US20140054410A1 - Paper dispenser having a one-way spring clutch - Google Patents
Paper dispenser having a one-way spring clutch Download PDFInfo
- Publication number
- US20140054410A1 US20140054410A1 US13/972,483 US201313972483A US2014054410A1 US 20140054410 A1 US20140054410 A1 US 20140054410A1 US 201313972483 A US201313972483 A US 201313972483A US 2014054410 A1 US2014054410 A1 US 2014054410A1
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- United States
- Prior art keywords
- wrap
- spring clutch
- turn knob
- arm
- dispensing
- 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
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Classifications
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- 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
- A47K10/3631—The cutting devices being driven manually
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- 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
- A47K10/3631—The cutting devices being driven manually
- A47K10/3637—The cutting devices being driven manually using a crank or handle
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D41/00—Freewheels or freewheel clutches
- F16D41/20—Freewheels or freewheel clutches with expandable or contractable clamping ring or band
- F16D41/206—Freewheels or freewheel clutches with expandable or contractable clamping ring or band having axially adjacent coils, e.g. helical wrap-springs
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D55/00—Brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes
- F16D55/02—Brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes with axially-movable discs or pads pressed against axially-located rotating members
- F16D55/04—Brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes with axially-movable discs or pads pressed against axially-located rotating members by moving discs or pads away from one another against radial walls of drums or cylinders
- F16D55/14—Brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes with axially-movable discs or pads pressed against axially-located rotating members by moving discs or pads away from one another against radial walls of drums or cylinders with self-tightening action, e.g. by means of coacting helical surfaces or balls and inclined surfaces
- F16D55/15—Brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes with axially-movable discs or pads pressed against axially-located rotating members by moving discs or pads away from one another against radial walls of drums or cylinders with self-tightening action, e.g. by means of coacting helical surfaces or balls and inclined surfaces initiated by means of brake-bands or brake-shoes
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D65/00—Parts or details
- F16D65/02—Braking members; Mounting thereof
- F16D65/04—Bands, shoes or pads; Pivots or supporting members therefor
- F16D65/06—Bands, shoes or pads; Pivots or supporting members therefor for externally-engaging brakes
- F16D65/065—Brake bands
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D7/00—Slip couplings, e.g. slipping on overload, for absorbing shock
- F16D7/02—Slip couplings, e.g. slipping on overload, for absorbing shock of the friction type
- F16D7/022—Slip couplings, e.g. slipping on overload, for absorbing shock of the friction type with a helical band or equivalent member co-operating with a cylindrical torque limiting coupling surface
-
- 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
- A47K10/3656—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 with paper jam preventing devices
Definitions
- the present invention relates to paper dispensers. More specifically, the present invention relates to paper dispensers having a turn-knob for manually rotating a mechanism dispensing paper web from a paper supply.
- Paper dispensers having a dispensing mechanism with a dispensing drum are well known in the art.
- a dispensing drum commonly both feeds and cuts paper web into sheets and may be actuated in various ways, such as manually using a turn knob, with an electric motor or by using a spring loaded mechanism activated by a user pulling on a tail of the paper.
- the dispensing drum holds a cutting knife which rapidly extends from the drum, thus cutting the paper running along the periphery of the drum.
- each revolution of the dispensing drum corresponds to the length of a paper sheet, so that the cutting knife is extended and retracted once per each revolution.
- the dispensing drum is often also a driving element, meaning that its pulls paper from the paper supply and feeds it further to a user.
- Such kinds of paper dispensers are commonly equipped with a turn knob for manually rotating the dispensing drum, even if the dispensing drum is primarily actuated by other means. Rotating the dispensing drum manually may be necessary in the event of an unwanted tear of the paper, particularly in the case that the dispensing drum is primarily actuated by a user pulling on the tail of the paper.
- Another situation where the dispensing drum has to be rotated manually is when a new paper roll is introduced to the dispenser and the paper web has to be threaded through the dispensing mechanism.
- a turn knob is often coupled to the dispensing drum via a one-way clutch allowing the turn knob to be rotated in only one direction. Rotating the dispensing drum in the wrong direction can cause the paper web to unthread from the dispensing mechanism or even damage the dispensing mechanism, depending on its structure. Also, equipping the turn knob with a one-way clutch makes threading the dispensing mechanism more simple to the operator replacing a new paper roll to the dispenser as the turn knob can only be rotated in the correct direction. Common ways of implementing a one-way clutch are using a free wheel mechanism or a wrap spring clutch.
- the dispensing drum might have to be rotated in an opposite direction during certain situations.
- the paper web may have to pulled out from the inlet side of the dispensing mechanism in connection with replacing a paper roll.
- a paper blockage may also occur, and again, the paper web may have to be pulled out of the dispensing mechanism from the inlet side.
- the one-way clutch of a turn knob has to be releasable. With a gear and pawl type ratcheting freewheel releasing the one-way clutch can be done by simply turning the pawl outwards, but providing such a release operation has been problematic with wrap-spring type clutches.
- An object of the present invention is to overcome the above-identified problems associated with the dispensers of the prior art.
- a particular object is to provide a paper dispenser having a turn knob that can be freely rotated in one direction while rotation in another direction is blocked unless a force exceeding a certain amount is applied to the turn knob in said another direction.
- a paper dispenser according to the present invention overcomes the drawbacks without the need for complex and expensive one-way clutch mechanisms.
- FIG. 1 shows a perspective view of a portion of a dispensing mechanism and a wrap-spring clutch according to an embodiment of the invention
- FIG. 2 illustrates a turn knob and a wrap-spring clutch according to an embodiment of the invention
- FIG. 1 a side portion of a dispensing mechanism 1 of a paper dispenser and a wrap-spring clutch 2 can be seen.
- the rest of the paper dispenser is not shown in FIG. 1 .
- a pin 1 a and a stopper 1 b protrude from the side portion of the dispensing mechanism 1 , through which an axle 1 c of a dispensing drum (not shown) extends.
- the wrap-spring clutch 2 having a first arm 2 a and a second arm 2 b extending from a central coil 2 c, is illustrated in a position corresponding to a normal operation condition of the paper dispenser.
- the side portion of the dispensing mechanism 1 and the wrap-spring coil 2 would be at least partially covered by a turn knob or a housing, or both.
- FIG. 2 a perspective view of a turn knob 3 is illustrated.
- the turn knob 3 has an inner hub 3 a, around which the coil 2 c of the wrap spring clutch 2 is wrapped.
- the turn knob 3 is illustrated from a side facing the dispensing mechanism during operation of the paper dispenser.
- a dispenser comprises a housing capable of holding at least one paper supply, such as a roll.
- any paper supply providing a substantially continuous web can be used.
- a paper web is led from the paper supply via a dispensing mechanism 1 to be dispensed to a user through an opening in the housing.
- the dispensing mechanism 1 may also be used to cut the paper web in sheets prior to dispensing.
- the paper web is led to run along a cylindrical circumference of a dispensing drum. As the dispensing drum is rotated, the paper web is pulled from the paper supply, into the dispensing mechanism 1 and fed towards the opening in the housing to be dispensed.
- the dispensing drum may be equipped with an extending and retracting cutting knife for cutting the paper web into sheets.
- a turn knob 3 is directly connected to a center axle 1 c of the dispensing drum for enabling manual rotation.
- Other arrangements such as connecting the turn knob 3 to the dispensing drum via gears or belts, may also be used.
- the inside of an inner hub 3 a locks rotationally onto the axle 1 c extending axially from the dispensing drum's center axis, through the side portion of the dispensing mechanism 1 .
- the wrap-spring clutch 2 is placed around the hub 3 a.
- the inner diameter of the wrap-spring clutch's central coil 2 c corresponds substantially to an outer diameter of said hub 3 a, so that the wrap-spring clutch 2 fits tightly onto the inner hub 3 a.
- the first arm 2 a Extending from the wrap-spring clutch 2 , the first arm 2 a is attached to a stationary point.
- the end of the first arm 2 a is bent to form a loop, which is wrapped around the pin 1 a on the dispensing mechanism.
- the first arm 2 a could be attached to another stationary point, such as the housing.
- the wrap-spring clutch 2 and its first arm 2 a are arranged so that when the turn knob 3 is rotated to turn the dispensing drum in the direction of its typical operation, the wrap-spring clutch 2 strives to rotate along with the turn knob 3 .
- the first arm 2 a being attached to the pin 1 a, causes the first arm 2 a to pushed against the pin 1 a when turn knob is rotated. This prevents the wrap-spring clutch 2 from rotating along with the turn knob 3 , and further exerts a force on the first arm 2 a causing the wrap-spring clutch 2 to slightly unwind, thus allowing the turn knob 3 and the dispensing drum to rotate freely in a first direction.
- the stationary first arm 2 a exerts a force causing the wrap spring clutch 2 to tighten around the inner hub 3 a.
- the wrap spring clutch 2 tightens, the amount of force required to rotate the turn knob 3 and the dispensing drum in the second direction becomes increasingly larger, thus effectively preventing the turn knob 3 and the dispensing drum from being rotated.
- Due to the resilient nature of the wrap-spring clutch 2 there is a small backlash before the turn knob 3 and the dispensing drum are prevented from being rotated. But as stated above, the amount of force required to rotate the turn knob 3 and the dispensing drum in the second direction increases during this backlash.
- the wrap-spring clutch 2 On the other side of the wrap-spring clutch 2 , opposite to the first arm 2 a, there is a second arm 2 b extending from the wrap-spring's coil 2 c.
- a stationary stopper 2 b is arranged along the rotational travel path of the second arm 2 b in the second direction.
- the stopper 1 b may be attached to the dispensing mechanism 1 or the housing, for example.
- This arrangement effectively limits the amount of force required to rotate the turn knob 3 and the dispensing drum in the second direction.
- the amount of force required to rotate the knob 3 and the dispensing drum in the second direction should be sufficiently large enough to prevent undesirable rotation in said second direction, yet small enough not to cause breakage of any components, such as the pin 1 a.
- the stopper 1 b should be located along the travel path of the second arm 2 b in the second direction at such a distance that the amount of force required to rotate the turn knob 3 and the dispensing drum is as described above.
- the second arm 2 b extends outside the periphery of the turn knob 3 , suitably between said turn knob 3 and the dispensing mechanism 1 .
- This arrangement enables the second arm 2 b to be pushed in the first direction, thus slightly unwinding the wrap-spring clutch 2 and temporarily further reducing the amount of force required to rotate the turn knob 3 and the dispensing drum in the second direction.
- the second arm 2 b is no longer pushed in the second direction it automatically returns to its previous position due to the resilient nature of the wrap-spring clutch 2 .
- Such functionality is especially suitable when the paper web has to be pulled out from the inlet side of the dispensing mechanism 1 during paper supply replacement.
- the dispensing mechanism 1 or the housing is equipped with a pin or a notch for holding the second arm 2 b in a released position as described above.
- the dispensing mechanism 1 , the wrap-spring clutch 2 , the turn knob 3 and the housing of the paper dispenser are arranged so that when the paper dispenser is in a normal operation condition, i.e. the housing is closed, the wrap spring clutch 2 , namely its second arm 2 b, is located within the housing while the turn knob is located outside the housing.
- the wrap spring clutch 2 namely its second arm 2 b
- the paper dispenser to be operated manually using the turn knob 3 while access to the second arm 2 b is restricted only to people being able to open the housing, such as maintenance personnel.
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
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- Unwinding Webs (AREA)
Abstract
The present invention concerns a paper dispenser comprising a housing holding at least one paper supply and a dispensing mechanism within said housing, the dispensing mechanism having a rotatable dispensing drum. The dispenser further comprises a turn knob coupled with the dispensing drum, the turn knob having an inner hub, and a wrap-spring clutch wrapped around the inner hub. The wrap-spring clutch has a first arias extending from it and being attached to a stationary point for causing the wrap-spring clutch to slightly unwind when the turn knob is rotated in the first direction. Characteristically of the invention, the wrap-spring clutch comprises a second arm extending from it, while a stopper is located in the second arm's rotational travel path in a second rotation direction for enabling the turn knob to be rotated in the second direction against a limited braking force.
Description
- The present invention relates to paper dispensers. More specifically, the present invention relates to paper dispensers having a turn-knob for manually rotating a mechanism dispensing paper web from a paper supply.
- Paper dispensers having a dispensing mechanism with a dispensing drum are well known in the art. A dispensing drum commonly both feeds and cuts paper web into sheets and may be actuated in various ways, such as manually using a turn knob, with an electric motor or by using a spring loaded mechanism activated by a user pulling on a tail of the paper. The dispensing drum holds a cutting knife which rapidly extends from the drum, thus cutting the paper running along the periphery of the drum. Conventionally each revolution of the dispensing drum corresponds to the length of a paper sheet, so that the cutting knife is extended and retracted once per each revolution. The dispensing drum is often also a driving element, meaning that its pulls paper from the paper supply and feeds it further to a user.
- Such kinds of paper dispensers are commonly equipped with a turn knob for manually rotating the dispensing drum, even if the dispensing drum is primarily actuated by other means. Rotating the dispensing drum manually may be necessary in the event of an unwanted tear of the paper, particularly in the case that the dispensing drum is primarily actuated by a user pulling on the tail of the paper. Another situation where the dispensing drum has to be rotated manually is when a new paper roll is introduced to the dispenser and the paper web has to be threaded through the dispensing mechanism.
- To avoid misuse, a turn knob is often coupled to the dispensing drum via a one-way clutch allowing the turn knob to be rotated in only one direction. Rotating the dispensing drum in the wrong direction can cause the paper web to unthread from the dispensing mechanism or even damage the dispensing mechanism, depending on its structure. Also, equipping the turn knob with a one-way clutch makes threading the dispensing mechanism more simple to the operator replacing a new paper roll to the dispenser as the turn knob can only be rotated in the correct direction. Common ways of implementing a one-way clutch are using a free wheel mechanism or a wrap spring clutch.
- On the other hand, the dispensing drum might have to be rotated in an opposite direction during certain situations. For example, the paper web may have to pulled out from the inlet side of the dispensing mechanism in connection with replacing a paper roll. Occasionally, a paper blockage may also occur, and again, the paper web may have to be pulled out of the dispensing mechanism from the inlet side. To enable such an operation, the one-way clutch of a turn knob has to be releasable. With a gear and pawl type ratcheting freewheel releasing the one-way clutch can be done by simply turning the pawl outwards, but providing such a release operation has been problematic with wrap-spring type clutches.
- A particular problem associated with paper dispensers intended for public sanitary facilities is that they must withstand a certain amount of rough handling or even mischief. Turn knobs equipped with one-way clutches have been discovered to be especially prone to breakage under excessive forces. When a one-way clutch mechanism breaks the whole dispenser often has to be replaced.
- An object of the present invention is to overcome the above-identified problems associated with the dispensers of the prior art. A particular object is to provide a paper dispenser having a turn knob that can be freely rotated in one direction while rotation in another direction is blocked unless a force exceeding a certain amount is applied to the turn knob in said another direction.
- This object is achieved by a dispenser according to the invention as described in the characterizing part of the accompanied
claim 1. Further embodiments and objects of the present invention will come apparent from thedependent claims 2 to 4. - A paper dispenser according to the present invention overcomes the drawbacks without the need for complex and expensive one-way clutch mechanisms.
- The invention is described hereafter with reference to the following figures, where:
-
FIG. 1 shows a perspective view of a portion of a dispensing mechanism and a wrap-spring clutch according to an embodiment of the invention; -
FIG. 2 illustrates a turn knob and a wrap-spring clutch according to an embodiment of the invention; - It should be noted that the above mentioned figures are illustrated in a simplified manner for the purpose of clarity.
- In
FIG. 1 a side portion of adispensing mechanism 1 of a paper dispenser and a wrap-spring clutch 2 can be seen. For illustrative purposes the rest of the paper dispenser is not shown inFIG. 1 . Apin 1 a and astopper 1 b protrude from the side portion of thedispensing mechanism 1, through which anaxle 1 c of a dispensing drum (not shown) extends. The wrap-spring clutch 2, having afirst arm 2 a and asecond arm 2 b extending from acentral coil 2 c, is illustrated in a position corresponding to a normal operation condition of the paper dispenser. However, it should be noted that in normal operation condition of the paper dispenser, the side portion of thedispensing mechanism 1 and the wrap-spring coil 2 would be at least partially covered by a turn knob or a housing, or both. - In
FIG. 2 a perspective view of a turn knob 3 is illustrated. The turn knob 3 has aninner hub 3 a, around which thecoil 2 c of thewrap spring clutch 2 is wrapped. InFIG. 2 the turn knob 3 is illustrated from a side facing the dispensing mechanism during operation of the paper dispenser. - A dispenser according to the present invention comprises a housing capable of holding at least one paper supply, such as a roll. Naturally, any paper supply providing a substantially continuous web can be used. A paper web is led from the paper supply via a
dispensing mechanism 1 to be dispensed to a user through an opening in the housing. Thedispensing mechanism 1 may also be used to cut the paper web in sheets prior to dispensing. In thedispensing mechanism 1, the paper web is led to run along a cylindrical circumference of a dispensing drum. As the dispensing drum is rotated, the paper web is pulled from the paper supply, into thedispensing mechanism 1 and fed towards the opening in the housing to be dispensed. Furthermore, the dispensing drum may be equipped with an extending and retracting cutting knife for cutting the paper web into sheets. - A turn knob 3 is directly connected to a
center axle 1 c of the dispensing drum for enabling manual rotation. Other arrangements, such as connecting the turn knob 3 to the dispensing drum via gears or belts, may also be used. According to an embodiment of the invention, the inside of aninner hub 3 a locks rotationally onto theaxle 1 c extending axially from the dispensing drum's center axis, through the side portion of thedispensing mechanism 1. The wrap-spring clutch 2 is placed around thehub 3 a. The inner diameter of the wrap-spring clutch'scentral coil 2 c corresponds substantially to an outer diameter of saidhub 3 a, so that the wrap-spring clutch 2 fits tightly onto theinner hub 3 a. Extending from the wrap-spring clutch 2, thefirst arm 2 a is attached to a stationary point. In an embodiment according toFIG. 1 the end of thefirst arm 2 a is bent to form a loop, which is wrapped around thepin 1 a on the dispensing mechanism. Naturally, thefirst arm 2 a could be attached to another stationary point, such as the housing. - The wrap-
spring clutch 2 and itsfirst arm 2 a are arranged so that when the turn knob 3 is rotated to turn the dispensing drum in the direction of its typical operation, the wrap-spring clutch 2 strives to rotate along with the turn knob 3. However, thefirst arm 2 a being attached to thepin 1 a, causes thefirst arm 2 a to pushed against thepin 1 a when turn knob is rotated. This prevents the wrap-spring clutch 2 from rotating along with the turn knob 3, and further exerts a force on thefirst arm 2 a causing the wrap-spring clutch 2 to slightly unwind, thus allowing the turn knob 3 and the dispensing drum to rotate freely in a first direction. Consequently, when the turn knob 3 is rotated to turn the dispensing drum in a second direction, i.e. in a direction opposite to the first direction, the stationaryfirst arm 2 a exerts a force causing thewrap spring clutch 2 to tighten around theinner hub 3 a. As thewrap spring clutch 2 tightens, the amount of force required to rotate the turn knob 3 and the dispensing drum in the second direction becomes increasingly larger, thus effectively preventing the turn knob 3 and the dispensing drum from being rotated. Due to the resilient nature of the wrap-spring clutch 2, there is a small backlash before the turn knob 3 and the dispensing drum are prevented from being rotated. But as stated above, the amount of force required to rotate the turn knob 3 and the dispensing drum in the second direction increases during this backlash. - On the other side of the wrap-
spring clutch 2, opposite to thefirst arm 2 a, there is asecond arm 2 b extending from the wrap-spring'scoil 2 c. Astationary stopper 2 b is arranged along the rotational travel path of thesecond arm 2 b in the second direction. Thestopper 1 b may be attached to thedispensing mechanism 1 or the housing, for example. When the turn knob 3 and the dispensing drum are rotated in the second direction, the second 2 b arm rotates along with the wrap-spring clutch 2 during the backlash movement until it coincides with thestopper 1 b. At this point, thesecond arm 2 b pushes against thestopper 1 b and prevents the wrap-spring clutch 2 from tightening further around theinner hub 3 a. This arrangement effectively limits the amount of force required to rotate the turn knob 3 and the dispensing drum in the second direction. The amount of force required to rotate the knob 3 and the dispensing drum in the second direction should be sufficiently large enough to prevent undesirable rotation in said second direction, yet small enough not to cause breakage of any components, such as thepin 1 a. Thestopper 1 b should be located along the travel path of thesecond arm 2 b in the second direction at such a distance that the amount of force required to rotate the turn knob 3 and the dispensing drum is as described above. - In an embodiment according to the invention, the
second arm 2 b extends outside the periphery of the turn knob 3, suitably between said turn knob 3 and thedispensing mechanism 1. This arrangement enables thesecond arm 2 b to be pushed in the first direction, thus slightly unwinding the wrap-spring clutch 2 and temporarily further reducing the amount of force required to rotate the turn knob 3 and the dispensing drum in the second direction. When thesecond arm 2 b is no longer pushed in the second direction it automatically returns to its previous position due to the resilient nature of the wrap-spring clutch 2. Such functionality is especially suitable when the paper web has to be pulled out from the inlet side of thedispensing mechanism 1 during paper supply replacement. Advantageously, thedispensing mechanism 1 or the housing is equipped with a pin or a notch for holding thesecond arm 2 b in a released position as described above. - In a further embodiment of the invention, the
dispensing mechanism 1, the wrap-spring clutch 2, the turn knob 3 and the housing of the paper dispenser are arranged so that when the paper dispenser is in a normal operation condition, i.e. the housing is closed, thewrap spring clutch 2, namely itssecond arm 2 b, is located within the housing while the turn knob is located outside the housing. This enables the paper dispenser to be operated manually using the turn knob 3 while access to thesecond arm 2 b is restricted only to people being able to open the housing, such as maintenance personnel.
Claims (4)
1. A paper dispenser comprising:
a housing holding at least one paper supply;
a dispensing mechanism within said housing for cutting and dispensing paper sheets from said at least one paper supply, said dispensing mechanism having a rotatable dispensing drum;
a turn knob coupled with said dispensing drum for enabling manual rotation, said turn knob having an inner hub extending axially towards said dispensing mechanism;
a wrap-spring clutch wrapped around the inner hub of said turn knob, said wrap-spring clutch having a first arm extending from it and being attached to a stationary point for enabling free rotation of said turn knob in a first rotation direction by causing said wrap-spring clutch to slightly unwind when said turn knob is rotated in said first direction,
wherein the wrap-spring clutch comprises a second arm extending from it, a stopper being located in the second arm's rotational travel path in a second rotation direction for enabling the turn knob to be rotated in said second direction against a limited braking force exerted on said inner hub by said wrap-spring clutch tightening around said inner hub.
2. The paper dispenser according to claim 1 , wherein the second arm of said wrap-spring clutch extends outside the periphery of said turn knob.
3. The paper dispenser according to claim 1 , wherein a notch or a pin is provided for holding the second arm of said wrap-spring clutch in a displaced position in the first rotational direction
4. The paper dispenser according to claim 1 , wherein the second arm of said wrap-spring clutch is located within said housing while said turn knob is located outside said housing when said housing is closed.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP12397522.9 | 2012-08-22 | ||
EP12397522.9A EP2700344B1 (en) | 2012-08-22 | 2012-08-22 | Paper dispenser having a one-way spring clutch |
Publications (1)
Publication Number | Publication Date |
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US20140054410A1 true US20140054410A1 (en) | 2014-02-27 |
Family
ID=46832320
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US13/972,483 Abandoned US20140054410A1 (en) | 2012-08-22 | 2013-08-21 | Paper dispenser having a one-way spring clutch |
Country Status (2)
Country | Link |
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US (1) | US20140054410A1 (en) |
EP (1) | EP2700344B1 (en) |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US10045669B2 (en) | 2014-06-27 | 2018-08-14 | Cascades Canaga Ulc | Rolled product dispenser |
US10292542B2 (en) | 2013-10-16 | 2019-05-21 | Cascades Canada Ulc | Rolled product dispenser |
US10660486B2 (en) | 2017-03-17 | 2020-05-26 | Valve Solutions, Inc. | Monitoring system for dispenser |
US11109722B2 (en) | 2015-06-04 | 2021-09-07 | Charles Agnew Osborne, Jr. | Dispenser for rolled sheet materials |
US11154166B2 (en) | 2018-05-24 | 2021-10-26 | Charles Agnew Osborne, Jr. | Dispenser for rolled sheet materials |
US11344165B2 (en) | 2015-06-04 | 2022-05-31 | Kimberly-Clark Worldwide, Inc. | Dispenser for rolled sheet materials with cutting system |
US12029355B2 (en) | 2019-12-12 | 2024-07-09 | Kimberly-Clark Worldwide, Inc. | Dispenser for rolled sheet materials with motorized spindle |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2916023A1 (en) * | 2014-03-06 | 2015-09-09 | Achton Spain SL | A resilient pawl for a dispenser mechanism, a dispenser mechanism and a dispenser |
CN111374580B (en) * | 2019-12-23 | 2021-11-19 | 金红叶纸业集团有限公司 | Drum formula household paper distributor and distribution system |
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US3893554A (en) * | 1974-06-07 | 1975-07-08 | Thomas D Wason | Torque limiting clutch |
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US5482221A (en) * | 1994-07-25 | 1996-01-09 | Dean M. Peterson | Single action fly fishing reel having an infinitely variable silent drag |
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US20110133019A1 (en) * | 2009-05-27 | 2011-06-09 | Dispensing Dynamics International | Multi-function paper toweling dispenser |
-
2012
- 2012-08-22 EP EP12397522.9A patent/EP2700344B1/en not_active Not-in-force
-
2013
- 2013-08-21 US US13/972,483 patent/US20140054410A1/en not_active Abandoned
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US3111822A (en) * | 1961-04-12 | 1963-11-26 | Quinten A Hansen | Controlled torque, self-energizing wrap spring clutch or brake |
US3893554A (en) * | 1974-06-07 | 1975-07-08 | Thomas D Wason | Torque limiting clutch |
US5064137A (en) * | 1989-05-09 | 1991-11-12 | Fumito Komatsu | Fixed torque spring clutch and a winder having the same |
US5482221A (en) * | 1994-07-25 | 1996-01-09 | Dean M. Peterson | Single action fly fishing reel having an infinitely variable silent drag |
US6292646B1 (en) * | 1999-10-14 | 2001-09-18 | Lexmark International, Inc. | Anti-unraveling device for a fuser oil supply web |
US6876832B2 (en) * | 2003-06-05 | 2005-04-05 | Xerox Corporation | Fuser apparatus having cleaning web spooling prevention |
US8137204B2 (en) * | 2007-04-24 | 2012-03-20 | Samsung Electronics Co., Ltd. | Torque limiter |
Cited By (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US10292542B2 (en) | 2013-10-16 | 2019-05-21 | Cascades Canada Ulc | Rolled product dispenser |
US10806306B2 (en) | 2013-10-16 | 2020-10-20 | Cascades Canada Ulc | Rolled product dispenser |
US10045669B2 (en) | 2014-06-27 | 2018-08-14 | Cascades Canaga Ulc | Rolled product dispenser |
US11109722B2 (en) | 2015-06-04 | 2021-09-07 | Charles Agnew Osborne, Jr. | Dispenser for rolled sheet materials |
US11344165B2 (en) | 2015-06-04 | 2022-05-31 | Kimberly-Clark Worldwide, Inc. | Dispenser for rolled sheet materials with cutting system |
US10660486B2 (en) | 2017-03-17 | 2020-05-26 | Valve Solutions, Inc. | Monitoring system for dispenser |
US11154166B2 (en) | 2018-05-24 | 2021-10-26 | Charles Agnew Osborne, Jr. | Dispenser for rolled sheet materials |
US11889955B2 (en) | 2018-05-24 | 2024-02-06 | Charles Agnew Osborne, Jr. | Dispenser for rolled sheet materials |
US12029355B2 (en) | 2019-12-12 | 2024-07-09 | Kimberly-Clark Worldwide, Inc. | Dispenser for rolled sheet materials with motorized spindle |
Also Published As
Publication number | Publication date |
---|---|
EP2700344A1 (en) | 2014-02-26 |
EP2700344B1 (en) | 2015-04-15 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
AS | Assignment |
Owner name: ACHTON A/S, DENMARK Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:ACHTON, KIM;REEL/FRAME:031493/0689 Effective date: 20131004 |
|
STCB | Information on status: application discontinuation |
Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION |