CA2094919A1 - Pneumatically controlled mechanized applicator for drywall mastic and tape - Google Patents
Pneumatically controlled mechanized applicator for drywall mastic and tapeInfo
- Publication number
- CA2094919A1 CA2094919A1 CA002094919A CA2094919A CA2094919A1 CA 2094919 A1 CA2094919 A1 CA 2094919A1 CA 002094919 A CA002094919 A CA 002094919A CA 2094919 A CA2094919 A CA 2094919A CA 2094919 A1 CA2094919 A1 CA 2094919A1
- Authority
- CA
- Canada
- Prior art keywords
- tape
- mastic
- applicator
- wand
- controlling
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B44—DECORATIVE ARTS
- B44C—PRODUCING DECORATIVE EFFECTS; MOSAICS; TARSIA WORK; PAPERHANGING
- B44C3/00—Processes, not specifically provided for elsewhere, for producing ornamental structures
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04F—FINISHING WORK ON BUILDINGS, e.g. STAIRS, FLOORS
- E04F21/00—Implements for finishing work on buildings
- E04F21/165—Implements for finishing work on buildings for finishing joints, e.g. implements for raking or filling joints, jointers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B44—DECORATIVE ARTS
- B44C—PRODUCING DECORATIVE EFFECTS; MOSAICS; TARSIA WORK; PAPERHANGING
- B44C7/00—Paperhanging
- B44C7/02—Machines, apparatus, tools or accessories therefor
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04F—FINISHING WORK ON BUILDINGS, e.g. STAIRS, FLOORS
- E04F21/00—Implements for finishing work on buildings
- E04F21/02—Implements for finishing work on buildings for applying plasticised masses to surfaces, e.g. plastering walls
- E04F21/026—Implements for finishing work on buildings for applying plasticised masses to surfaces, e.g. plastering walls for applying adhesive or joint compound to joint tapes, in particular drywall tapes
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04F—FINISHING WORK ON BUILDINGS, e.g. STAIRS, FLOORS
- E04F21/00—Implements for finishing work on buildings
- E04F21/02—Implements for finishing work on buildings for applying plasticised masses to surfaces, e.g. plastering walls
- E04F21/06—Implements for applying plaster, insulating material, or the like
- E04F21/08—Mechanical implements
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04F—FINISHING WORK ON BUILDINGS, e.g. STAIRS, FLOORS
- E04F21/00—Implements for finishing work on buildings
- E04F21/165—Implements for finishing work on buildings for finishing joints, e.g. implements for raking or filling joints, jointers
- E04F21/1655—Implements for finishing work on buildings for finishing joints, e.g. implements for raking or filling joints, jointers for finishing corner joints
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04F—FINISHING WORK ON BUILDINGS, e.g. STAIRS, FLOORS
- E04F21/00—Implements for finishing work on buildings
- E04F21/165—Implements for finishing work on buildings for finishing joints, e.g. implements for raking or filling joints, jointers
- E04F21/1657—Implements for finishing work on buildings for finishing joints, e.g. implements for raking or filling joints, jointers for applying tape to joints, e.g. drywall taper tools
Landscapes
- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Coating Apparatus (AREA)
Abstract
ABSTRACT OF THE INVENTION
An automatic, powerized system delivers mastic and tape to a drywall during an installation thereof. In a delivery head on the end of a wand, a plurality of pneumatic cylinders control the delivery of mastic and tape responsive to finger tip controls on the wand. The entire system may be cleaned out by substituting a source of running water for a source of mastic.
An automatic, powerized system delivers mastic and tape to a drywall during an installation thereof. In a delivery head on the end of a wand, a plurality of pneumatic cylinders control the delivery of mastic and tape responsive to finger tip controls on the wand. The entire system may be cleaned out by substituting a source of running water for a source of mastic.
Description
2~9~9 P~UNATICA~Y CO~ROL~ED ~BC~N~D
APP~ICA~O~ FOR
D~W~L~ IC AND ~A~X
This inventio~ relates to tools ~or use during the installation or repair of wallboard or drywall and more particularly ~o pneuma~ica~ly controlled, large volume, mechanized applicators for filling recesses in the wallboard or drywall with a mastic and for applying tape during khe application of the mastic.
The inventive tool is related to tools such as khat shown and described in U.S. Pa~ent ~,105,490.
During the erection and installation of wallboard or drywall, there are many reasons why joints, holes, and other irregularities appear on the sur~ace o~ a wallboard panel. For example, these panel~ are usually four feet wide, are installed in an ~d~e to edge abutment, and held in place by nail6 or ~crews, which are set into the wallboard ~o that the nail or screw heads will not show on the fini~hed wall. Thi~ form of installation leaves cracks, small holes, and sometimes, nicks or gouges. Regardless of how they got there, all such surface discontinuities must be filled with a suitable mastic (sometimes called "mud"3 to give a smooth plaster-like surface. I~ there are cracks or if : the discontinuities are large enough, tape must be embedded in the mastic to give a greater degree of mechanical strength.
a5 Pinishing drywall or wallboard 5urface~ under these conditions i5 basically a multi-~tep proce~, with a drying phase between each step. A bedding coat of joint , . . . .
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:
, 2 a ~ s compound or other mastic ~ill5 a crack or recess formed in the wallboard which may or may not b~ reinforced with a tape, depending upon the needs and the size o~ the crack or recess. After the mastic or compound is 5 applied and while i~ is stil 1 #et, excess compound should be wiped down. Compound or Dlastit:: shrirlks as i~:
dries, which resul~s in slight depressions that are filled by applying one or more topping or ~inishing coats of the mastic or compound.
lo Regardless of how the tools for applying the mastic are used, it is necessary to load, unload, and clean them. A conventional hand tool has a box-like open area into which the mastic or compound i~ first loaded and then squeezed out a~d onto the wall. The tool ~ust be filled and cleaned often. Some of the mastic dries relatively fast ~Q that, if it is not cleaned promptly, small hard bits will collect in and on the tool to prevent a smoo~h uniformity in the deposited material.
Sometimes the drying mastic material may interfere with, obstruct, or perhaps even immobilize tool partsO Thus, it becomes necessary and desirabl~ to reduce the time reguired to clean the tool and to eli~inat~ nooksO
crannies, and other configurations within the tool which may tend to collect debris that cannot be adeguately cleaned.
.
' ' 2 ~ 1 9 Another problem is that it has heretofore been necessary to cut tape to size, and fit it i~to the - crack, as it is embedded in the mastic.
Accordingly, there is a need for a large volu~e tool whi~h does not have to be clea~ed and refilled as often as was heretofore re~uired. There i5 also a need for dispensing tape along with the mastic.
Accordingly, an object of the invention is to provide new and improved tools for applying both tape and mastic and other compositions to wallhoards or drywalls. In particularly, an object is to provide a large volume tool for applying mastic which eliminates much of the need for rep~atedly cleaning the mastic from the tool. Here, an object is to provide a user ~riendly tool which rPquires no special training and whi~h requires little maintenance and no user maintenance.
Still another object is to pro~ide a tool for applying and cutt~ng of~ the tape, as it is required.
Yet another object is to provide a power assisted tool for simultaneously applying tape and mastic.
A further object of the invention is to provide a tool which is easy to guide or teer as it is ~oved over the wall, w1th lower opera~or ~atigue.
In keeping with an aspect of th~ invention,:these and other obj~cts are accompli~hed by a tool which has a large reservoir ~ontaining a mastic or composition which is fed through a hand held wand to the point of application on the drywall. Tape i~ also fed via the wand to the wall where it is embedded in the mastic as :
~' . ' :, , :
. . . I ~ .
:
2~919 it is applied. ~11 of these functions are controlled from finger tip controls which operate pneumatic cylinders tha~ con~rol khe various func~ions.
A preferred embodimen~ o the invention i5 ~hown in the attached drawings, wherein:
Fig. 1 illustrates the inventive tool;
Fig. lA is an exploded view of a control head also shown in Fig. l;
Fig. 2 is an exploded view of the mastic applicator and tape applying head;
Fig. 3 is a cross-section of a ~ide elevation of the inventive tool showing how the parts of Fiy. 2 are interconnected.
The inventive machine (Fig. 1) includes a wheeled cart 20 having mounted thereon an electric air compressor, a hopper or reservoir 24 ~or ~astic, and a reel 26 for receiving and paying out a hose. A wand 32 is connected between the mastic or mud hose 28lair line 30 combination and a maatic and tape apply1ng head 420 The conduit ~8 upplies the mastic and air line 30 supplies pressurized air for powering air cylinder~ in the head. Suitable finger tip controls are pr wided at control head 34. These Gontrols (Fig. 1~) may be any suitable deYices~ such as plastic covered push buttDns PBl,~PB2, for example. Push button PBl operates a tape , cutter in head 42. Push button PB2 controls the ~low o~
mastic~to the head 42. The collar 35 attaches to control head 34 in order to provide mechanical :protection ~or the push buttons.
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A roll or magazine of tape 36 is mounted on the wand at a suitable location which places the center of gravity in an easy to manipulate position. The tap 38 is fed through head 42 responsive to ~n operation of a ~uitable control lever 40.
At the top of the wand, head 42 includes a body 44 for advancing and delivering both the tape and the mastic to the wall. A tape advance mechanism includes a wheel 48 which rolls along the wall to support the tool, and a creaser 50 for pressing the tape into a desired position. A cutter block ~2 cuts of~ the tap~ after it has been applied.
An exploded view of th~ taping and mastic delivery head 42 is shown in Fig~ 2. An assembled view of the same head is seen in Fig. 3.
The various parts are supported in a housing formed from a cover plate 60 and two side plates 62, 64 which are joined by being bolted to two sets of cover supports bars 66, 68. These cover and side plates have a number of holes or openings ~ormed therein to receive bolts, screws, ri~et~, etc. most of which axe not ~hown, in order to avoid a cluttered dx~wing. A transition mount 70 is fastened to the rear edges o~ the cover and side plates 60-64 in order to provide a tran ition betw~en the reotangular cross-section of the hou~ing ~nd the circular cross-section o~ the wand 3~. A bracket 72 spreads and secures the lower opposed corners of side plates 62, 64 while securing the bottom of tran~ition mount 70.
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9 ~ ~ ~
The nozzle 74 for dispensing the mastic has a nozzleoutlet or control valve 76 and a mastic inlet 7R~ Valve 76 sets in outlet 79.
The flow of the mastic is responsive to valve 76, which in turn is controlled by components enclosed by a cover plate 110 attached to the outside of side plate 62. The components selectively rotate the nozzle inlet valve 76 responsive to the operator~ finger tip control, thus making it act as a stop-cock valve. The control structure comprises a valve actuator 1 ver 112 . mounted on a bearing 1~4 integrally formed on a shoulder screw 116. A driving gear 118 and a driven gear 120 are turned as the lever arm 112 rotates under an urging of an air or pneumatic cylinder 122 which is coupled to arm 112 via shaft 124, which is attached to an outar end of arm 112 by a bolt 126. The sha~t ~24 passes through an arcuate slot 128 in the side plate. 62 so that it is free to move with and as air cylinder 122 extends or retracts.
Thus, responsive to a ~inger tip control 34 (Fig.
1), as air cylinder 122 extends it~ a~m, chaft 124 moves arm 112 in one direction to rotate wheel ~18 in one direction. This turns g~ar 120 and the mastic ~low :
control stop-cock valve 76 to one position. When air : cylinder 122 retract~ its arm, the process i~ opposite ~` in order to rotate the valve 76 to an opposite position.
This opens and closes the mastic Plow control valve 76 depending upon the position of the air cylinder arm.
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.~ ~
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, % ~ 9 Two 0-rings 130 seal the openinys 131 at the ends of valve 76 to prevent an escape o~ the mastic ~rom the nozzle 74 into the interior of head 42.
The tape control and advance mechanism begins with two rubber pinch rollers 132, 134 ~o~nt d on hub units 136, 138, respectively. Hub 136 is mounted on shaf~ 140 while hub 13~ is mounted on shaPt 142. ~hese ~hafts and hubs are rotatably supported by suitable bearings and related equipmentO rhe tape pas~es between pinch rollers 13~, 134 and through tape guides 148, 150 which have two confronting guide slots 152, 154 for the tape to pass through. The tape issuing from slots 152, 154 passes through a slot 156 in an inlet block of metal.
A guillo~ine cu~ter blade 160 is mounted on a cutter blade holder 162 having a pair of upstanding ears 16~, 166 which are coupled to a cutter actuator arm 168 by a pin 170. The actuator arm 168 is controlled by a pneumatic or air cylinder 175 which is ~ecured in place by a pair of brackets 172, 174.
An anvil 176 is positioned to ~h~ar the tape when the guillotine cutter blade 160 moYes up and then down.
A ~ea~ spring 178 keeps the pressure upon the a~vil ~which insures the shearing action by a movement o~ the : .
blade 160. Normally, the air cylinder 175 holds th2 cutter blade 160 in an ~levated position~ When a ~inger tip push button is pressed at 34 (Fig. 1), the air or pneumatic cylinder 175 move6 ~ctuator arm 168 which, in turn, lowers blade 160 and cu~s the tape. Therea~ter cylinder 175 returns the blade to its starting position.
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The cutter assembly is completed by a cover 171 and b~se 173. Plate 175 i a tape guide. Two rollers 177, 179 assist in guiding the tape.
The con~rol an advance of the tap 38 (Fig. 1), a S rack and pinion 1~4 (Fig. ~) is actu~ted by an air or pneumatic cylinder 186 re ponsive to control lever 40 (Fig. 1). Two huhs 188, 190 ar2 8upported on a tape wheel shaf~ 192 which also receives a ~reaser arm 194 carrying a creaser wheel 196 that i8 especially useful when tape is applied to an inside corner of the drywall.
The movement of creaser arm 94 is controlled by a ~reaser cable lg8 and return spring 200. As the cr~aser arm and wheel press the center o~ the tape while it is being applied to the wall, spring 173 provides enough give to apply a predetermined amount of pressure to the tape. Outside of the hubs 188, 190 are two tape wheels 202, 204 which press the edges o~ the tape into place.
Two tape wheel hub ass~mblies 206, 208 hold the wheels in place on shaft 192.
20 ~ The operation of the tool should now be apparent.
The compressor 22 (Fig. 1) is started and pressurized mastic is foroed through hose 28 and wand 32. At the push of a finger tip push button at 34~, air cylinder 122 operates to rotate ma tic flow control valve 76, and ~thereby enable mastic to ~low out of outlet 79 and on the wall. The tape i5 deposit~d on the drywall and is embedded in the ~astir as rack and pinion 184 re6pond to air cylinder 186. As air cylinder 186 operates rack and , . . . .
:
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.:
2 ~ 9 g pinion 184, the pinch roller wheels 132, 134 rotate and deliver the tape from their nip toward the wall.
The worker move~ wand 32 to distribute the mastic and tape ~ver th~ wall in order to fill a crack, ~or exam~le. When the worker reaches an.end of a crack, he pushes a suitable push ~u~sn (not ~hown) at 34 (Fig. 1). Air cylinder 122 rotates valve 76 to cut o~f the flow ~ mastic. ~t the same time, air cylinder 175 moves the guillotine cutter blade 160 to ~hear the tape.
This ~ool provides many advantages over other ~ools which have been known in the past.
1. There are longer operating times betwee~
loadings. The tool system holds up to ten gallon of joint compound in its hopper/pump combination cart.
2. Th2re is lower operator fatigue. The taper is lighter in weight. Its controls are finger-operated air valves requiring little effort.
APP~ICA~O~ FOR
D~W~L~ IC AND ~A~X
This inventio~ relates to tools ~or use during the installation or repair of wallboard or drywall and more particularly ~o pneuma~ica~ly controlled, large volume, mechanized applicators for filling recesses in the wallboard or drywall with a mastic and for applying tape during khe application of the mastic.
The inventive tool is related to tools such as khat shown and described in U.S. Pa~ent ~,105,490.
During the erection and installation of wallboard or drywall, there are many reasons why joints, holes, and other irregularities appear on the sur~ace o~ a wallboard panel. For example, these panel~ are usually four feet wide, are installed in an ~d~e to edge abutment, and held in place by nail6 or ~crews, which are set into the wallboard ~o that the nail or screw heads will not show on the fini~hed wall. Thi~ form of installation leaves cracks, small holes, and sometimes, nicks or gouges. Regardless of how they got there, all such surface discontinuities must be filled with a suitable mastic (sometimes called "mud"3 to give a smooth plaster-like surface. I~ there are cracks or if : the discontinuities are large enough, tape must be embedded in the mastic to give a greater degree of mechanical strength.
a5 Pinishing drywall or wallboard 5urface~ under these conditions i5 basically a multi-~tep proce~, with a drying phase between each step. A bedding coat of joint , . . . .
- .. .
.
.
:
, 2 a ~ s compound or other mastic ~ill5 a crack or recess formed in the wallboard which may or may not b~ reinforced with a tape, depending upon the needs and the size o~ the crack or recess. After the mastic or compound is 5 applied and while i~ is stil 1 #et, excess compound should be wiped down. Compound or Dlastit:: shrirlks as i~:
dries, which resul~s in slight depressions that are filled by applying one or more topping or ~inishing coats of the mastic or compound.
lo Regardless of how the tools for applying the mastic are used, it is necessary to load, unload, and clean them. A conventional hand tool has a box-like open area into which the mastic or compound i~ first loaded and then squeezed out a~d onto the wall. The tool ~ust be filled and cleaned often. Some of the mastic dries relatively fast ~Q that, if it is not cleaned promptly, small hard bits will collect in and on the tool to prevent a smoo~h uniformity in the deposited material.
Sometimes the drying mastic material may interfere with, obstruct, or perhaps even immobilize tool partsO Thus, it becomes necessary and desirabl~ to reduce the time reguired to clean the tool and to eli~inat~ nooksO
crannies, and other configurations within the tool which may tend to collect debris that cannot be adeguately cleaned.
.
' ' 2 ~ 1 9 Another problem is that it has heretofore been necessary to cut tape to size, and fit it i~to the - crack, as it is embedded in the mastic.
Accordingly, there is a need for a large volu~e tool whi~h does not have to be clea~ed and refilled as often as was heretofore re~uired. There i5 also a need for dispensing tape along with the mastic.
Accordingly, an object of the invention is to provide new and improved tools for applying both tape and mastic and other compositions to wallhoards or drywalls. In particularly, an object is to provide a large volume tool for applying mastic which eliminates much of the need for rep~atedly cleaning the mastic from the tool. Here, an object is to provide a user ~riendly tool which rPquires no special training and whi~h requires little maintenance and no user maintenance.
Still another object is to pro~ide a tool for applying and cutt~ng of~ the tape, as it is required.
Yet another object is to provide a power assisted tool for simultaneously applying tape and mastic.
A further object of the invention is to provide a tool which is easy to guide or teer as it is ~oved over the wall, w1th lower opera~or ~atigue.
In keeping with an aspect of th~ invention,:these and other obj~cts are accompli~hed by a tool which has a large reservoir ~ontaining a mastic or composition which is fed through a hand held wand to the point of application on the drywall. Tape i~ also fed via the wand to the wall where it is embedded in the mastic as :
~' . ' :, , :
. . . I ~ .
:
2~919 it is applied. ~11 of these functions are controlled from finger tip controls which operate pneumatic cylinders tha~ con~rol khe various func~ions.
A preferred embodimen~ o the invention i5 ~hown in the attached drawings, wherein:
Fig. 1 illustrates the inventive tool;
Fig. lA is an exploded view of a control head also shown in Fig. l;
Fig. 2 is an exploded view of the mastic applicator and tape applying head;
Fig. 3 is a cross-section of a ~ide elevation of the inventive tool showing how the parts of Fiy. 2 are interconnected.
The inventive machine (Fig. 1) includes a wheeled cart 20 having mounted thereon an electric air compressor, a hopper or reservoir 24 ~or ~astic, and a reel 26 for receiving and paying out a hose. A wand 32 is connected between the mastic or mud hose 28lair line 30 combination and a maatic and tape apply1ng head 420 The conduit ~8 upplies the mastic and air line 30 supplies pressurized air for powering air cylinder~ in the head. Suitable finger tip controls are pr wided at control head 34. These Gontrols (Fig. 1~) may be any suitable deYices~ such as plastic covered push buttDns PBl,~PB2, for example. Push button PBl operates a tape , cutter in head 42. Push button PB2 controls the ~low o~
mastic~to the head 42. The collar 35 attaches to control head 34 in order to provide mechanical :protection ~or the push buttons.
:, :
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A roll or magazine of tape 36 is mounted on the wand at a suitable location which places the center of gravity in an easy to manipulate position. The tap 38 is fed through head 42 responsive to ~n operation of a ~uitable control lever 40.
At the top of the wand, head 42 includes a body 44 for advancing and delivering both the tape and the mastic to the wall. A tape advance mechanism includes a wheel 48 which rolls along the wall to support the tool, and a creaser 50 for pressing the tape into a desired position. A cutter block ~2 cuts of~ the tap~ after it has been applied.
An exploded view of th~ taping and mastic delivery head 42 is shown in Fig~ 2. An assembled view of the same head is seen in Fig. 3.
The various parts are supported in a housing formed from a cover plate 60 and two side plates 62, 64 which are joined by being bolted to two sets of cover supports bars 66, 68. These cover and side plates have a number of holes or openings ~ormed therein to receive bolts, screws, ri~et~, etc. most of which axe not ~hown, in order to avoid a cluttered dx~wing. A transition mount 70 is fastened to the rear edges o~ the cover and side plates 60-64 in order to provide a tran ition betw~en the reotangular cross-section of the hou~ing ~nd the circular cross-section o~ the wand 3~. A bracket 72 spreads and secures the lower opposed corners of side plates 62, 64 while securing the bottom of tran~ition mount 70.
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9 ~ ~ ~
The nozzle 74 for dispensing the mastic has a nozzleoutlet or control valve 76 and a mastic inlet 7R~ Valve 76 sets in outlet 79.
The flow of the mastic is responsive to valve 76, which in turn is controlled by components enclosed by a cover plate 110 attached to the outside of side plate 62. The components selectively rotate the nozzle inlet valve 76 responsive to the operator~ finger tip control, thus making it act as a stop-cock valve. The control structure comprises a valve actuator 1 ver 112 . mounted on a bearing 1~4 integrally formed on a shoulder screw 116. A driving gear 118 and a driven gear 120 are turned as the lever arm 112 rotates under an urging of an air or pneumatic cylinder 122 which is coupled to arm 112 via shaft 124, which is attached to an outar end of arm 112 by a bolt 126. The sha~t ~24 passes through an arcuate slot 128 in the side plate. 62 so that it is free to move with and as air cylinder 122 extends or retracts.
Thus, responsive to a ~inger tip control 34 (Fig.
1), as air cylinder 122 extends it~ a~m, chaft 124 moves arm 112 in one direction to rotate wheel ~18 in one direction. This turns g~ar 120 and the mastic ~low :
control stop-cock valve 76 to one position. When air : cylinder 122 retract~ its arm, the process i~ opposite ~` in order to rotate the valve 76 to an opposite position.
This opens and closes the mastic Plow control valve 76 depending upon the position of the air cylinder arm.
. ~; . . . . .
- .
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.~ ~
. . .
, % ~ 9 Two 0-rings 130 seal the openinys 131 at the ends of valve 76 to prevent an escape o~ the mastic ~rom the nozzle 74 into the interior of head 42.
The tape control and advance mechanism begins with two rubber pinch rollers 132, 134 ~o~nt d on hub units 136, 138, respectively. Hub 136 is mounted on shaf~ 140 while hub 13~ is mounted on shaPt 142. ~hese ~hafts and hubs are rotatably supported by suitable bearings and related equipmentO rhe tape pas~es between pinch rollers 13~, 134 and through tape guides 148, 150 which have two confronting guide slots 152, 154 for the tape to pass through. The tape issuing from slots 152, 154 passes through a slot 156 in an inlet block of metal.
A guillo~ine cu~ter blade 160 is mounted on a cutter blade holder 162 having a pair of upstanding ears 16~, 166 which are coupled to a cutter actuator arm 168 by a pin 170. The actuator arm 168 is controlled by a pneumatic or air cylinder 175 which is ~ecured in place by a pair of brackets 172, 174.
An anvil 176 is positioned to ~h~ar the tape when the guillotine cutter blade 160 moYes up and then down.
A ~ea~ spring 178 keeps the pressure upon the a~vil ~which insures the shearing action by a movement o~ the : .
blade 160. Normally, the air cylinder 175 holds th2 cutter blade 160 in an ~levated position~ When a ~inger tip push button is pressed at 34 (Fig. 1), the air or pneumatic cylinder 175 move6 ~ctuator arm 168 which, in turn, lowers blade 160 and cu~s the tape. Therea~ter cylinder 175 returns the blade to its starting position.
. . . : - , .
, ' ' , '~' ~ ''' ' ' ' :~ ' : ' ~ , : .~
2 ~
The cutter assembly is completed by a cover 171 and b~se 173. Plate 175 i a tape guide. Two rollers 177, 179 assist in guiding the tape.
The con~rol an advance of the tap 38 (Fig. 1), a S rack and pinion 1~4 (Fig. ~) is actu~ted by an air or pneumatic cylinder 186 re ponsive to control lever 40 (Fig. 1). Two huhs 188, 190 ar2 8upported on a tape wheel shaf~ 192 which also receives a ~reaser arm 194 carrying a creaser wheel 196 that i8 especially useful when tape is applied to an inside corner of the drywall.
The movement of creaser arm 94 is controlled by a ~reaser cable lg8 and return spring 200. As the cr~aser arm and wheel press the center o~ the tape while it is being applied to the wall, spring 173 provides enough give to apply a predetermined amount of pressure to the tape. Outside of the hubs 188, 190 are two tape wheels 202, 204 which press the edges o~ the tape into place.
Two tape wheel hub ass~mblies 206, 208 hold the wheels in place on shaft 192.
20 ~ The operation of the tool should now be apparent.
The compressor 22 (Fig. 1) is started and pressurized mastic is foroed through hose 28 and wand 32. At the push of a finger tip push button at 34~, air cylinder 122 operates to rotate ma tic flow control valve 76, and ~thereby enable mastic to ~low out of outlet 79 and on the wall. The tape i5 deposit~d on the drywall and is embedded in the ~astir as rack and pinion 184 re6pond to air cylinder 186. As air cylinder 186 operates rack and , . . . .
:
.
.:
2 ~ 9 g pinion 184, the pinch roller wheels 132, 134 rotate and deliver the tape from their nip toward the wall.
The worker move~ wand 32 to distribute the mastic and tape ~ver th~ wall in order to fill a crack, ~or exam~le. When the worker reaches an.end of a crack, he pushes a suitable push ~u~sn (not ~hown) at 34 (Fig. 1). Air cylinder 122 rotates valve 76 to cut o~f the flow ~ mastic. ~t the same time, air cylinder 175 moves the guillotine cutter blade 160 to ~hear the tape.
This ~ool provides many advantages over other ~ools which have been known in the past.
1. There are longer operating times betwee~
loadings. The tool system holds up to ten gallon of joint compound in its hopper/pump combination cart.
2. Th2re is lower operator fatigue. The taper is lighter in weight. Its controls are finger-operated air valves requiring little effort.
3. All mechanical functions (tape advance, tape outting, and compound flow control~ are aarried out by an operation of the air cylinders.
' 4. There are no user-r~placeable parts. Tape cutting and advance mechanisms are factory ~et and maintained.
5. No special training i6 reguired on behalf o~
the operators. They need only to learn the location o~ the controls.
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2 q~
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6. Maintenance by the user is limited to connecting the tool to a water hose and - ~lushing out the system at the end o~ the day.
Those who are skilled in the art will readily perc~ive how to modify the invention_ Therefore, the appended claims are to be construed to cover all equivalent struc:tures which fall within the true l;cope and spirit of the invention.
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' 4. There are no user-r~placeable parts. Tape cutting and advance mechanisms are factory ~et and maintained.
5. No special training i6 reguired on behalf o~
the operators. They need only to learn the location o~ the controls.
. ..
, :' ' ' . ,: ' . - .
2 q~
-- 10 ~
6. Maintenance by the user is limited to connecting the tool to a water hose and - ~lushing out the system at the end o~ the day.
Those who are skilled in the art will readily perc~ive how to modify the invention_ Therefore, the appended claims are to be construed to cover all equivalent struc:tures which fall within the true l;cope and spirit of the invention.
`
~ . ~
`' ~ ' '' ' . '
Claims (14)
1. A large-volume, pneumatically-controlled drywall mastic and tape applicator comprising a wand having a taping and mastic delivery head, means attached at one end, power driven means in said head for substantially simultaneously applying tape and mastic to a point of application on wallboard or drywall surfaces, and finger tip operated means on said wand for pneumatically controlling the power driven means in the delivery head of said applicator.
2. The applicator of claim 2, and means for delivering said mastic under pressure to said taping and mastic delivery head, a nozzle valve for controlling a flow of said pressurized mastic out of said head, and means responsive to a pneumatic cylinder for controlling the operation of said valve to regulate the flow of the mastic.
3. The applicator of claim 11 and a tape control and advance mechanism in the taping and mastic delivery head, a pair of pinch rollers for delivering the tape into a desired position, a pneumatic cylinder for turning said pinch rollers in order to deliver said tape from said head, and cutter means for cutting the tape once it has been applied to the wallboard or drywall surfaces.
4. The applicator of claim 3, wherein said pinch roller comprises a pair of rubber rollers mounted on hub units with said tape passing through a nip between said pinch rollers, and said tape control and advance mechanism comprises a rack and pinion driven by a pneumatic cylinder for turning said pinch rollers and controlling the advance of the tape.
5. The applicator of claim 3, wherein said delivery head further comprises a creaser wheel mounted on a spring biased arm for pressing aid tape into a corner, and tape wheels for pressing the edges of the tape into place on said wall.
6. The applicator of claim 3, wherein said cutter means comprises a guillotine cutter blade, a cutter controlling pneumatic cylinder, and means responsive to said cutter controlling pneumatic cylinder for controlling the upward and downward movement of said guillotine cutter blade.
7. The applicator of claims 1-6 wherein the pneumatic controlling means comprise a plurality of pneumatic cylinders for individually controlling the functions of said applicator in response to said finger tip controls on said wand.
8. The applicator of claim 1, further comprising a hose consisting of a conduit for pressurized mastic and an air line for supplying pressurizing air for powering a plurality of pneumatic cylinders in said delivery head, said conduit and air line being connected to an opposite end of said wand which is opposite to the and onto which said delivery head is connected.
9. The applicator of claim 8 and a stop-cock valve, one of said pneumatic cylinders being a part of means for controlling a rotation of said stop-cock valve to regulate a flow of the mastic onto the wall.
10. The applicator of claim 8, and a pair of pinch wheels, a rack and pinion coupled to rotate said pinch wheels and control the advance of the tape, one of said pneumatic cylinders being part of means for actuating said rack and pinion.
11. The applicator of claim 8, and a guillotine cutter, one of said pneumatic cylinders being part of a control means for effectuating upward and downward movements of said guillotine cutter blade for cutting said tape.
12. A drywall installation tool system comprising supply means for supplying a large volume of drywall mastic and pressurized air, a wand having a tape and mastic delivery head attached to one end thereof, means for conveying said pressurized mastic and air from said supply means to said delivery head via said wand, a supply of tape mounted on said wand for delivery to said delivery head, a plurality of air cylinders in said head for controlling a flow of mastic and a delivery of tape to a drywall, and control means on said wand for individually controlling said air cylinders.
13. The drywall tool of claim 12 further comprising: a valve means in said head for controlling the flow of mastic to said wall, a rack and pinion set of pinch rollers for delivering said tape, and a guillotine cutter for cutting said tape; said plurality of air cylinders being individually associated with said valve means, said rack and pinion, and said cutters; and means on said wand for individually controlling said air cylinders.
14. The drywall tool of claim 13 and means for disconnecting said drywall mastic supply means from said wand and for connecting a source of pressurized water in place of said mastic supply means whereby said wand and delivery head may be cleaned out by running water from said pressurized water source through said wand and delivery head.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US75117191A | 1991-08-28 | 1991-08-28 | |
| US07/751,171 | 1991-08-28 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2094919A1 true CA2094919A1 (en) | 1993-03-01 |
Family
ID=25020799
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002094919A Abandoned CA2094919A1 (en) | 1991-08-28 | 1992-08-28 | Pneumatically controlled mechanized applicator for drywall mastic and tape |
Country Status (6)
| Country | Link |
|---|---|
| EP (1) | EP0558722A1 (en) |
| JP (1) | JPH06501757A (en) |
| KR (1) | KR930702169A (en) |
| CA (1) | CA2094919A1 (en) |
| MX (1) | MX9204959A (en) |
| WO (1) | WO1993004878A1 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2011119532A2 (en) * | 2010-03-22 | 2011-09-29 | Graco Minnesota Inc. | Creaser wheel actuation mechanism |
| CN110259052B (en) * | 2019-06-17 | 2021-06-15 | 山东金博防腐材料有限公司 | Painting equipment for water-based epoxy anticorrosive paint |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3260638A (en) * | 1962-05-29 | 1966-07-12 | Merrill D Muttart | Taper and mastic applicator |
| US4127434A (en) * | 1976-11-08 | 1978-11-28 | Corban Industries, Inc. | Dry wall taping machine having pneumatic assisted operation |
| US4090914A (en) * | 1977-04-04 | 1978-05-23 | Service Equipment Design Co., Inc. | Apparatus for applying tape and adhesive to wallboard joints |
| US4934017A (en) * | 1985-07-17 | 1990-06-19 | Rug Doctor, Inc. | Modular vacuum cleaning system |
| US4654924A (en) * | 1985-12-31 | 1987-04-07 | Whirlpool Corporation | Microcomputer control system for a canister vacuum cleaner |
| US4825502A (en) * | 1987-07-06 | 1989-05-02 | Rexair, Inc. | Device for visual inspection of fluid flow |
| US4949424A (en) * | 1989-01-23 | 1990-08-21 | William Shero | Carpet cleaning system |
-
1992
- 1992-08-27 MX MX9204959A patent/MX9204959A/en unknown
- 1992-08-28 JP JP5505310A patent/JPH06501757A/en active Pending
- 1992-08-28 EP EP92919366A patent/EP0558722A1/en not_active Withdrawn
- 1992-08-28 WO PCT/US1992/007301 patent/WO1993004878A1/en not_active Application Discontinuation
- 1992-08-28 CA CA002094919A patent/CA2094919A1/en not_active Abandoned
-
1993
- 1993-04-28 KR KR1019930701251A patent/KR930702169A/en not_active Application Discontinuation
Also Published As
| Publication number | Publication date |
|---|---|
| WO1993004878A1 (en) | 1993-03-18 |
| KR930702169A (en) | 1993-09-08 |
| JPH06501757A (en) | 1994-02-24 |
| MX9204959A (en) | 1993-02-01 |
| EP0558722A1 (en) | 1993-09-08 |
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