EP0095181B1 - Liquid applicator apparatus - Google Patents
Liquid applicator apparatus Download PDFInfo
- Publication number
- EP0095181B1 EP0095181B1 EP83105104A EP83105104A EP0095181B1 EP 0095181 B1 EP0095181 B1 EP 0095181B1 EP 83105104 A EP83105104 A EP 83105104A EP 83105104 A EP83105104 A EP 83105104A EP 0095181 B1 EP0095181 B1 EP 0095181B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- nozzle
- sump
- cam
- plate
- movement
- 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
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Classifications
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- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H23/00—Processes or apparatus for adding material to the pulp or to the paper
- D21H23/02—Processes or apparatus for adding material to the pulp or to the paper characterised by the manner in which substances are added
- D21H23/22—Addition to the formed paper
- D21H23/46—Pouring or allowing the fluid to flow in a continuous stream on to the surface, the entire stream being carried away by the paper
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B15/00—Details of spraying plant or spraying apparatus not otherwise provided for; Accessories
- B05B15/50—Arrangements for cleaning; Arrangements for preventing deposits, drying-out or blockage; Arrangements for detecting improper discharge caused by the presence of foreign matter
- B05B15/52—Arrangements for cleaning; Arrangements for preventing deposits, drying-out or blockage; Arrangements for detecting improper discharge caused by the presence of foreign matter for removal of clogging particles
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B15/00—Details of spraying plant or spraying apparatus not otherwise provided for; Accessories
- B05B15/50—Arrangements for cleaning; Arrangements for preventing deposits, drying-out or blockage; Arrangements for detecting improper discharge caused by the presence of foreign matter
- B05B15/55—Arrangements for cleaning; Arrangements for preventing deposits, drying-out or blockage; Arrangements for detecting improper discharge caused by the presence of foreign matter using cleaning fluids
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- 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
- B05C5/00—Apparatus in which liquid or other fluent material is projected, poured or allowed to flow on to the surface of the work
- B05C5/02—Apparatus in which liquid or other fluent material is projected, poured or allowed to flow on to the surface of the work the liquid or other fluent material being discharged through an outlet orifice by pressure, e.g. from an outlet device in contact or almost in contact, with the work
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- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H5/00—Special paper or cardboard not otherwise provided for
- D21H5/0005—Processes or apparatus specially adapted for applying liquids or other fluent materials to finished paper or board, e.g. impregnating, coating
- D21H5/0042—Processes or apparatus specially adapted for applying liquids or other fluent materials to finished paper or board, e.g. impregnating, coating by pouring or allowing to flow in a continuous stream onto the surface, the entire stream being carried away by the paper
Definitions
- This invention relates to liquid applicator apparatus of the type which includes a nozzle having a tip through which a liquid is dispensable; a sump'adapted to contain a material which prevents hardening of said liquid; a cam member; drive means for moving said cam member; means for operatively coupling said nozzle and said sump to said cam member, which when driven provides for movement of said nozzle and sump between a common storage position in which said nozzle tip is located in said sump and an operating position for said nozzle for applying liquid and a standby position of said sump outside the path of movement of said nozzle, respectively; spring means associated with said nozzle and said sump, respectively, for moving them towards a common storage position.
- US-A-3,908,869 discloses apparatus for dispensing an air-curable liquid, such as a silicone rubber, through a nozzle.
- an air-curable liquid such as a silicone rubber
- a mechanism which automatically moves the dispensing end of the nozzle to a storage position in which it is immersed in a reservoir of liquid, such as oil.
- the oil forms an air-tight seal around the end of the nozzle.
- the apparatus of the Little patent (US-A-3,908,869) is described as useful for forming a silicone rubber gasket. While the apparatus disclosed in the above-mentioned patent prevents nozzle clogging during periods of non-use, the nozzle must undergo a relatively complex motion each time it is removed from and returned to its storage position. The reason for this is that the storage reservoir is stationary and the nozzle must move in two mutually perpendicular directions relative to it in order to move between its storage and operating positions. This movement slows down the liquid dispensing process and limits the use of such apparatus. Moreover, should there be an interruption in the power applied to the nozzle moving mechanism, the nozzle will not return automatically to its storage position, and clogging will be inevitable.
- US-A-3,709,110 discloses liquid applicator apparatus of the above-defined kind. While the apparatus disclosed prevents nozzle clogging during periods of non-use, the design is rather complex. Three separate drive means are necessary to rotate a cam, to pivot a cam follower coupled to the nozzle and to pivot a sump carrier, respectively. This also leads to relatively complex coordinating means and, therefore, all in all to a great number of individual parts necessary to perform the desired function. Moreover, should there be an interruption in hydraulic power, the nozzle and sump will not automatically return to their common storage position, and clogging will be inevitable.
- a spring-controlled valve while assuring lifting of the nozzle into its storage position in a non-operating condition as long as hydraulic pressure is applied will merely move to the right by its spring force, however it cannot "urge” the nozzle or sump towards their common storage position at any time of an interruption in hydraulic power.
- the object of this invention is to improve a liquid applicator apparatus of the above type in which the movement of a liquid dispensing nozzle between a clog-preventing storage reservoir and an operating position can be accomplished by a relatively simple mechanism allowing for the automatic return of the nozzle to the sump in case of any power failure.
- the liquid applicator apparatus of the invention (of the type disclosed in US-A-3,709,110) is characterized in that the coupling means comprises A) a pivotally mounted cam plate carrying the sump and having a cam surface that is directly engaged by said cam member and B) a carrier on which said nozzle is mounted, said carrier having a cam surface that is directly engaged by the cam member and C) that said spring means automatically urges said nozzle and said sump towards their common storage position.
- the applicator 200 includes a nozzle assembly 202 which comprises a cylindrical housing 204, a nozzle tip 206 through which a liquid material, e.g. a liquid adhesive can be dispensed, and an inlet port 208 through which adhesive is supplied to the nozzle assembly.
- the liquid to be dispensed can be furnished to the nozzle assembly 202 from a source of pressurized material (not shown).
- the nozzle assembly 202 preferably includes a solenoid operated valve 210, forming part of the nozzle, which is under control of a logic and control unit LCU 211 (FIG. 2). Valve 210 controls the flow of adhesive through the applicator in response to signals from the LCU.
- Nozzle assembly 202 is rigidly coupled to and supported by a plate 260 by means of a sleeve- shaped gripper 262.
- Plate 260 is slidably mounted between a pair of rails 224 and 226 carried by a mechanism plate 222.
- the plate 260 is retained in its position between rails 224, 226 by a retainer 264 that is secured to rail 226 by a fastener 266.
- the retainer 264 has a flange portion that overlies part of the plate 260 to prevent it from moving away from the mechanism plate 222.
- a lip (not shown) can be provided on the outer edge of rail 224 to limit movement of plate 260 away from plate 222.
- the plate 260 is mounted for reciprocating movement in a vertical direction and in a plane parallel to and adjacent to the surface of plate 222.
- the nozzle assembly first moves from a storage position (FIG. 1) to an intermediate position (FIG. 2) and then to an operating position (FIG. 3).
- the tip 206 of the nozzle When the nozzle assembly is in its storage position the tip 206 of the nozzle is located in a sump generally designated 212. As the nozzle assembly is moved from its storage position to its intermediate position, tip 206 is withdrawn from the sump. As the nozzle assembly moves from its intermediate position to its operating position, the sump is swung to the side, as described below, away from the path of movement of the nozzle assembly.
- Sump 212 comprises a hollow container 214 having on the top thereof a seal 216 of rubber or similar elastomeric material.
- container 214 is formed of a clear transparent material.
- the container holds a liquid solvent 215 (FIG. 1), such as water, for the adhesive material being dispensed through the nozzle.
- a liquid solvent 215 such as water
- the machine operator can readily determine if there is sufficient liquid in the container to cover the tip end of the nozzle.
- the seal 216 prevents spilling and drying of the liquid in the container.
- Suitable detectors (not shown), such as mechanical switches or emitter-detectors, can be used to sense the presence of the applicator at its operating position or its storage position and to provide a signal to LCU 211.
- a mechanism generally designated 220 is provided for moving the sump 212 between the two positions shown in FIGS. 1 and 3. Such movement of the sump occurs simultaneously with movement of the nozzle assembly 202 between its intermediate position (FIG. 2) and its operating position (FIG. 3).
- Mechanism 220 comprises a cam plate 228 which is pivotally mounted on mechanism plate 222 by a pivot pin 230.
- the sump 212 is secured to the lower end of the cam plate 228.
- An opening in the upper end of the cam plate is defined by two arcuate cam follower surfaces 232 and 234 which meet adjacent to the pivot 230.
- An eccentrically mounted circular cam 236 fits between the cam follwer surfaces 232 and 234 with one face of the cam being adjacent the surface of the plate 222.
- a drive shaft 238 is journalled in a housing 240 (FIG. 4) projecting from the rear of plate 222.
- One end of the drive shaft 238 is connected to the cam 236 and the axis of the shaft 238 is offset from the center of the cam 236 so that rotation of the shaft is effective to cause eccentric movement of the cam about the axis of the shaft.
- the end of the shaft 238 opposite from the cam has a gear 242 mounted thereon.
- Gear 242 is driven from a gear sector 244 that pivots about a shaft 246.
- the sector has an integral arm portion 248 that is connected at 250 to a rod 252 of a pneumatic cylinder 254 (FIG. 5).
- a pneumatic cylinder 254 (FIG. 5).
- cam 236 When cam 236 is driven in a clockwise direction from the position shown in FIG. 3, the edge of cam 236 engages the cam follower surface 232 to swing plate 228 in a clockwise direction about pivot 230, thereby to bring the plate and sump 212 to the positions illustrated in FIGS. 1 and 2.
- cam 236 When cam 236 is driven in a counterclockwise direction from the position shown in FIG. 2, the edge of cam 236 engages cam follower surface 234 to drive the plate 228 in a counterclockwise direction about pivot 230, thereby moving the plate and the sump 212 to the FIG. 3 position.
- Plate 260 has a narrow slot 268 that extends horizontally across the upper end portion of the plate.
- a pin 270 is eccentrically mounted on the cam 236 and projects through slot 268 in plate 260.
- pin 270 swings through an arcuate path about the axis of shaft 238 and also travels along slot 268, thereby effecting vertical reciprocating movement of plate 260 between rails 224, 226 and in a plane generally parallel to the plate 222.
- the applicator assembly is carried by the plate 260 and therefor also reciprocates vertically as the plate is moved.
- the applicator assembly 202 is moved first vertically upwardly from its FIG. 1 storage position to its FIG.
- rotation of the cam 236 is effected by a pneumatic cylinder 254 which has a spring for returning rod 252 to the cylinder when pneumatic pressure is removed.
- the adhesive applicator assembly 202 and the sump 212 are returned from their FIG. 3 positions to their FIG. 1 positions for storage in the event of a power failure which would shut off the source of the pneumatic pressure. This is desirable because it always returns the end 206 of the applicator to the sump 212 so that adhesive in the end of the applicator will not dry out and clog the system during non-gluing operations due to power failure.
- the nozzle tip 206 is located in the storage position illustrated in FIG. 1. At this time the nozzle tip is positioned inside the sump 212 and is covered by the liquid solvent 215 to prevent drying out or clogging of the adhesive material in the lower end of the nozzle tip.
- pneumatic cylinder 254 is energized with air or other gas under pressure to extend the rod 252 and thereby effect movement of the great sector 244 to rotate the drive shaft 238 in a counterclockwise direction as viewed in FIGS. 1-3.
- Rotation of shaft 238 drives the eccentrically mounted cam 236 in an eccentric path about the axis of shaft 238 from its FIG. 1 position through its FIG.
- cam plate 228 During initial movement of the parts from the FIG. 1 to the FIG. 2 position, cam plate 228 remains stationary while the plate 260 is lifted upwardly by movement of the pin 270 along the slot 268. Cam 236 rotates freely within the cam surfaces 232, 234 at this time without causing movement of the cam plate 228. This brings the part to the position illustrated in FIG. 2 where the nozzle tip 206 has been lifted out of the sump 212. Further rotation of shaft 238 in a counterclockwise direction causes cam 236 to engage cam follower surface 234 and thereby swing the cam plate 228, about pivot pin 230, from the FIG. 2 position to the FIG. 3 position where the sump 212 is located to the right of the path of movement of the nozzle tip 206.
- valve 210 can be opened in response to a signal from the LCU 211 to effect flow of adhesive out of the tip 206 onto a sheet of paper, for example, (not shown) as relative movement is effected between the nozzle and the sheet of paper. Such relative movement may occur by movement of the sheet of paper past the tip of the nozzle.
- the apparatus of this embodiment provides a relatively simple mechanism for moving the nozzle and sump between their respective positions and also effects return of the nozzle to the sump in case of power failure, etc.
- the use of the cam and cam followers, and the pin 270 and slot 268, provide positive control of the parts during movement and insures precise positioning of the parts in their operating and storage positions.
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- Coating Apparatus (AREA)
Description
- This invention relates to liquid applicator apparatus of the type which includes a nozzle having a tip through which a liquid is dispensable; a sump'adapted to contain a material which prevents hardening of said liquid; a cam member; drive means for moving said cam member; means for operatively coupling said nozzle and said sump to said cam member, which when driven provides for movement of said nozzle and sump between a common storage position in which said nozzle tip is located in said sump and an operating position for said nozzle for applying liquid and a standby position of said sump outside the path of movement of said nozzle, respectively; spring means associated with said nozzle and said sump, respectively, for moving them towards a common storage position.
- US-A-3,908,869 (Little) discloses apparatus for dispensing an air-curable liquid, such as a silicone rubber, through a nozzle. During periods of non-use, clogging of the nozzle is avoided by a mechanism which automatically moves the dispensing end of the nozzle to a storage position in which it is immersed in a reservoir of liquid, such as oil. The oil forms an air-tight seal around the end of the nozzle. After the nozzle is immersed in the oil, all air-contacted material in the nozzle is purged from the nozzle into the oil and then a back pressure is applied to the material in the nozzle to draw part of it upwardly into the nozzle and thus draw some of the oil from the. reservoir into the nozzle. The apparatus of the Little patent (US-A-3,908,869) is described as useful for forming a silicone rubber gasket. While the apparatus disclosed in the above-mentioned patent prevents nozzle clogging during periods of non-use, the nozzle must undergo a relatively complex motion each time it is removed from and returned to its storage position. The reason for this is that the storage reservoir is stationary and the nozzle must move in two mutually perpendicular directions relative to it in order to move between its storage and operating positions. This movement slows down the liquid dispensing process and limits the use of such apparatus. Moreover, should there be an interruption in the power applied to the nozzle moving mechanism, the nozzle will not return automatically to its storage position, and clogging will be inevitable.
- US-A-3,709,110 discloses liquid applicator apparatus of the above-defined kind. While the apparatus disclosed prevents nozzle clogging during periods of non-use, the design is rather complex. Three separate drive means are necessary to rotate a cam, to pivot a cam follower coupled to the nozzle and to pivot a sump carrier, respectively. This also leads to relatively complex coordinating means and, therefore, all in all to a great number of individual parts necessary to perform the desired function. Moreover, should there be an interruption in hydraulic power, the nozzle and sump will not automatically return to their common storage position, and clogging will be inevitable. A spring-controlled valve, while assuring lifting of the nozzle into its storage position in a non-operating condition as long as hydraulic pressure is applied will merely move to the right by its spring force, however it cannot "urge" the nozzle or sump towards their common storage position at any time of an interruption in hydraulic power.
- The object of this invention is to improve a liquid applicator apparatus of the above type in which the movement of a liquid dispensing nozzle between a clog-preventing storage reservoir and an operating position can be accomplished by a relatively simple mechanism allowing for the automatic return of the nozzle to the sump in case of any power failure.
- The liquid applicator apparatus of the invention (of the type disclosed in US-A-3,709,110) is characterized in that the coupling means comprises A) a pivotally mounted cam plate carrying the sump and having a cam surface that is directly engaged by said cam member and B) a carrier on which said nozzle is mounted, said carrier having a cam surface that is directly engaged by the cam member and C) that said spring means automatically urges said nozzle and said sump towards their common storage position.
- The invention and its advantages will become more apparent in the detailed description of a preferred embodiment presented below. Reference is made to the accompanying drawings, in which:
- FIGS. 1-3 illustrate an embodiment of the invention in which a clog-preventing liquid sump is pivotally mounted for movement between a nozzle-storing position and a displaced position; and
- FIG. 4 is a side elevation view, partly broken away, taken along line 4-4 of FIG. 3; and
- FIG. 5 is a side elevation view taken along the line 5-5 of FIG. 4.
- Referring now to FIGS. 1-5 of the drawings, a preferred embodiment of the adhesive applicator apparatus of the present invention is generally designated 200. The
applicator 200 includes anozzle assembly 202 which comprises acylindrical housing 204, anozzle tip 206 through which a liquid material, e.g. a liquid adhesive can be dispensed, and an inlet port 208 through which adhesive is supplied to the nozzle assembly. The liquid to be dispensed can be furnished to thenozzle assembly 202 from a source of pressurized material (not shown). Thenozzle assembly 202 preferably includes a solenoid operatedvalve 210, forming part of the nozzle, which is under control of a logic and control unit LCU 211 (FIG. 2). Valve 210 controls the flow of adhesive through the applicator in response to signals from the LCU. -
Nozzle assembly 202 is rigidly coupled to and supported by aplate 260 by means of a sleeve-shaped gripper 262.Plate 260 is slidably mounted between a pair ofrails mechanism plate 222. Theplate 260 is retained in its position betweenrails retainer 264 that is secured torail 226 by afastener 266. Theretainer 264 has a flange portion that overlies part of theplate 260 to prevent it from moving away from themechanism plate 222. A lip (not shown) can be provided on the outer edge ofrail 224 to limit movement ofplate 260 away fromplate 222. Thus theplate 260 is mounted for reciprocating movement in a vertical direction and in a plane parallel to and adjacent to the surface ofplate 222. Asplate 260 slides upwardly and then downwardly betweenrails - When the nozzle assembly is in its storage position the
tip 206 of the nozzle is located in a sump generally designated 212. As the nozzle assembly is moved from its storage position to its intermediate position,tip 206 is withdrawn from the sump. As the nozzle assembly moves from its intermediate position to its operating position, the sump is swung to the side, as described below, away from the path of movement of the nozzle assembly. -
Sump 212 comprises ahollow container 214 having on the top thereof aseal 216 of rubber or similar elastomeric material. Preferably,container 214 is formed of a clear transparent material. The container holds a liquid solvent 215 (FIG. 1), such as water, for the adhesive material being dispensed through the nozzle. Thus when thetip 206 of the nozzle is in thesump 212 any material in the lower end of the nozzle will not dry out, cake or clog the end of the nozzle. By makingcontainer 214 of a transparent material the machine operator can readily determine if there is sufficient liquid in the container to cover the tip end of the nozzle. Theseal 216 prevents spilling and drying of the liquid in the container. Suitable detectors (not shown), such as mechanical switches or emitter-detectors, can be used to sense the presence of the applicator at its operating position or its storage position and to provide a signal to LCU 211. - A mechanism generally designated 220 is provided for moving the
sump 212 between the two positions shown in FIGS. 1 and 3. Such movement of the sump occurs simultaneously with movement of thenozzle assembly 202 between its intermediate position (FIG. 2) and its operating position (FIG. 3).Mechanism 220 comprises acam plate 228 which is pivotally mounted onmechanism plate 222 by apivot pin 230. Thesump 212 is secured to the lower end of thecam plate 228. An opening in the upper end of the cam plate is defined by two arcuatecam follower surfaces pivot 230. An eccentrically mountedcircular cam 236 fits between thecam follwer surfaces plate 222. Adrive shaft 238 is journalled in a housing 240 (FIG. 4) projecting from the rear ofplate 222. One end of thedrive shaft 238 is connected to thecam 236 and the axis of theshaft 238 is offset from the center of thecam 236 so that rotation of the shaft is effective to cause eccentric movement of the cam about the axis of the shaft. - The end of the
shaft 238 opposite from the cam has agear 242 mounted thereon. Gear 242 is driven from agear sector 244 that pivots about ashaft 246. The sector has anintegral arm portion 248 that is connected at 250 to arod 252 of a pneumatic cylinder 254 (FIG. 5). Thus when thecylinder 254 is supplied with air under pressure,rod 252 is extended to effect rotation ofgear sector 244 and thereby rotate thegear 242 and thedrive shaft 238 to turn thecam 236. When pneumatic pressure is released, a return spring in thecylinder 254 effects movement of the parts in the opposite direction. - When
cam 236 is driven in a clockwise direction from the position shown in FIG. 3, the edge ofcam 236 engages thecam follower surface 232 toswing plate 228 in a clockwise direction aboutpivot 230, thereby to bring the plate andsump 212 to the positions illustrated in FIGS. 1 and 2. Whencam 236 is driven in a counterclockwise direction from the position shown in FIG. 2, the edge ofcam 236 engagescam follower surface 234 to drive theplate 228 in a counterclockwise direction aboutpivot 230, thereby moving the plate and thesump 212 to the FIG. 3 position. -
Plate 260 has anarrow slot 268 that extends horizontally across the upper end portion of the plate. Apin 270 is eccentrically mounted on thecam 236 and projects throughslot 268 inplate 260. As the cam is rotated about the axis ofshaft 238,pin 270 swings through an arcuate path about the axis ofshaft 238 and also travels alongslot 268, thereby effecting vertical reciprocating movement ofplate 260 betweenrails plate 222. The applicator assembly is carried by theplate 260 and therefor also reciprocates vertically as the plate is moved. Thus theapplicator assembly 202 is moved first vertically upwardly from its FIG. 1 storage position to its FIG. 2 elevated position as the cam is rotated approximately 90° counterclockwise, and then the applicator assembly is moved downwardly from its FIG. 2 position to its FIG. 3 operating position as the cam rotates an additional 180° counterclockwise. Reverse movement of the cam effects movement of the applicator assembly from the FIG. 3 position upwardly to the FIG. 2 position and then back downwardly to the FIG. 1 position. - As the cam moves counterclockwise from the FIG. 1 to the FIG. 2 position, the cam moves freely within the opening defined by
cam followers cam plate 228. Therefore, the plate remains in its FIG. 1 position during such movement of the cam. Further counterclockwise movement of the cam from its FIG. 2 position causes the cam to engage the surface ofcam follower 234 and thereby swing the cam plate aboutpivot 230 from its FIG. 2 position to its FIG. 3 position. Such movement swings thesump 212 to the right and out of the path of movement of the applicator assembly as the assembly moves from its most elevated position illustrated in FIG. 2 to its operating position illustrated in FIG. 3. - As mentioned previously, rotation of the
cam 236 is effected by apneumatic cylinder 254 which has a spring for returningrod 252 to the cylinder when pneumatic pressure is removed. As a result, theadhesive applicator assembly 202 and thesump 212 are returned from their FIG. 3 positions to their FIG. 1 positions for storage in the event of a power failure which would shut off the source of the pneumatic pressure. This is desirable because it always returns theend 206 of the applicator to thesump 212 so that adhesive in the end of the applicator will not dry out and clog the system during non-gluing operations due to power failure. - Operation of the apparatus will now be described. During the periods of non-use the
nozzle tip 206 is located in the storage position illustrated in FIG. 1. At this time the nozzle tip is positioned inside thesump 212 and is covered by the liquid solvent 215 to prevent drying out or clogging of the adhesive material in the lower end of the nozzle tip. When it is desired to use the nozzle for applying adhesive,pneumatic cylinder 254 is energized with air or other gas under pressure to extend therod 252 and thereby effect movement of thegreat sector 244 to rotate thedrive shaft 238 in a counterclockwise direction as viewed in FIGS. 1-3. Rotation ofshaft 238 drives the eccentricallymounted cam 236 in an eccentric path about the axis ofshaft 238 from its FIG. 1 position through its FIG. 2 position to its FIG. 3 position. As this occurs thepin 270 travels along theslot 268 in thecam plate 228 from its extreme right position (FIG. 1), through the position shown in FIG. 2, to an extreme left position (not shown), and finally to its position shown in FIG. 3. - During initial movement of the parts from the FIG. 1 to the FIG. 2 position,
cam plate 228 remains stationary while theplate 260 is lifted upwardly by movement of thepin 270 along theslot 268.Cam 236 rotates freely within the cam surfaces 232, 234 at this time without causing movement of thecam plate 228. This brings the part to the position illustrated in FIG. 2 where thenozzle tip 206 has been lifted out of thesump 212. Further rotation ofshaft 238 in a counterclockwise direction causescam 236 to engagecam follower surface 234 and thereby swing thecam plate 228, aboutpivot pin 230, from the FIG. 2 position to the FIG. 3 position where thesump 212 is located to the right of the path of movement of thenozzle tip 206. Promptly after the sump has been swung to the side to its FIG. 3 position andplate 260 has been raised to its uppermost position, pin 270 drivesplate 260 downwardly, thereby lowering thenozzle tip 206 to its operating position shown in FIG. 3. At thistime valve 210 can be opened in response to a signal from theLCU 211 to effect flow of adhesive out of thetip 206 onto a sheet of paper, for example, (not shown) as relative movement is effected between the nozzle and the sheet of paper. Such relative movement may occur by movement of the sheet of paper past the tip of the nozzle. - After application of the adhesive is completed, the air or the gas under pressure supplied to
cylinder 254 is shut off to allow the return spring in the cylinder to retract therod 252. This moves thegear sector 244 andgear 242, thereby to effect rotation ofdrive shaft 238 in a clockwise direction as viewed in FIGS. 1-3. During initial movement of the drive shaft in a clockwise direction from its FIG. 3 position,plate 260 is raised from its FIG. 3 to its FIG. 2 position due to movement ofpin 270 inslot 268. As theplate 260 is being raised to its FIG. 2 position, thecam 236 engagescam follower surface 232 to pivot thecam plate 228 from its FIG. 3 position to its FIG. 2 position and thereby locate thesump 212 in a position immediately beneath thetip 206 of the nozzle as shown in FIG. 2. - Continued rotation of
drive shaft 238 in a clockwise direction causespin 270 to move from its FIG. 2 position to its FIG. 1 position, thereby drivingplate 260 downwardly and causingtip 206 of the nozzle assembly to penetrateseal 216 and be inserted into thesump 212 to a point where it is beneath the level of the solvent 215 in the sump. Because this return movement of the parts from the FIG. 3 position to the FIG. 1 position is effected by a return spring in thecylinder 254, such return movement will be accomplished anytime there is a failure in power, etc. which is effective to shut off the supply of fluid under pressure to thecylinder 254. Thus the nozzle is always returned to the sump to prevent clogging of adhesive in the end of the nozzle in the event of inadvertent shut down of the apparatus. - The apparatus of this embodiment provides a relatively simple mechanism for moving the nozzle and sump between their respective positions and also effects return of the nozzle to the sump in case of power failure, etc. The use of the cam and cam followers, and the
pin 270 andslot 268, provide positive control of the parts during movement and insures precise positioning of the parts in their operating and storage positions.
Claims (3)
characterized in that the coupling means comprises
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US380964 | 1982-05-24 | ||
US06/380,964 US4461404A (en) | 1982-05-24 | 1982-05-24 | Apparatus for moving an adhesive applicator |
US380965 | 1982-05-24 | ||
US06/380,965 US4489856A (en) | 1982-05-24 | 1982-05-24 | Method and apparatus for moving a nozzle between a storage position and a position for applying a fluid |
Publications (3)
Publication Number | Publication Date |
---|---|
EP0095181A2 EP0095181A2 (en) | 1983-11-30 |
EP0095181A3 EP0095181A3 (en) | 1985-07-03 |
EP0095181B1 true EP0095181B1 (en) | 1987-09-23 |
Family
ID=27009184
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP83105104A Expired EP0095181B1 (en) | 1982-05-24 | 1983-05-24 | Liquid applicator apparatus |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP0095181B1 (en) |
DE (1) | DE3373797D1 (en) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
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DE19719000A1 (en) * | 1997-05-06 | 1998-11-12 | Focke & Co | Method and device for applying glue to blanks for packages |
EP1842599A3 (en) * | 2006-04-04 | 2008-07-23 | Baumer hhs GmbH | Method and device for cleaning a discharging device with at least one fluid discharge opening for applying a fluid |
ITUD20120132A1 (en) * | 2012-07-20 | 2014-01-21 | Cps Color Equipment S P A Con Unic O Socio | DEVICE TO PREVENT DRYING OF NOZZLES OF A MACHINE TO PREPARE FLUID DYES PRODUCTS |
CN111804506B (en) * | 2020-07-05 | 2022-09-09 | 苏州韩迅机器人系统有限公司 | Continuous glue pouring machine and glue pouring process thereof |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2336042A (en) * | 1941-05-03 | 1943-12-07 | Compo Shoe Machinery Corp | Fluid coating machine |
GB993620A (en) * | 1963-05-01 | 1965-06-02 | Emhart Corp | Improvements in and relating to glue applying apparatus |
US3517646A (en) * | 1968-04-25 | 1970-06-30 | Valco Inc | Adhesive application apparatus |
US3709110A (en) * | 1970-12-24 | 1973-01-09 | Fibreboard Corp | Apparatus and method for applying collars to container blanks |
DE3012371C2 (en) * | 1980-03-29 | 1983-06-30 | Maschinenfabrik Alfred Schmermund Gmbh & Co, 5820 Gevelsberg | Glue applicator |
-
1983
- 1983-05-24 DE DE8383105104T patent/DE3373797D1/en not_active Expired
- 1983-05-24 EP EP83105104A patent/EP0095181B1/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
EP0095181A2 (en) | 1983-11-30 |
DE3373797D1 (en) | 1987-10-29 |
EP0095181A3 (en) | 1985-07-03 |
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