EP0830904A2 - Andrucksvorrichtung für ein Lacksystem - Google Patents

Andrucksvorrichtung für ein Lacksystem Download PDF

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Publication number
EP0830904A2
EP0830904A2 EP97306838A EP97306838A EP0830904A2 EP 0830904 A2 EP0830904 A2 EP 0830904A2 EP 97306838 A EP97306838 A EP 97306838A EP 97306838 A EP97306838 A EP 97306838A EP 0830904 A2 EP0830904 A2 EP 0830904A2
Authority
EP
European Patent Office
Prior art keywords
bag
paint
region
bellows
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.)
Withdrawn
Application number
EP97306838A
Other languages
English (en)
French (fr)
Other versions
EP0830904A3 (de
Inventor
Nicholas Bowman
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Black and Decker Inc
Original Assignee
Black and Decker Inc
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Black and Decker Inc filed Critical Black and Decker Inc
Publication of EP0830904A2 publication Critical patent/EP0830904A2/de
Publication of EP0830904A3 publication Critical patent/EP0830904A3/de
Withdrawn legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B67—OPENING, CLOSING OR CLEANING BOTTLES, JARS OR SIMILAR CONTAINERS; LIQUID HANDLING
    • B67D—DISPENSING, DELIVERING OR TRANSFERRING LIQUIDS, NOT OTHERWISE PROVIDED FOR
    • B67D7/00—Apparatus or devices for transferring liquids from bulk storage containers or reservoirs into vehicles or into portable containers, e.g. for retail sale purposes
    • B67D7/02—Apparatus or devices for transferring liquids from bulk storage containers or reservoirs into vehicles or into portable containers, e.g. for retail sale purposes for transferring liquids other than fuel or lubricants
    • B67D7/0238—Apparatus or devices for transferring liquids from bulk storage containers or reservoirs into vehicles or into portable containers, e.g. for retail sale purposes for transferring liquids other than fuel or lubricants utilising compressed air or other gas acting directly or indirectly on liquids in storage containers
    • B67D7/0255—Apparatus or devices for transferring liquids from bulk storage containers or reservoirs into vehicles or into portable containers, e.g. for retail sale purposes for transferring liquids other than fuel or lubricants utilising compressed air or other gas acting directly or indirectly on liquids in storage containers squeezing collapsible or flexible storage containers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C17/00—Hand tools or apparatus using hand held tools, for applying liquids or other fluent materials to, for spreading applied liquids or other fluent materials on, or for partially removing applied liquids or other fluent materials from, surfaces
    • B05C17/02—Rollers ; Hand tools comprising coating rollers or coating endless belts
    • B05C17/03—Rollers ; Hand tools comprising coating rollers or coating endless belts with feed system for supplying material from an external source or with a reservoir or container for liquid or other fluent material located in or on the hand tool outside the coating roller
    • B05C17/0316—Rollers ; Hand tools comprising coating rollers or coating endless belts with feed system for supplying material from an external source or with a reservoir or container for liquid or other fluent material located in or on the hand tool outside the coating roller with pressurised or compressible container
    • 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
    • B65D75/00—Packages comprising articles or materials partially or wholly enclosed in strips, sheets, blanks, tubes or webs of flexible sheet material, e.g. in folded wrappers
    • B65D75/008—Standing pouches, i.e. "Standbeutel"
    • 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
    • B65D2231/00—Means for facilitating the complete expelling of the contents
    • B65D2231/001—Means for facilitating the complete expelling of the contents the container being a bag
    • B65D2231/004—Means for facilitating the complete expelling of the contents the container being a bag comprising rods or tubes provided with radial openings, ribs or the like, e.g. dip-tubes, spiral rods

Definitions

  • This invention relates to a paint system of the type broadly disclosed in GB 2142386.
  • paint may be supplied to customers in flexible paint reservoirs, or bags.
  • a machine is supplied which contains a bellows, or other pressurising means, arranged to squeeze the bag of paint and force the paint to exit the bag through a tube to a paint dispensing element, such as a brush or roller.
  • the present invention is particularly concerned with a a paint system having a pressure device, in the form of bellows.
  • any paint system it is desirable that the paint rolls well and does not spatter, and this is largely a function of the paint.
  • the best compositions in this regard have a high viscosity when compared with water, for example, but this has the disadvantage that flow of paint along the tube is restricted.
  • the diameter of the tube should be large, or the pressure developed by the machine must be large.
  • the former requirement has the disadvantage that, with a large diameter tube, a large volume of paint remains unusable in the tube when the paint bag is empty and pressure in the system drops.
  • the latter requirement is therefore preferred, and this calls for strength in the design of the machine.
  • a paint system comprising:-
  • the bellows slides over the bag as it inflates and does not impose such localised pressure forces on the bag. More especially, it does not grip the bag against opposite side walls of the container, so that chords of the side walls of the bag across the container are not experienced. Such chords prevent reduction of bag volume on further pressurisation of the bellows.
  • the bag comprises an envelope of two substantially rectangular sides welded along their edges, the opening being formed in a top corner thereof and a gusset being formed along a bottom thereof, whereby, when filled with paint, the bag has a substantially circular cylindrical form with a gusset region forming a rectangular chamfered base of the bag and with a flattened, tapering top region, and wherein the container has itself a rectangular chamfered base on which said gusset region is adapted to lie.
  • the container has an open top forming a substantially circular cylindrical opening and having a flattened side against which said bellows are positioned, an internal wedge being formed in said container around said top opposite said flattened side and adapted to support said top region of the bag.
  • the tube includes a connector for said connection to the opening of the bag, wherein the connector is adapted to be captured in a recess formed in the top of the container.
  • capturing holds the bag in the correct position in the container, particularly when it is not full, so that complete emptying of the bag on pressurisation of the bellows can be ensured.
  • the bellows comprises an envelope having two sides, and two gussets between the sides along opposite edges of the sides.
  • the gussets are preferably interconnected inside the bellows by elastic elements serving to pull the gussets together to assist deflation of the bellows.
  • the sides of the bellows are constructed from a laminate of elastomeric sheet to which is fixed woven fabric sheet.
  • the woven fabric is cotton.
  • the material of the bellows is flexible, but not elastic.
  • paint is used exclusively herein, it should be understood to include any liquid, and, indeed, while the invention is described exclusively in relation to the application of paint, which in this context includes other surface coating compositions such as varnishes, stains and lacquers, the concepts embodied in the present invention may be employed in the dispensing of liquids completely unrelated to surface coating compositions.
  • a paint application machine 10 which comprises a hollow container 12, a back cover 18 and a closing handle 16.
  • the container includes a bellows (22, Figure 4) pressurised with fluid by a pump unit (28, also Figure 4).
  • the back cover 18 is shown in Figure 1, but is removed from Figure 2.
  • the handle 16 is in its open position, when a lid 14 is openable.
  • container 12 has an internal space 20, a back side wall 13, and a base 15.
  • Back cover 18 defines with the container 12 two spaces, one on each side of the machine and only one of which, 90 is visible in the drawings.
  • this space 90 is disposed the pump unit 28.
  • In the other space is disposed a battery to power the pump unit.
  • a tube 26 exits the pump unit and is connected to connector 198 at the bottom of bellows 22.
  • Bellows 22 comprises two sheets or panels 190,192 of cotton covered, elastomeric material, connected by like material top and bottom gussets 194,196 respectively.
  • Lid 14 is pivoted about axis 32 to container 12 and a flap 27 of the bellows is connected to the lid.
  • Connector 50 extends from container 12 through a recess 34 in top edge 9.
  • a second flap 25 of the bellows is connected to back wall 13 of the container 12.
  • the pump unit 28 is operated by a button 30 and is powered by the battery (not shown).
  • the paint bag 24, when filled with paint, is placed in the container 12 where it nestles close to the bellows 22, and fits snugly inside the volume 20.
  • the pump unit 28 pressurises bellows 22 which expand and compress the paint bag 24. Paint in the bag is then squeezed out through an opening 40 of the bag, through a connector 50 on the end of a tube 60, along the tube and thence to a handle 70 and an applicator 80.
  • a control knob 72 on handle 70 is used to control flow of paint to roller arrangement 80 so that sufficient paint is supplied to maintain the requisite wetness of the roller as it is rolled over a wall or other surface to which paint is to be applied.
  • the container top edge and lid have respective recesses 34,36 adapted to receive and capture the connector 50 when correctly oriented as explained further below.
  • handle 16 can be pivoted to the position shown in Figure 1 where it prevents the lid from opening.
  • container 12 has substantial latticing on its flat surfaces, that is to say along its back surface 13 and bottom 15, in order to provide reinforcement of those surfaces. Curved surfaces of the container do not require such reinforcement.
  • the lid 12 is likewise latticed. With this arrangement pressures of the order of 1.5 bar above atmospheric can be accommodated, although only about 1 bar above atmospheric is found to be necessary to provide the requisite flow rate.
  • the present invention provides an arrangement where the strength of the bag is not entirely limiting on the pressure appliable.
  • FIG. 5 shows a paint bag 24, which comprises a plastics envelope welded around its periphery 110.
  • a carrying handle 120 is formed in one corner, and in the other is the opening 40.
  • the opening 40 comprises a discrete opening element 41 captured by the bag envelope and welded to it.
  • Element 41 comprises a weld part, or base, 122 having tapering lead-in, lead-out regions 124,126 enabling reliable welding to the bag envelope.
  • Behind the weld part is connected a dip element 128 which serves to keep the walls of the envelope apart and ensure a passage for paint in the bag from the bottom of the bag to the opening.
  • a passage 130 is formed through the weld part and into a neck 132 of the element 41.
  • the dip element 128 is essentially cruciform in section and connects with the weld part at four points 134 providing access to the bag interior from the passage 130.
  • FIG. 6 shows the bag construction in more detail.
  • a bottom gusset 114 which is rectangular in shape.
  • the gusset is folded in half along its length along fold line 114a and its ends 114b are welded together and between sides 112a,b at 114b.
  • the sides 112a,b are each separately welded to the gusset 114 along two base edges 110c and two triangulating fillets 116a,b at each end of the gusset 114.
  • the essential shape of the bag when it is full is circular cylindrical, with gusset region having a squared base from which four chamfers lead to the cylindrical part, and a flattened, tapering top region extending from the cylindrical part.
  • Figures 7 and 8 show the bellows 22, which is a double envelope comprising front and back sheets 190,192 of flexible, gas impermeable material, preferably an elastomer sheet having a woven cotton layer attached to aid slippage against the plastics material of the bag 24.
  • Upper and lower gussets 194,196 are provided between the sheets 190,192, each folded in half along respective lines 194a,196a when the bellows is deflated and flat.
  • the bellows is substantially octagonal in profile which corresponds to the side profile of the bag 24.
  • gusset 196 Between lower gusset 196 and back sheet 192, an opening 198 is formed for connection of air tube 26. Flap 27 is an extension of front sheet 190, while flap 25 is an extension of gusset 194.
  • the gussets 194,196 are connected internally of the bellows by elastic elements 200. These serve to assist deflation of the bellows when air pressure is released. This occurs when button 30 is disengaged both switching off pump unit 28 and opening a dump valve (not shown) provided in a pressure chamber of the pump unit. The elastic elements pull the gussets towards their fold lines 194a,196a.
  • opening of the lid 14 further assists deflation, because flap 27 is bent back, as can be seen in Figure 4, and, since the bottom of the bellows is connected, by means not shown, to the bottom of the back wall 13 around the opening 198, the bellows is further urged into its collapsed condition.
  • neck 132 of the opening element 41 of the bag 24 has, from its connection to the weld part 122, a flange 136, a screw threaded region 138, a bayonet region 140, and a mouth 142 for the passage 130.
  • Flange 136 has four equi-spaced detents, or notches, 144.
  • a cap 145 is internally screw threaded for engagement with screw thread 138 on the neck 132 of the opening.
  • Bayonet 140 of the neck 132 comprises merely a quarter to one third turn screw thread 141, one on either side of the neck.
  • Connector 50 comprises two discrete elements, a main connector body 150 and a connection element 152.
  • Connector body 150 has a connection region 154, a flexible region 156, a support region 158 and a protection region 160.
  • the tube 60 passes through the connector body and is press fitted over one end 162 of connection element 152.
  • a circumferential rib 164 aids sealing and also ensures a tight fit when the connector body 150, is slid over the tube and snapped into engagement with the element 152, barbs 166 on the element snapping into windows 168 in the body 150.
  • a sleeve 170 of the body closely surrounds the end 162 of the element 152 and presses the tube into engagement with the rib 164 securing the connection of the tube to the element 152.
  • the flexible region 156 Behind the connection region of the connector 150 is the flexible region 156.
  • the reason for this region is explained further below, but it comprises an helical formation 172 which gives the region flexibility but at the same time a certain amount of rotational rigidity about the long axis of the connector, at least in the direction of tightening of the helix 172.
  • the flexible region provides flexibility, nevertheless it still has radial rigidity and prevents the tube 60 from being compressed by the bellows as it inflates. If such compression were to occur, the tube might be closed preventing exit of the paint along the tube.
  • the support region 158 which, in Figures 10b and 10c is shown in two alternative forms, cross sections of each form being shown in Figures 12a and 12b respectively.
  • the Figure 10b embodiment is preferred and, apart from comprising a rigid sleeve 174 which both embodiments employ, it has two depending pillars 176 either of which is adapted to be received in an eye 35 formed in the base of recess 34 of the container 12.
  • the support region is given a rectangular section adapted to be received in the recess 34, which recess would be correspondingly shaped and so as to ensure only two possible orientations of the connector in the recess.
  • the protection region 160 extends from the support region 174 and may, like the flexible region comprise a helix, or as shown may comprise a lattice type arrangement. In either case, it is provided merely to ensure that the tube exiting the support region cannot kink through a small angle but is supported over a larger radius of bend by the protection region 160.
  • the flexible region 156 may also be arranged as a lattice formation, but a helix is preferred for both given its greater flexibility.
  • connection element 152 has a smooth external circular cross-section 153 over a similar length from its own mouth 178. Near its mouth, the connection element 152 has a circumferential groove in which is disposed an elastomeric O-ring 155, adapted to provide a seal against passage 130 when the connector 150 is engaged with bag opening 40.
  • connection element 152 the connector body 150 in its connection region 154 has a pair of bayonet dogs 180 (see also Figure 11). These are adapted to be engaged in entries 143 of bayonet screw thread 141 of neck 132. When dogs 180 are engaged with thread 141 and the connector is turned through about 90 degrees, two lugs 182 engage flange 136 on neck 132 of the bag opening 40. When the connector is turned fully, the lugs snap into detent notches 144 in the flange 136.
  • FIG 9 this illustrates the process of bag 24 emptying of paint during use as the bellows 22 expand.
  • the lid 14 is shown open for the sake of clarity, although, in fact, arrangements not fully discussed herein prevent operation of the machine 10 while the lid is open.
  • the flap 27 of the bellows appears to grow in Figures 9a, b and c, but of course this is not, in reality, the case, although the flap does move during bellows inflation under its connection to the lid when the lid is closed.
  • the bellows 22 begins to inflate and squeeze the bag 24 in the container 12 so that paint therein exits through bag opening 40, through connector 50 into tube 60, and thence to handle 70 and paint applicator 80 for application to a surface such as a wall.
  • the centre line of the bag moves away from back wall 13, so that flexible region 156 of the connector 50 flexes beyond an in-line position as shown in Figure 9b and to a fully bent-back position as shown in Figure 9c when the bag is substantially empty and the connector is pressed against the front wall of the container.
  • the bellows adapts itself to the shape of the bag and slides over it as the bag changes shape on gradual opening. This is crucial in ensuring that, as the bag 24 empties, its edges 24a (see Figure 9c) do not trap the bag against the side wall of the container and form a chord (dashed line 24b) across the container which would isolate the region of the bag 24 between the chord and wall so that, no matter what pressure the bellows developed, the volume enclosed would be relieved of pressure and paint contained therein could not be expelled. In any event, if such a chord did develop, the tension in it could be sufficient to tear the bag because of the pressure capable of being developed by the bellows.
  • a base insert 300 (see Figure 14) is received on the bottom wall 15 of container 12, which insert has front flange 302 and side flanges 304. Together with bottom front face 306 of the bellows 22 (see Figure 4), these flanges 302,304 support the chamfered regions 308 (see Figure 6) of the bottom of bag 24. Moreover, referring to Figure 13, a curved wedge element 310 is fixed around the top edge 9 of the container 12 to support the flattened top region of the bag 24.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Containers And Packaging Bodies Having A Special Means To Remove Contents (AREA)
  • Coating Apparatus (AREA)
EP97306838A 1996-09-07 1997-09-02 Andrucksvorrichtung für ein Lacksystem Withdrawn EP0830904A3 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB9618712A GB2309265B (en) 1996-09-07 1996-09-07 Paint system pressure device
GB9618712 1996-09-07

Publications (2)

Publication Number Publication Date
EP0830904A2 true EP0830904A2 (de) 1998-03-25
EP0830904A3 EP0830904A3 (de) 1998-10-21

Family

ID=10799585

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97306838A Withdrawn EP0830904A3 (de) 1996-09-07 1997-09-02 Andrucksvorrichtung für ein Lacksystem

Country Status (2)

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EP (1) EP0830904A3 (de)
GB (1) GB2309265B (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2021058889A1 (fr) * 2019-09-24 2021-04-01 Axel France Sac-a-dos distributeur de liquide ameliore

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111882828B (zh) * 2020-07-22 2021-08-20 淮北智淮科技有限公司 一种防滑坡预警装置及其使用方法

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2142386A (en) 1983-06-27 1985-01-16 Kr Ass Inc Force driven fluid coating applicator for paint and the like

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3933415A (en) * 1973-05-11 1976-01-20 Woolpert John C Painting system
GB2100357A (en) * 1981-06-17 1982-12-22 Gen Foods Ltd Dispenser for a liquid
GB2159583A (en) * 1984-05-30 1985-12-04 Kelvin Dawes Liquid dispensing apparatus
GB8516118D0 (en) * 1985-06-26 1985-07-31 Btr Plc Packing of liquids
KR930001695B1 (ko) * 1987-01-30 1993-03-11 기린 비루 가부시키가이샤 백인복스(bag in box) 및 백인복스용 포대
US5048724A (en) * 1988-11-22 1991-09-17 Fedpak Systems, Inc. Soft serve frozen confection dispenser
US5935659A (en) * 1996-01-11 1999-08-10 Imperial Chemical Industries Plc Process and apparatus for the roller-application of an aqueous thixotropic coating composition

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2142386A (en) 1983-06-27 1985-01-16 Kr Ass Inc Force driven fluid coating applicator for paint and the like

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2021058889A1 (fr) * 2019-09-24 2021-04-01 Axel France Sac-a-dos distributeur de liquide ameliore

Also Published As

Publication number Publication date
EP0830904A3 (de) 1998-10-21
GB2309265B (en) 1997-12-17
GB9618712D0 (en) 1996-10-16
GB2309265A (en) 1997-07-23

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