 and 33 and between the top surface 47 of the outer cover member or ring 23 and the outwardly extending rim 83 of the inner cover member 33.
I I
~- 1 335247 Means are provided on the cylindrical sections 41 and 81 for inter-engagement therebetween to tightly grip or clamp the mouth 31 of the bag or liner 29 therebetween and to prevent disassembly of the inner and outer cover members 23 and 33.
While other constructions can be employed, in the disclosed construction, such means comprises, on each of the inner and outer cover members 23 and 33, respective serrated formations 91 and 93 in the form of a series of serrations-provided by a series of annular parallel projections and grooves which form annular teeth, which serrated formations can, in the presence of suitable axial force, be inter-fitted to prevent subsequent disassembly of the inner and outer cover members 23 and 33 and, at the same time, will effect tight clamping of the bag or liner 29 between the inner and outer members 23 and 33 without causing ripping or tearing of the mouth 31 of the bag or liner 29.
The serrations 91 and 93 are symmetrical in form, preferably having a 45 angle;
and each serration or tooth is parallel to the other and is not helical as in a screw thread.
While the disclosed construction includes the illustrated pointed serrated formations 91 and 93, the serrations need not come to a point, but could be truncated. In addition, other constructions could be employed.
-l2 In assembly of the cover and bag assembly 21, the annular foot 55 of the outer cover member or ring 23 is placed on an anvil 99 having a supporting surface 101 of a mandrel or manual press 9S or other suitable machine, which anvil 99 includes an annular inner lip 103 extending into the annular space or cavity 53 formed at the lower end of the supporting section 51. The anvil 99 also extends upwardly in generally surrounding relation to the radially outer end of the annular foot 55 and terminates in an upper annular surface 105 which is generally co-planar with the top surface 47 of the outer cover member or ring 23.
A disposable bag or liner 29 is then dropped or inserted into and through the opening 27 in the top of the cylindrical section 41 of the outer cover member or ring 23 so that the mouth 31 of the bag or liner 29 contacts the inner surface 43 adjacent the top surface 47 and so that the flange 61 extends outwardly into over-lapping relation to the upper annular surface 105 of the press.
The flange 61 is then clamped or gripped to the upper annular surface 105 by an annular anchor ring 107 which is moved into engagement with the flange part 63 to hold the flange part 63 tightly between the anchor ring 107 and the upper annular surface 105.
The inner cover member 33 is then located in the mouth 31 of the bag or lever 29 and pressed rapidly inwardly into the opening 27 until the rim 83 engages the top surface 47 of the outer cover member or ring 23. Such movement causes the outer cover member or ring 23 to expand within the elastic limit as the serrations engage. As a consequence the mouth 31 of the bag or liner 29 is now firmly gripped or clamped between the engaged serrations of the inner and outer cover members 23 and 33, and is thus deformed to duplicate the profile of the serrations.
Notwithstanding that the inner cover member 23 is placed under compression during assembly, the inner cover member, and in addition, the serrated formation, has inherent resistance to compressive loads. Furthermore, the cylindrical section 81 is reinforced by the top wall 71 of the inner cover member 33. As a consequence, the inner cover member 33 is minimally deformed. On the other hand, the outer cover member or ring 23 is free to expand and subsequently return to its original diameter (except for the interposition of the bag or liner 29). After assembly, the outer cover member or ring 23 maintains constant compression on the bag or liner 29.
When the inner and outer cover members 23 and 33 are molded size on size to provide the serrations or teeth, the bag or liner 29 with a O.007" wall can be readily accommodated between the two cover members 23 and 33 without undesirably stretching the bag or liner material when the inner and outer cover members 23 and 33 are molded from high-density polyethylene. Bags or liners of heavier gauge can be accommodated, except that proportional clearances between the serrations have to be incorporated into the inner and outer cover members 23 and 33.
Thereafter, the anchor ring 107 is withdrawn, releasing the grip on the flange part 63 and the cover and bag assembly 21 can then be removed from the press. Subsequently, the flange part 63 extending from the cover and bag assembly 21 is trimmed from the cover and bag assembly 21 to provide a neat appearance. Still more subsequently, the rigid canister 13 can be removably assembled into the annular groove or space 53 in the bottom of the outer cover member or ring 23 to provide support for the contents to be delivered into the bag or lever 29.
Various of the features of the invention are set forth in the following claims.
-l 5
BACKGROUND OF THE INVENTION
Field of the Invention The invention relates generally to collection devices and, more particularly, to vacuum operated and at least partially disposable collection devices.
Still more particularly, the invention relates to collection devices including a flexible bag or liner which is supported by a canister cover and located within a rigid canister connected to the canister cover.
Reference to the Prior Art In the past, liners or bags have been secured to a canister cover by heat sealing and/or by the use of a heat sealant. Bags or liners made from a plasticized flexible polyvinylchloride can be welded by using electrodes and a radio frequency electrical supply. When a flexible bag or liner is composed of polyethylene it can be welded or fused to a stiffer polyethylene canister cover by using a heated electrode.
Whatever materials have been used in the past to manufacture the bag or liner and the canister cover, all such products have relied on fusing the bag or liner to the canister cover.
Furthermore, and in order to facilitate such fusing, both the bag or liner and the canister cover have been made from compatible materials, for example, flexible polyvinylchloride to rigid polyvinylchloride, or low-density polyethylene to high-density polyethylene. In all cases, uniform and controlled pressure has to be applied at the point of attachment of the bag or liner to the canister cover. In addition, the energy applied, whether resistance or radio frequency current, has to be accurately controlled, as does the duration of its application. Fluctuations in these conditions can lead to missed areas or weak areas of fusion when the heat, pressure, or duration is insufficient, or the electrode may push through the wall of the thin bag or liner when the heat, pressure, or duration is excessive. Suffice to say that the process of fusing the two parts together is such as to lead to a percentage of rejects and to frequent testing to ensure that conditions are optimum.
Any product requiring two parts to be fused together, must employ parts of compatible material. Such compatibility requirements would have to take precedence over optimum performance for each part. While flexible plasticized polyvinylchloride not only affords crystal clarity but great flexibility, properties very desirable in a bag or liner, such material cannot be fused to a high-density polyethylene canister cover whose properties most suit the performance of the canister cover.
Attention is directed to U.S. Patent 3,680,560 dated August 1, 1972.
SUMMARY OF THE INVENTION
The invention provides a disposable cover and bag assembly comprising an outer cover member adapted to be connected to the open end of an outer canister and having a top including therein an opening, an inner cover member in the opening in the top of the outer cover member, and a bag having a mouth gripped between the inner and outer cover members.
The invention also provides a collection apparatus with a disposable portion comprising an outer canister having an open end, an outer cover member detachably connected to the open end and having a top including therein an opening, an inner cover member in the opening in the top of the outer cover member, and a bag extending in the outer canister and having a mouth gripped between the inner and outer cover members.
- t 3352~7 The invention also provides a method of fabricating a disposable cover and bag assembly, which method comprises the steps of supporting an outer cover member having a top surface including therein an opening, inserting, through the opening in the top surface of the outer cover, a bag with an open mouth and with a portion extending outwardly from the mouth in overlying relation to the top surface of the outer cover member and with a part extending beyond the top surface of the outer cover member, gripping the bag part extending beyond the top surface of the outer cover member, inserting an inner cover member into the mouth of the bag and into frictional engagement with the inner cover member to form a cover and bag assembly with the mouth of the bag gripped between the inner and outer cover members, and releasing the grip on the bag part.
The invention also provides a disposable cover and bag assembly comprising a lower cover member including a top having therein an opening, an upper cover member closing the opening in the top of the lower cover member, and a bag having a mouth gripped between the cover members, one of the cover members being adapted to be connected to the open end of an outer canister, and the cover members including inter-engaging means affording assembly of the cover members and preventing disassembly of the cover members, the inter-engaging means comprising a non-threaded serrated formation on each of the cover members, each of the serrated formations including a plurality of parallel, endless projections defining grooves there between, the projections of each of the formations being received in the grooves of the other of the formations, and the bag being clamped between the formations.
The invention also provides a disposable cover and bag assembly comprising an outer cover member adapted to be connected to the open end of an outer canister and having a top including 1 33~247 therein an opening, an inner cover member in the opening in the top of the outer cover member, and a bag having a mouth gripped between the inner and outer cover members, the inner and outer cover members including inter-engaging means affording assembly of the inner and outer cover members and preventing disassembly of the inner and outer cover members, the inter-engaging means comprising a non-threaded serrated formation on each of the inner and outer cover members, each of the serrated formations including a plurality of parallel, endless projections defining grooves there between, the projections of each of the formations being received in the grooves of the other of the formations, and the bag being clamped between the formations.
The invention also provides a collection apparatus with a disposable portion comprising an outer canister having an open end, an outer cover member detachably connected to the open end and having a top including therein an opening, an inner cover member in the opening in the top of the outer cover member, and a bag extending in the outer canister and having a mouth gripped between the inner and outer cover members, the inner and outer cover members including inter-engaging means affording assembly of the inner and outer cover members and preventing disassembly of the inner and outer cover members, the inner-engaging means comprising a non-threaded serrated formation on each of the inner and outer cover members, each of the serrated formations including a plurality of parallel, endless projections defining grooves there between, the projections of each of the formations being received in the grooves of the other of the formations, and the bag being clamped between the formations.
The invention also provides a disposable cover and bag assembly comprising an outer cover member adapted to be connected to the open end of an outer canister and having a top including therein an opening, an inner cover member in the opening in the top of the outer cover member, a bag having a mouth gripped between the inner and outer cover members, and means on the inner and outer cover members for clamping the bag there between, the means including on one of the cover members a serrated formation for cammingly engaging the other of the cover members and for clamping the bag between the serrated formation and the other of the cover members.
The invention also provides a collection apparatus with a disposable portion comprising an outer canister having an open end, an outer cover member detachably connected to the open end and having a top including therein an opening, an inner cover member in the opening in the top of the outer cover member, a bag extending in the outer canister and having a mouth gripped between the inner and outer cover members, and means on the inner and outer cover members for clamping the bag there between, the means including on one of the cover members a serrated formation for cammingly engaging the other of the cover members and for clamping the bag between the serrated formation and the other of the cover members.
One of the features of the invention is to use otherwise incompatible materials for the bag or liner and for the canister cover, each chosen for its specific duty.
Other features and advantages of the invention will become apparent to those skilled in the art upon review of the following detailed description, claims, and drawings.
THE DRAWINGS
Figure 1 is a partially broken away and sectioned perspective view of a collection device embodying various of the features of the invention.
_ ~, Figure 2 is an enlarged, fragmentary, sectional view taken along line 2-2 of Figure 1.
Figure 3 is a partially schematic view of a device for assembling a cover and bag assembly embodied in the collection device shown in Figure 1.
Figure 4 is a view similar to Figure 3, but illustrating certain components in somewhat different positions.
Before one embodiment of the invention is explained in detail, it is to be understood that the invention is not limited in its application to the details of the construction and the arrangements of components set forth in the following description or illustrated in the drawings. The invention is capable of other embodiments and of being practiced or being carried out in various ways. Also, it is to be understood that the phraseology and terminology used herein is for the purpose of description and should not be regarded as limiting.
GENERAL DE SCR I PT I ON
Illustrated in the drawings is a vacuum drainage collection apparatus 11 including a rigid canister 13 having a continuous side wall 15, a closed bottom 17, and an open upper end or top 19.
Closing the open top 19 of the canister 13 is a disposable cover and bag assembly 21 including an outer cover member or ring 23 having a top including therein an opening 27, a bag or liner 29 having an open mouth 31 extending through the opening 27 in the top of the outer cover member or ring 23, and an inner cover member 35 extending into the mouth 31 of the bag 29 and gripping the outer cover member or ring 23 to clamp the mouth 31 of the bag between the outer and inner cover members 23 and 33.
More particularly, the canister 13 can be fabricated of any desired rigid material and can be either of metal or plastic.
The outer cover member or ring 23 can be fabricated of various materials, such as a propylene/ethylene copolymer, or polypropylene, or a polyvinyl chloride/ethyl vinyl acetate blend. ln addition, semirigid thermoplastic elastomers can also be employed. The outer cover member or ring 23 includes a generally cylindrical main body section 41 having an inner surface 43 defining the opening 27, an outer surface 45, a top surface 47 joining the inner and outer surfaces 43 and 45 and a lower end 49. The outer cover member or ring 23 also includes an outer supporting sec-tion 51 which extends from about the mid-portion of the outer surface 45 of the cylindrical section 41 and then downwardly therefrom, forming a cylindrical cavity or groove or space 53 for frictional receipt therein of the open upper end or top 19 of the r gid canister 13. Such receipt can afford a seal between the outer cover member or ring 23 and the canister 13, while, at the same time, affording disassembly of the canister 13 from the cover and bag assembly 21.
The supporting section 51 also includes, at the axially outer or lower end thereof, a radially outwardly extending flange or foot 55 for purposes to be disclosed hereinafter.
The bag or liner 29 can be formed of any desired flexible sheet plastic and comprises a main body 57 which extends into and, in general, occupies the volume within the rigid canister 13 and which incorporates a closed lower end S9. At its upper end, the main body 57 includes the open mouth 31 which has a size closely approximating the size of the opening 27 in the outer cover member or ring 23.
In addition the bag or liner 29 includes a flange 61 extending radially outwardly across the top surface 47 of the outer cover member or ring 23 and includes a part 63 extending beyond the perimeter of the outer cover member or ring 23. As will hereinafter be explained, the part 63 of the flange extending beyond the outer cover member 23 is subsequently trimmed from the resulting cover and bag assembly 21.
The bag or liner 29 can be fabricated of various materials and is preferably fabricated from a flexible plasticized polyvinylchloride calendared sheet by cutting, forming and radio frequency welding or, _ q_ ~ 335247 preferably, is blow molded in one piece to provide a closed balloon prior to cutting off at one end, i.e., the top, leaving the bag or liner 29 with the extending flange or portion 61. Typically, and for example, the bag or liner 29 could have a wall thickness of .007" and a Shore A scale hardness of 85. Other materials which can be used for the bag or liner 29 include clear polyurethane, transluscent, low, medium or high density polyethylene, and transluscent polyethylene/ethylvinyl acetate copolymers.
As illustrated, the flange 61 is shown in a flat plane, perpendicular to the mouth 31 of the bag or liner 29. However, since as will be explained, the purpose of the flange 61 is to facilitate holding and clamping the bag or liner 29 during assembly of the bag 29 with the inner and outer cover members 23 and 33, and since, after assembly, the part of the flange extending beyond the outer cover member or ring 23 is automatically trimmed off, the specific form of the flange can be any other suitable shape, such as at an angle to the side wall of the bag or liner 29.
The inner cover member 33 can be fabricated of various materials and is preferably fabricated of relatively rigid plastic such as unplasticized polyvinylchloride. Other materials which can be employed include polypropylene and -- 1 3352~7 impact improved polystyrene. The inner cover member 31 comprises a main body or top wall 71 which includes a pouring spout, a vacuum passage 73 affording the creation of a vacuum in the bag or liner 29, a float, a schematically illustrated passage 75 through which fluids can be passed to the bag or liner 29 and a filter. These features in the top wall 71 are all known in the art and need not be further disclosed.
Also forming a part of the inner cover member 33 is a projecting cylindrical section 81 which projects downwardly from the top wall 71 and is inserted into the mouth 31 of the bag or liner 29 and into frictional engagement with the inner surface 43 of the cylindrical section 41 of the outer cover member or ring 23 so as to grip or clamp the mouth 31 of the bag or liner 29 between the inner and outer cover members 23 and 33. Preferably, the top wall 71 includes a rim 83 which extends radially and outwardly beyond the depending cylindrical section 81 and into covering relation to the top surface 47 of the outer cover member or ring 23.
As a consequence, the upper end of the bag or liner 29 is retained between the respective cylindrical sections 41 and 81 of the inner and outer cover members 23 and 33 and between the top surface 47 of the outer cover member or ring 23 and the outwardly extending rim 83 of the inner cover member 33.
I I
~- 1 335247 Means are provided on the cylindrical sections 41 and 81 for inter-engagement therebetween to tightly grip or clamp the mouth 31 of the bag or liner 29 therebetween and to prevent disassembly of the inner and outer cover members 23 and 33.
While other constructions can be employed, in the disclosed construction, such means comprises, on each of the inner and outer cover members 23 and 33, respective serrated formations 91 and 93 in the form of a series of serrations-provided by a series of annular parallel projections and grooves which form annular teeth, which serrated formations can, in the presence of suitable axial force, be inter-fitted to prevent subsequent disassembly of the inner and outer cover members 23 and 33 and, at the same time, will effect tight clamping of the bag or liner 29 between the inner and outer members 23 and 33 without causing ripping or tearing of the mouth 31 of the bag or liner 29.
The serrations 91 and 93 are symmetrical in form, preferably having a 45 angle;
and each serration or tooth is parallel to the other and is not helical as in a screw thread.
While the disclosed construction includes the illustrated pointed serrated formations 91 and 93, the serrations need not come to a point, but could be truncated. In addition, other constructions could be employed.
-l2 In assembly of the cover and bag assembly 21, the annular foot 55 of the outer cover member or ring 23 is placed on an anvil 99 having a supporting surface 101 of a mandrel or manual press 9S or other suitable machine, which anvil 99 includes an annular inner lip 103 extending into the annular space or cavity 53 formed at the lower end of the supporting section 51. The anvil 99 also extends upwardly in generally surrounding relation to the radially outer end of the annular foot 55 and terminates in an upper annular surface 105 which is generally co-planar with the top surface 47 of the outer cover member or ring 23.
A disposable bag or liner 29 is then dropped or inserted into and through the opening 27 in the top of the cylindrical section 41 of the outer cover member or ring 23 so that the mouth 31 of the bag or liner 29 contacts the inner surface 43 adjacent the top surface 47 and so that the flange 61 extends outwardly into over-lapping relation to the upper annular surface 105 of the press.
The flange 61 is then clamped or gripped to the upper annular surface 105 by an annular anchor ring 107 which is moved into engagement with the flange part 63 to hold the flange part 63 tightly between the anchor ring 107 and the upper annular surface 105.
The inner cover member 33 is then located in the mouth 31 of the bag or lever 29 and pressed rapidly inwardly into the opening 27 until the rim 83 engages the top surface 47 of the outer cover member or ring 23. Such movement causes the outer cover member or ring 23 to expand within the elastic limit as the serrations engage. As a consequence the mouth 31 of the bag or liner 29 is now firmly gripped or clamped between the engaged serrations of the inner and outer cover members 23 and 33, and is thus deformed to duplicate the profile of the serrations.
Notwithstanding that the inner cover member 23 is placed under compression during assembly, the inner cover member, and in addition, the serrated formation, has inherent resistance to compressive loads. Furthermore, the cylindrical section 81 is reinforced by the top wall 71 of the inner cover member 33. As a consequence, the inner cover member 33 is minimally deformed. On the other hand, the outer cover member or ring 23 is free to expand and subsequently return to its original diameter (except for the interposition of the bag or liner 29). After assembly, the outer cover member or ring 23 maintains constant compression on the bag or liner 29.
When the inner and outer cover members 23 and 33 are molded size on size to provide the serrations or teeth, the bag or liner 29 with a O.007" wall can be readily accommodated between the two cover members 23 and 33 without undesirably stretching the bag or liner material when the inner and outer cover members 23 and 33 are molded from high-density polyethylene. Bags or liners of heavier gauge can be accommodated, except that proportional clearances between the serrations have to be incorporated into the inner and outer cover members 23 and 33.
Thereafter, the anchor ring 107 is withdrawn, releasing the grip on the flange part 63 and the cover and bag assembly 21 can then be removed from the press. Subsequently, the flange part 63 extending from the cover and bag assembly 21 is trimmed from the cover and bag assembly 21 to provide a neat appearance. Still more subsequently, the rigid canister 13 can be removably assembled into the annular groove or space 53 in the bottom of the outer cover member or ring 23 to provide support for the contents to be delivered into the bag or lever 29.
Various of the features of the invention are set forth in the following claims.
-l 5
Claims (36)
1. A disposable cover and bag assembly comprising an outer cover member adapted to be connected to the open end of an outer canister and having a top including therein an opening, an inner cover member in said opening in said top of said outer cover member, and a bag having a mouth gripped between said inner and outer cover members.
2. A disposable cover and bag assembly in accordance with Claim 1 wherein said bag is fabricated of one material and at least one of said cover members is fabricated of a second material different from said first material.
3. A disposable cover and bag assembly in accordance with Claim 2 wherein said bag is fabricated of polyvinylchloride.
4. A disposable cover and bag assembly in accordance with Claim 2 wherein said one of said cover members is fabricated of polyethylene.
5. A disposable cover and bag assembly in accordance with Claim 1 wherein said inner and outer cover members include inter-engaging means affording assembly of said inner and outer cover members and preventing disassembly of said inner and outer cover members.
6. A disposable cover and bag assembly in accordance with Claim 5 wherein said inter-engaging means comprises a serrated formation on each of said inner and outer cover members.
7. A disposable cover and bag assembly in accordance with Claim 1 wherein said outer cover member includes a cylindrical section including an end surface and an inner surface including, adjacent said end surface, a serrated formation for cammingly engaging said inner cover member.
8. A disposable cover and bag assembly in accordance with Claim 7 wherein said cylindrical section includes an end opposite said end surface, and an outer surface, and an annular supporting section extending from said outer surface of said cylindrical section in spaced relation from said end and including a cylindrical portion extending in generally parallel relation to said cylindrical section and toward said end and defining there between an annular space for receipt therein of a portion of the canister, said cylindrical portion including an outer end, and said supporting section including an annular foot at said outer end of said cylindrical portion and adapted to rest on a supporting surface.
9. A disposable cover and bag assembly in accordance with Claim 7 wherein said inner cover member includes a main body having an outer rim engaging said end surface of said cylindrical section of said outer cover member and a cylindrical section extending from said main body inwardly of said outer rim and having an outer surface with a serrated formation engaging said serrated formation of said cover member.
10. A disposable cover and bag assembly in accordance with Claim 1 wherein said inner cover member includes a passage through which a suction can be drawn.
11. A disposable cover and bag assembly in accordance with Claim 1 wherein said inner cover member includes a passage through which a fluid can pass through said inner cover member.
12. A disposable cover and bag assembly in accordance with Claim 1 wherein said mouth of said bag is mechanically gripped by said inner and outer cover members.
13. A collection apparatus with a disposable portion comprising an outer canister having an open end, an outer cover member detachably connected to said open end and having a top including therein an opening, an inner cover member in said opening in said top of said outer cover member, and a bag extending in said outer canister and having a mouth gripped between said inner and outer cover members.
14. A collection apparatus in accordance with Claim 13 wherein said bag is fabricated of one material and at least one of said cover members is fabricated of a second material different from said first material.
15. A collection apparatus in accordance with Claim 13 wherein said bag is fabricated of polyvinylchloride.
16. A collection apparatus in accordance with Claim 14 wherein said one of said cover members is fabricated of polyethylene.
17. A collection apparatus in accordance with Claim 13 wherein said inner and outer cover members include inter-engaging means affording assembly of said inner and outer cover members and preventing disassembly of said inner and outer cover members.
18. A collection apparatus in accordance with Claim 17 wherein said inter-engaging means comprises a serrated formation on each of said inner and outer cover members.
19. A collection apparatus in accordance with Claim 13 wherein said outer cover member includes a cylindrical section including an end surface and an inner surface including, adjacent said end surface, a serrated formation for cammingly engaging said inner cover member.
20. A collection apparatus in accordance with Claim 19 wherein said cylindrical section includes an end opposite said end surface and an outer surface, and an annular supporting section extending from said outer surface of said cylindrical section in spaced relation from said end and including a cylindrical portion extending in generally parallel relation to said cylindrical section and toward said end and defining therebetween an annular space for receipt therein of a portion of a canister, said cylindrical portion including an outer end, and said supporting section including an annular foot at said outer end of said cylindrical portion and adapted to rest on a supporting surface.
21. A collection apparatus in accordance with Claim 19 wherein said inner cover member includes a main body having an outer rim engaging said end surface of said cylindrical section of said outer cover member and a cylindrical section extending from said main body inwardly of said outer rim and having an outer surface with a serrated formation engaging said serrated formation of said cover member.
22. A method of fabricating a disposable cover and bag assembly, said method comprising the steps of supporting an outer cover member having a top surface including therein an opening, inserting, through the opening in the top surface of the outer cover, a bag with an open mouth and with a portion extending outwardly from the mouth, in overlying relation to the top surface of the outer cover member, and with a part extending beyond the top surface of the outer cover member, gripping the bag part extending beyond the top surface of the outer cover member, inserting an inner cover member into the mouth of the bag and into frictional engagement with the inner cover member to form a cover and bag assembly with the mouth of the bag gripped between the inner and outer cover members, and releasing the grip on the bag part.
23. A method in accordance with Claim 22 and further including the step of trimming from the cover assembly the bag part extending outwardly beyond the top surface of the outer cover member.
24. A disposable cover and bag assembly comprising a lower cover member including a top having therein an opening, an upper cover member closing said opening in said top of said lower cover member, and a bag having a mouth gripped between said cover members, one of said cover members being adapted to be connected to the open end of an outer canister, and said cover members including inter-engaging means affording assembly of said cover members and preventing disassembly of said cover members, said inter-engaging means comprising a non-threaded serrated formation on each of said cover members, each of said serrated formations including a plurality of parallel, endless projections defining grooves there between, said projections of each of said formations being received in said grooves of the other of said formations, and said bag being clamped between said formations.
25. A disposable cover and bag assembly comprising an outer cover member adapted to be connected to the open end of an outer canister and having a top including therein an opening, an inner cover member in said opening in said top of said outer cover member, and a bag having a mouth gripped between said inner and outer cover members, said inner and outer cover members including inter-engaging means affording assembly of said inner and outer cover members and preventing disassembly of said inner and outer cover members, said inter-engaging means comprising a non-threaded serrated formation on each of said inner and outer cover members, each of said serrated formations including a plurality of parallel, endless projections defining grooves there between, said projections of each of said formations being received in said grooves of the other of said formations, and said bag being clamped between said formations.
26. A disposable cover and bag assembly in accordance with Claim 25 wherein said bag is fabricated of one material and at least one of said cover members is fabricated of a second material different from said one material.
27. A disposable cover and bag assembly in accordance with Claim 26 wherein said bag is fabricated of polyvinylchloride.
28. A disposable cover and bag assembly in accordance with Claim 26 wherein said at least one of said cover members is fabricated of polyethylene.
- 22a -
- 22a -
29. A disposable cover and bag assembly in accordance with Claim 25 wherein said outer cover member includes a cylindrical section including an end surface and an inner surface including, adjacent said end surface, said serrated formation on said outer cover member.
30. A disposable cover and bag assembly in accordance with Claim 29 wherein said cylindrical section includes an end opposite said end surface, and an outer surface, and an annular supporting section extending from said outer surface of said cylindrical section in spaced relation from said end and including a cylindrical portion extending in generally parallel relation to said cylindrical section and toward said end and defining there between an annular space for receipt therein of a portion of the canister, said cylindrical portion including an outer end, and said supporting section including an annular foot at said outer end of said cylindrical portion and adapted to rest on a supporting surface.
31. A disposable cover and bag assembly in accordance with Claim 29 wherein said inner cover member includes a main body having an outer rim engaging said end surface of said cylindrical section of said outer cover member and a cylindrical section extending from said main body inwardly of said outer rim and having an outer surface with said serrated formation of said inner cover member.
32. A disposable cover and bag assembly in accordance with Claim 25 wherein said inner cover member includes a passage through which a suction can be drawn.
- 22b -
- 22b -
33. A disposable cover and bag assembly in accordance with Claim 25 wherein said inner cover member includes a passage through which a fluid can pass through said inner cover member.
34. A collection apparatus with a disposable portion comprising an outer canister having an open end, an outer cover member detachably connected to said open end and having a top including therein an opening, an inner cover member in said opening in said top of said outer cover member, and a bag extending in said outer canister and having a mouth gripped between said inner and outer cover members, said inner and outer cover members including inter-engaging means affording assembly of said inner and outer cover members and preventing disassembly of said inner and outer cover members, said inner-engaging means comprising a non-threaded serrated formation on each of said inner and outer cover members, each of said serrated formations including a plurality of parallel, endless projections defining grooves there between, said projections of each of said formations being received in said grooves of the other of said formations, and said bag being clamped between said formations.
35. A disposable cover and bag assembly comprising an outer cover member adapted to be connected to the open end of an outer canister and having a top including therein an opening, an inner cover member in said opening in said top of said outer cover member, a bag having a mouth gripped between said inner and outer cover members, and means on said inner and outer cover members for clamping said bag there between, said means including on one of said cover members a serrated formation for cammingly engaging the other of said cover members and for clamping said bag between said serrated formation and said other of said cover members.
-22c-
-22c-
36. A collection apparatus with a disposable portion comprising an outer canister having an open end, an outer cover member detachably connected to said open end and having a top including therein an opening, an inner cover member in said opening in said top of said outer cover member, a bag extending in said outer canister and having a mouth gripped between said inner and outer cover members, and means on said inner and outer cover members for clamping said bag there between, said means including on one of said cover members a serrated formation for cammingly engaging the other of said cover members and for clamping said bag between said serrated formation and said other of said cover members.
-22d-
-22d-
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US37270289A | 1989-06-26 | 1989-06-26 | |
| US372,702 | 1989-06-26 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1335247C true CA1335247C (en) | 1995-04-18 |
Family
ID=23469277
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA 613064 Expired - Fee Related CA1335247C (en) | 1989-06-26 | 1989-09-25 | Vacuum drainage collecting device |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA1335247C (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2465951B (en) * | 2007-10-04 | 2012-10-10 | Dornoch Medical Systems Inc | Medical waste fluid collection and disposal system |
-
1989
- 1989-09-25 CA CA 613064 patent/CA1335247C/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2465951B (en) * | 2007-10-04 | 2012-10-10 | Dornoch Medical Systems Inc | Medical waste fluid collection and disposal system |
| GB2491066A (en) * | 2007-10-04 | 2012-11-21 | Dornoch Medical Systems Inc | Disposable lid for canister |
| GB2491066B (en) * | 2007-10-04 | 2013-01-09 | Dornoch Medical Systems Inc | Medical waste fluid collection and disposal system |
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| Date | Code | Title | Description |
|---|---|---|---|
| MKLA | Lapsed |