EP2355682B1 - Absorbent sheet dispenser having improved hand sensor performance - Google Patents

Absorbent sheet dispenser having improved hand sensor performance Download PDF

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Publication number
EP2355682B1
EP2355682B1 EP09753258.4A EP09753258A EP2355682B1 EP 2355682 B1 EP2355682 B1 EP 2355682B1 EP 09753258 A EP09753258 A EP 09753258A EP 2355682 B1 EP2355682 B1 EP 2355682B1
Authority
EP
European Patent Office
Prior art keywords
dispenser
conductive element
metallic
hand sensor
electrical communication
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.)
Active
Application number
EP09753258.4A
Other languages
German (de)
French (fr)
Other versions
EP2355682A1 (en
Inventor
John S. Formon
Scott Wagner
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.)
Essity Professional Hygiene North America LLC
Original Assignee
SCA Tissue North America LLC
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 SCA Tissue North America LLC filed Critical SCA Tissue North America LLC
Publication of EP2355682A1 publication Critical patent/EP2355682A1/en
Application granted granted Critical
Publication of EP2355682B1 publication Critical patent/EP2355682B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47K—SANITARY EQUIPMENT NOT OTHERWISE PROVIDED FOR; TOILET ACCESSORIES
    • A47K10/00—Body-drying implements; Toilet paper; Holders therefor
    • A47K10/24—Towel dispensers, e.g. for piled-up or folded textile towels; Toilet-paper dispensers; Dispensers for piled-up or folded textile towels provided or not with devices for taking-up soiled towels as far as not mechanically driven
    • A47K10/32—Dispensers for paper towels or toilet-paper
    • A47K10/34—Dispensers for paper towels or toilet-paper dispensing from a web, e.g. with mechanical dispensing means
    • A47K10/36—Dispensers for paper towels or toilet-paper dispensing from a web, e.g. with mechanical dispensing means with mechanical dispensing, roll switching or cutting devices
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47K—SANITARY EQUIPMENT NOT OTHERWISE PROVIDED FOR; TOILET ACCESSORIES
    • A47K10/00—Body-drying implements; Toilet paper; Holders therefor
    • A47K10/24—Towel dispensers, e.g. for piled-up or folded textile towels; Toilet-paper dispensers; Dispensers for piled-up or folded textile towels provided or not with devices for taking-up soiled towels as far as not mechanically driven
    • A47K10/32—Dispensers for paper towels or toilet-paper
    • A47K10/34—Dispensers for paper towels or toilet-paper dispensing from a web, e.g. with mechanical dispensing means
    • A47K10/36—Dispensers for paper towels or toilet-paper dispensing from a web, e.g. with mechanical dispensing means with mechanical dispensing, roll switching or cutting devices
    • A47K10/3606—The cutting devices being motor driven
    • A47K10/3612—The cutting devices being motor driven with drive and pinch rollers
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47K—SANITARY EQUIPMENT NOT OTHERWISE PROVIDED FOR; TOILET ACCESSORIES
    • A47K10/00—Body-drying implements; Toilet paper; Holders therefor
    • A47K10/24—Towel dispensers, e.g. for piled-up or folded textile towels; Toilet-paper dispensers; Dispensers for piled-up or folded textile towels provided or not with devices for taking-up soiled towels as far as not mechanically driven
    • A47K10/32—Dispensers for paper towels or toilet-paper
    • A47K10/34—Dispensers for paper towels or toilet-paper dispensing from a web, e.g. with mechanical dispensing means
    • A47K10/36—Dispensers for paper towels or toilet-paper dispensing from a web, e.g. with mechanical dispensing means with mechanical dispensing, roll switching or cutting devices
    • A47K10/3606—The cutting devices being motor driven
    • A47K10/3625—The cutting devices being motor driven with electronic control means
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47K—SANITARY EQUIPMENT NOT OTHERWISE PROVIDED FOR; TOILET ACCESSORIES
    • A47K10/00—Body-drying implements; Toilet paper; Holders therefor
    • A47K10/24—Towel dispensers, e.g. for piled-up or folded textile towels; Toilet-paper dispensers; Dispensers for piled-up or folded textile towels provided or not with devices for taking-up soiled towels as far as not mechanically driven
    • A47K10/32—Dispensers for paper towels or toilet-paper
    • A47K10/34—Dispensers for paper towels or toilet-paper dispensing from a web, e.g. with mechanical dispensing means
    • A47K10/36—Dispensers for paper towels or toilet-paper dispensing from a web, e.g. with mechanical dispensing means with mechanical dispensing, roll switching or cutting devices
    • A47K2010/3668—Detection of the presence of a user

Definitions

  • This invention relates to hands-free dispensers for absorbent sheet products (preferably paper towels), and provides dispensers having improved hand sensor performance in hands-free mode.
  • a dispenser for dispensing lengths of products is known from US 2008/100982 A1 which represents the closest prior art.
  • the present inventors have discovered that one or more of these problems can be mitigated by providing a conductive path from one or more of the metal surfaces that interferes with the intended operation of the dispenser, to a charge receiver that is positioned more remote from the hand sensor than the interfering metal surfaces.
  • the invention hands-free dispenser is characterized by the features of claim 1. Preferred embodiments follow from the other claims.
  • the invention is preferably applied to hands-free dispensers utilizing capacitive proximity sensors for hand detection, as described for example in United States Published Patent Application No. 2007/0234868 , but may also be applied to dispensers utilizing hand sensors that operate on different detection principles, such as active or passive infrared hand sensors.
  • the invention preferably draws charge away from a metallized front cover and/or a metal dispensing roller mounted within the dispenser housing, but it will be appreciated that the invention may draw charge away from any metal surface or component of the dispenser, or away from any metal article proximate the dispenser, that interferes with the intended manner of dispenser operation.
  • a conductive wire is mounted inside the dispenser housing, and is electrically connected at one end to both a metallized dispenser cover and a rotating aluminum pinch roll mounted within the dispenser.
  • the wire is preferably encased in plastic or other insulating material intermediate its exposed ends.
  • the wire is preferably connected at its other exposed end to a negative terminal of the battery compartment that holds the batteries powering the dispenser.
  • the electrical contact will be established by suitable means such as a metallic brush element.
  • suitable means such as a metallic brush element.
  • the electrical contact occur through the intermediary of a conductive element such as a metallic spring that is mounted on the dispenser body, and which is in electrical contact with the dispenser cover only when the cover is closed.
  • interfering metal surfaces and components will typically not be connected to the charge receiver other than by the conductive element according to the invention.
  • a wire supplying driving current to an electric motor would not be a conductive element according to the invention, because such a wire is attendant to the normal operation of the motor.
  • the interfering metal surfaces according to the invention are therefore those that are not necessarily connected to the charge receiver, be it the battery compartment or another charge receiver, for their conventional operation.
  • the conductive path can take forms other than that of a wire, for example, a metallic element mounted to an interior surface of the dispenser body.
  • a metallic element whether in the form of a wire or flexible plate, may be encased in insulating material intermediate the connections to the interfering surfaces and the charge receiver, or may be exposed in these intermediate regions.
  • interior brackets are formed in the dispenser body at the time of injection molding of the same, and the conductive element is positioned in these brackets.
  • the brackets may hold a conductive element that has already been provided with an insulating covering, or the brackets may themselves provide an insulating covering that partially or completely covers an otherwise exposed conductive element.
  • the charge receiver is the negative terminal of the battery compartment, which utilizes the batteries as a charge sink when the dispenser is in operation.
  • the charge receiver may take the form of other metallic elements either inside or outside the dispenser housing, provided that such charge receiver is positioned at a greater distance from the hand sensor than the interfering metallic surfaces to which the conductive element is connected at its other end. It is nevertheless preferred that the charge receiver be a metallic component inside the dispenser housing, in light of the benefits described above.
  • the invention is applicable to battery-powered dispensers.
  • hard-wired dispensers draw their current supply from the mains of the facility in which they are installed.
  • the distal end of the conductive element would be connected to a suitable charge receiver inside or outside of the dispenser.
  • a cassette of a hands-free dispenser is shown, that incorporates the one version of the improvement of the present invention. That cassette corresponds to the cassette shown in the figures of United States Published Patent Application No. 2007/0234868 .
  • a conductive wire encased in plastic is connected at one end to both an aluminum pinch roll (corresponding to the roll 16 shown in Fig. 5 of United States Published Patent Application No. 2007/0234868 ) via a metallic bracket and a metallic brush, and (via the same metallic bracket) to a metallic spring that is in electrical contact with the dispenser cover when this latter is closed.
  • proximate end connection The particulars of this proximate end connection are shown at greater magnification in Fig. 2 .
  • the wire is connected to the negative terminal of the battery compartment, and hence to the negative side of the batteries when the dispenser is in use, as shown in greater detail in Fig. 3 .

Landscapes

  • Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Orthopedics, Nursing, And Contraception (AREA)
  • Battery Mounting, Suspending (AREA)
  • Absorbent Articles And Supports Therefor (AREA)
  • Coating Apparatus (AREA)
  • Elimination Of Static Electricity (AREA)
  • Control Of Vending Devices And Auxiliary Devices For Vending Devices (AREA)

Description

  • This invention relates to hands-free dispensers for absorbent sheet products (preferably paper towels), and provides dispensers having improved hand sensor performance in hands-free mode.
  • The present inventors have recognized that the presence of metal objects or surfaces in hands-free dispensers, in the vicinity of the hand sensor, sometimes adversely affects the hand sensor performance. United States Published Patent Application No. 2007/0234868 describes a hands-free dispenser in which a capacitive hand (proximity) sensor projects through an opening in the front cover of the dispenser, which permits the dispenser cover to have a metallic outer surface.
  • When developing dispensers as described in United States Published Patent Application No. 2007/0234868 , it has been found that when the cover has a nickel-plated outer surface, the performance of the capacitive hand sensor can be adversely affected, resulting, for example, in decreased sensitivity of the hand sensor, hypersensitivity of the hand sensor, and/or spontaneous shutting down of the hand sensor. Additional problems can arise due to accumulation of static electricity on the metallic dispenser parts and/or surfaces, which can result in problems such as double feeding of the absorbent sheet through the internal rollers of the dispenser, spontaneous shutting down of the hand sensor, and uncontrolled dispensing of paper.
  • A dispenser for dispensing lengths of products is known from US 2008/100982 A1 which represents the closest prior art.
  • The present inventors have discovered that one or more of these problems can be mitigated by providing a conductive path from one or more of the metal surfaces that interferes with the intended operation of the dispenser, to a charge receiver that is positioned more remote from the hand sensor than the interfering metal surfaces.
  • The invention hands-free dispenser is characterized by the features of claim 1. Preferred embodiments follow from the other claims.
  • The invention is preferably applied to hands-free dispensers utilizing capacitive proximity sensors for hand detection, as described for example in United States Published Patent Application No. 2007/0234868 , but may also be applied to dispensers utilizing hand sensors that operate on different detection principles, such as active or passive infrared hand sensors.
  • The invention preferably draws charge away from a metallized front cover and/or a metal dispensing roller mounted within the dispenser housing, but it will be appreciated that the invention may draw charge away from any metal surface or component of the dispenser, or away from any metal article proximate the dispenser, that interferes with the intended manner of dispenser operation.
  • In a preferred embodiment, a conductive wire is mounted inside the dispenser housing, and is electrically connected at one end to both a metallized dispenser cover and a rotating aluminum pinch roll mounted within the dispenser. The wire is preferably encased in plastic or other insulating material intermediate its exposed ends. The wire is preferably connected at its other exposed end to a negative terminal of the battery compartment that holds the batteries powering the dispenser. This embodiment provides a self-contained conductive path that does not complicate the installation of the dispenser; and although the wire does not serve to ground the metal surfaces to any object outside the dispenser, it nevertheless provides improved hand sensor performance by providing a conductive path between the interfering metal surfaces and the more rearwardly-positioned battery compartment.
  • When the conductive element is connected at its proximate end to a moving member such as an aluminum pinch roll, the electrical contact will be established by suitable means such as a metallic brush element. When the conductive element is connected at its proximate end to the dispenser cover, it is preferred that the electrical contact occur through the intermediary of a conductive element such as a metallic spring that is mounted on the dispenser body, and which is in electrical contact with the dispenser cover only when the cover is closed.
  • It will be appreciated that the interfering metal surfaces and components will typically not be connected to the charge receiver other than by the conductive element according to the invention. For example, a wire supplying driving current to an electric motor would not be a conductive element according to the invention, because such a wire is attendant to the normal operation of the motor. The interfering metal surfaces according to the invention are therefore those that are not necessarily connected to the charge receiver, be it the battery compartment or another charge receiver, for their conventional operation.
  • It will be appreciated that the conductive path can take forms other than that of a wire, for example, a metallic element mounted to an interior surface of the dispenser body. Such a metallic element, whether in the form of a wire or flexible plate, may be encased in insulating material intermediate the connections to the interfering surfaces and the charge receiver, or may be exposed in these intermediate regions. In another embodiment, interior brackets are formed in the dispenser body at the time of injection molding of the same, and the conductive element is positioned in these brackets. The brackets may hold a conductive element that has already been provided with an insulating covering, or the brackets may themselves provide an insulating covering that partially or completely covers an otherwise exposed conductive element.
  • As noted above, the charge receiver is the negative terminal of the battery compartment, which utilizes the batteries as a charge sink when the dispenser is in operation. In embodiments not covered by the present invention, the charge receiver may take the form of other metallic elements either inside or outside the dispenser housing, provided that such charge receiver is positioned at a greater distance from the hand sensor than the interfering metallic surfaces to which the conductive element is connected at its other end. It is nevertheless preferred that the charge receiver be a metallic component inside the dispenser housing, in light of the benefits described above.
  • The invention is applicable to battery-powered dispensers. In embodiments not covered by the invention, hard-wired dispensers draw their current supply from the mains of the facility in which they are installed. In that case, the distal end of the conductive element would be connected to a suitable charge receiver inside or outside of the dispenser.
  • The accompanying figures illustrate a preferred embodiment of the invention. In Fig. 1, a cassette of a hands-free dispenser is shown, that incorporates the one version of the improvement of the present invention. That cassette corresponds to the cassette shown in the figures of United States Published Patent Application No. 2007/0234868 . As shown in Fig. 1, a conductive wire encased in plastic is connected at one end to both an aluminum pinch roll (corresponding to the roll 16 shown in Fig. 5 of United States Published Patent Application No. 2007/0234868 ) via a metallic bracket and a metallic brush, and (via the same metallic bracket) to a metallic spring that is in electrical contact with the dispenser cover when this latter is closed. The particulars of this proximate end connection are shown at greater magnification in Fig. 2. At its distal end, the wire is connected to the negative terminal of the battery compartment, and hence to the negative side of the batteries when the dispenser is in use, as shown in greater detail in Fig. 3.

Claims (10)

  1. A hands-free dispenser for dispensing lengths of absorbent sheet products, said dispenser comprising:
    a dispenser body containing a dispensing mechanism;
    a hand sensor for detecting the presence of a user's hand in the vicinity of the dispenser;
    a battery compartment;
    an elongated metallic conductive element having a proximate end in electrical communication with at least one interfering metal surface of said dispenser positioned at a first location relative to said hand sensor, and a distal end in electrical communication with at least one charge receiver positioned at a second location relative to said hand sensor, the second location being at a greater distance from the hand sensor than the first location, whereby the hand sensor's performance is improved by providing a conductive path between the at least one interfering metal surface and the more rearwardly positioned battery compartment;
    characterized in that
    the charge receiver is a metallic negative terminal of the battery compartment, which is positioned within the dispenser body.
  2. The dispenser as claimed in claim 1, wherein the elongated metallic conductive element is a wire.
  3. The dispenser as claimed in claim 2, wherein the wire is encased in insulating material intermediate its proximate and distal ends.
  4. The dispenser as claimed in claim 1, wherein the elongated metallic conductive element is fully contained within said dispenser body.
  5. The dispenser as claimed in claim 1, wherein the elongated metallic conductive element is in electrical communication at its proximate end with at least one of a metallized dispenser cover and a metallic pinch roller.
  6. The dispenser as claimed in claim 1, wherein the elongated metallic conductive element is in electrical communication at its proximate end with a metallic pinch roller via a metallic brush.
  7. The dispenser as claimed in claim 1, wherein the elongated metallic conductive element is in electrical communication at its proximate end with a metallized dispenser cover via a metallic spring mounted on the dispenser body.
  8. The dispenser as claimed in claim 1, wherein the elongated metallic conductive element is a flexible metallic plate or leaf.
  9. The dispenser as claimed in claim 8, wherein the elongated metallic conductive element is mounted in brackets molded into at least one interior surface of said dispenser body.
  10. The dispenser as claimed in claim 1, wherein the interfering metal surfaces are not connected to the charge receiver other than by the conductive element.
EP09753258.4A 2008-12-02 2009-10-28 Absorbent sheet dispenser having improved hand sensor performance Active EP2355682B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US11923608P 2008-12-02 2008-12-02
PCT/US2009/062331 WO2010065215A1 (en) 2008-12-02 2009-10-28 Absorbent sheet dispenser having improved hand sensor performance

Publications (2)

Publication Number Publication Date
EP2355682A1 EP2355682A1 (en) 2011-08-17
EP2355682B1 true EP2355682B1 (en) 2016-08-17

Family

ID=41692551

Family Applications (1)

Application Number Title Priority Date Filing Date
EP09753258.4A Active EP2355682B1 (en) 2008-12-02 2009-10-28 Absorbent sheet dispenser having improved hand sensor performance

Country Status (9)

Country Link
EP (1) EP2355682B1 (en)
CN (1) CN102231962B (en)
AU (1) AU2009322874A1 (en)
BR (1) BRPI0923221A2 (en)
CL (1) CL2011000997A1 (en)
CO (1) CO6361873A2 (en)
MX (1) MX2011004653A (en)
RU (1) RU2508040C2 (en)
WO (1) WO2010065215A1 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7837077B2 (en) * 2006-03-28 2010-11-23 Sca Tissue North America, Llc Hands-free powered absorbent sheet dispenser
US10568470B2 (en) * 2014-11-07 2020-02-25 Essity Hygiene And Health Aktiebolag Battery compartment, an electronically driven dispensing unit and a dispenser

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5630196A (en) * 1994-12-19 1997-05-13 Xerox Corporation Recyclable photoreceptor end flange
JPH1129237A (en) * 1997-07-09 1999-02-02 Brother Ind Ltd Sheet body discharging device
ITME20000006A1 (en) * 2000-07-27 2000-10-27 Giovanni Signorino UN-SHOCKED - UNKNOWN DEVICE.
US20080100982A1 (en) * 2006-10-30 2008-05-01 Lewis Richard P System and method for dissipating static electricity in an electronic sheet material dispenser

Also Published As

Publication number Publication date
RU2011127133A (en) 2013-01-10
CL2011000997A1 (en) 2011-09-16
CO6361873A2 (en) 2012-01-20
EP2355682A1 (en) 2011-08-17
CN102231962B (en) 2014-01-08
BRPI0923221A2 (en) 2016-01-26
RU2508040C2 (en) 2014-02-27
MX2011004653A (en) 2011-05-30
CN102231962A (en) 2011-11-02
AU2009322874A1 (en) 2010-06-10
WO2010065215A1 (en) 2010-06-10

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