Power transfer system apparatus
First Claim
1. An apparatus for dispensing a flexible web, said apparatus comprising:
- a chassis including a web discharge opening;
a feed mechanism for advancing first and second webs to the web discharge opening;
a sensor for determining when the first web is absent from a side of the feed mechanism; and
an automatic web transfer mechanism including a web transfer member for engaging the second web and a motor for driving said transfer member in response to a signal of said sensor from a rest position where said web transfer member is spaced from said feed mechanism to a web feed position where said web transfer member is in contact with the second web and positions the second web in a feed nip of the feed mechanism.
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Accused Products
Abstract
A paper towel dispenser which provides for hands free, automatic feeding of the first sheet of a primary web roll, such as a paper towel roll, into a feed mechanism when its cover is closed. The dispenser also automatically transfers its web feed supply from a primary roll to a reserve roll upon the exhaustion of the primary roll. The present invention eliminates the need for an attendant to thread the leading edge of a primary or reserve roll into the feed mechanism of the dispenser. The dispenser also eliminates wasted paper because it does not begin to feed the reserve roll until the primary roll has expired. The dispenser can include either a manual feed mechanism or a powered feed mechanism. The dispenser relies on a sensor for determining when a portion of the web is absent from a side of the feed mechanism proximate a web discharge opening. When such an absence is sensed, an automatic, powered web transfer mechanism contacts the web located in front of the feed mechanism and positions it between the rollers of the feed mechanism. The transfer mechanism includes a web transfer member and a motor for driving the transfer member in the direction of the feed mechanism. The dispenser also includes a retraction mechanism for returning the transfer bar to a rest position after the web has been introduced into the feed mechanism.
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Citations
38 Claims
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1. An apparatus for dispensing a flexible web, said apparatus comprising:
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a chassis including a web discharge opening;
a feed mechanism for advancing first and second webs to the web discharge opening;
a sensor for determining when the first web is absent from a side of the feed mechanism; and
an automatic web transfer mechanism including a web transfer member for engaging the second web and a motor for driving said transfer member in response to a signal of said sensor from a rest position where said web transfer member is spaced from said feed mechanism to a web feed position where said web transfer member is in contact with the second web and positions the second web in a feed nip of the feed mechanism. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A web dispenser comprising:
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a chassis including a web discharge opening;
a feed mechanism for advancing first and second webs to the web discharge opening;
a photo sensor for determining when the first web is absent from a side of the feed mechanism; and
an automatic web transfer mechanism including a web transfer member for introducing the second web into said feed mechanism, wherein said web transfer mechanism moves from a rest position where said web transfer member is spaced from said feed mechanism to a web feed position where said web transfer member is in contact with the second web and positions the second web in a feed nip of said feed mechanism for feeding the second web when the absence of the first web is sensed within the dispenser. - View Dependent Claims (14, 15, 16, 17, 18, 19)
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20. A web dispenser comprising:
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a chassis including a web discharge opening;
a feed mechanism for advancing first and second webs to the web discharge opening;
a sensor for determining when a leading edge of the first web is absent from a discharge side of the feed mechanism;
an automatic web transfer mechanism including a web transfer member for moving from a rest position where said web transfer member is spaced from said feed mechanism to a web feed position where the web transfer member is in contact with the second web for introducing the second web into a nip of the feed mechanism; and
a retraction mechanism for returning said transfer member to the rest position after the second web has been introduced to said feed mechanism. - View Dependent Claims (21, 22, 23, 24, 25, 26, 27, 28)
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29. A method of positioning a web in a feed mechanism of a dispenser, said method comprising the steps of:
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a) positioning a leading edge of at least one of a first and a second web proximate a first side of the feed mechanism;
b) sensing the absence of the first web on a second side of said feed mechanism;
c) activating a powered transfer drive mechanism;
d) automatically advancing a transfer bar from a rest position, where said transfer bar is spaced from said feed mechanism, toward the feed mechanism after the absence of the first web has been sensed;
e) engaging said second web with said transfer bar; and
f) advancing the second web into said feed mechanism. - View Dependent Claims (30, 31, 32, 33, 34, 35)
a) opening a cover of the dispenser;
b) moving the transfer bar away from the feed mechanism to an open cover position; and
c) loading at least one of the first and second webs into the dispenser.
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31. The method according to claim 30 wherein said at least one of said first and second webs is loaded into the dispenser before the leading edge is positioned proximate the feed mechanism.
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32. The method according to claim 30 further including the step of moving the transfer bar from the open cover position to the rest position by closing the cover of the dispenser.
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33. The method according to claim 29 wherein the step of automatically advancing the transfer bar includes rotating the transfer bar from said rest position to a web engaging position.
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34. The method according to claim 33 further including the step of automatically returning the transfer bar from the web engaging position to the rest position after the second web has been sensed on the second side of said feed mechanism.
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35. The method of claim 29 wherein said engaging step includes engaging said second web with a plurality of positioning members extending from said transfer bar in the direction of the feed mechanism.
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36. A dispenser for dispensing a flexible sheet material, said dispenser comprising:
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a chassis including a web discharge opening;
a feed mechanism for advancing first and second webs to the web discharge opening;
a sensor for detecting an absence of the first web from a discharge side of the feed mechanism; and
an automatic web transfer mechanism for introducing the second web into said feed mechanism, said web transfer mechanism including a web transfer member and a motor, wherein when the absence of the first web is sensed within the dispenser said motor is operated and said web transfer member moves from a rest position where said web transfer member is spaced from said feed mechanism to a web feeding position proximate said feed mechanism for positioning a portion of the second web proximate the feed mechanism. - View Dependent Claims (37, 38)
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Specification