EP1048244B1 - Bürstengriff - Google Patents

Bürstengriff Download PDF

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Publication number
EP1048244B1
EP1048244B1 EP19990108258 EP99108258A EP1048244B1 EP 1048244 B1 EP1048244 B1 EP 1048244B1 EP 19990108258 EP19990108258 EP 19990108258 EP 99108258 A EP99108258 A EP 99108258A EP 1048244 B1 EP1048244 B1 EP 1048244B1
Authority
EP
European Patent Office
Prior art keywords
handle
shaft
brush
portions
handle portions
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 - Lifetime
Application number
EP19990108258
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English (en)
French (fr)
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EP1048244A1 (de
Inventor
Per-Gunnar Thuresson
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Individual
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Individual
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Publication date
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Priority to EP19990108258 priority Critical patent/EP1048244B1/de
Priority to DE69909050T priority patent/DE69909050T2/de
Publication of EP1048244A1 publication Critical patent/EP1048244A1/de
Application granted granted Critical
Publication of EP1048244B1 publication Critical patent/EP1048244B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • A—HUMAN NECESSITIES
    • A46—BRUSHWARE
    • A46B—BRUSHES
    • A46B7/00—Bristle carriers arranged in the brush body
    • A46B7/04—Bristle carriers arranged in the brush body interchangeably removable bristle carriers

Definitions

  • the present invention relates generally to miniature brushes of the kind having a brush portion at one end, which is supported by an elongated shaft portion, and specifically relates to a brush handle for such a brush, of the kind indicated in the preamble of the enclosed claim 1, and to the use of such a brush handle, as specified in the enclosed claim 13.
  • European Patent no. 0 403 494 B1 discloses a brush handle for releasably receiving and supporting bristle brushes of the bottle cleaning type.
  • Said handle generally consists of two elongated handle portions being connected to each other through a folding joint provided between first ends of said portions, such that the handle portions are foldable towards each other.
  • a through-hole is provided, through which the shaft or stem of a twisted wire brush is inserted for positioning between the handle portions prior to the folding together thereof.
  • Said handle has proven to be very effective for use with interdental brushes for oral use, since it provides a firm grip for the fingers of the user and facilitates handling and manipulation of the brush in the mouth during the cleaning of teeth.
  • practical use of the disclosed handle has revealed that it suffers from certain shortcomings, mainly having regard to the insertion of the brush stem or shaft into the handle and the locking of the handle portions to each other.
  • the inserted brush shaft is only supported by a thin flange prior to the locking together of the handle portions. This in turn means that during folding of the handle portions the brush shaft remains practically unsupported and cannot be easily guided into the correct position between the handle portions.
  • the user holds one handle portion with each hand during the folding operation and accordingly has no hand free for holding and guiding the brush. It may therefore easily happen that the brush even falls out from the handle altogether during the folding operation.
  • Another limitation of the described handle is that it does not provide the optimum locking action to secure the brush in position, since the brush shaft is primarily maintained in position by gripping means provided in connection with the folding joint and engaging the brush shaft over a very restricted portion of its length and only with a clamping action.
  • the clamping or locking action of the other parts of the handle portions is rather weak.
  • U.S. Patent No. 5 758 382 discloses a brush handle for use with interdental brushes and having the same general design as that discussed above, specifically with regard to the fact that it consists of two handle portions being connected to each other at one end through a folding joint and that the shaft insertion opening is provided in the area of the folding joint.
  • the shaft insertion opening is provided in one side of the handle, intended for introducing the brush shaft in a sideways direction with regard to the longitudinal extension of the handle.
  • this latter handle provides a limited locking action to secure the brush in position, since the brush shaft is primarily maintained in position by gripping means provided in at the folding joint and engaging the brush shaft only with a clamping action.
  • U.S. Patent no. 5 293 661 discloses a handle of the same general type, but having a hinge type of folding joint in which the insertion opening is formed. This is basically a comparatively complex and expensive type of joint and the provision of the insertion opening in the joint makes the design even more complex and costly.
  • the general object of the present invention is to provide an improved brush handle that is easy to handle specifically with regard to the installation of the brush therein, and which provides appropriate support for the installed brush, while still being relatively uncomplicated and inexpensive to manufacture.
  • this general object is achieved by providing a brush handle of the kind specified in the introduction, having a brush shaft insertion opening provided in a free end of one of the handle portions, in which one or more supports are also provided for supporting part or parts of the shaft before and during the locking together of the handle portions.
  • a first support for the brush shaft is formed by the insertion opening which in turn is in the shape of a through-bore formed in an enlarged head at the free end of the handle portion.
  • Yet another embodiment of the invention suggests the provision of a further support for the brush shaft in a position inwardly of the enlarged head, with respect to the longitudinal extension of said handle portion, for positively retaining the brush shaft in the handle portion before and during the interconnection of the handle portions.
  • Another object of the invention is to provide means for achieving excellent locking of the brush shaft to the handle in the condition ready for use, i.e. in the folded and interlocked condition of the two handle portions.
  • this further object is achieved by providing means for positively locking the brush shaft to the handle in the interconnected condition of the handle portions, and more specifically by providing a protrusion on one of the handle portions, said protrusion serving to bend a part of the brush shaft into a cavity in the other handle portion.
  • the brush handle is used specifically for supporting and holding interdental brushes for oral use.
  • the brush handle 1 has a generally elongate shape suitable for being gripped with the fingers of one hand when in its is in its later described, folded condition. It consists of two handle portions 2 and 3 being connected to each other at one of their ends 2b and 3b, respectively.
  • the connection 13 between the two handle portions 2, 3 is formed by a so called living handle of the kind employed for the handles of U.S. Patent No. 5 758 382 and European Patent no. 0 403 494 B1, namely a relatively thin membrane formed by a weakening of the material of the handle.
  • the invention is not restricted to using such a living joint. Any kind of joint permitting folding of the two handle portions towards each other could be employed, such as a hinge type of joint.
  • the outer edges of the handle portions are preferably rounded (not specifically shown in the drawings). Forming recessed areas 21 and 23 in the outer surface of the handle portions 2,3 provides an even further improved and comfortable grip for the fingers.
  • the free end 2a of a first one of the handle portions 2 is provided with an enlarged head 4 having an outwardly, i.e. towards the free end of the handle portion 2, generally tapering shape.
  • a seat 12 is formed in an inner end face 4b of said enlarged head 4 facing towards the folding joint 13.
  • the enlarged head 4 of the first handle portion 2 is furthermore provided with a centrally located through-bore 5 serving as an insertion opening for the brush 17 which will be described below in connection with drawing figures 4 and 5.
  • the through-bore 5 extends from an outer end face 4a of the enlarged head 4 and to the above mentioned inner end face 4b thereof.
  • the inner wall 5a of the bore 5 is generally cylindrical, except for the outer end portion 5b thereof, which has an outwardly widening shape and ends in a relatively wide mouth opening in the end face 4a. This design has the purpose of increasing the effectiveness of the cleaning action of the brush 17 by allowing the brush portion 18 of the brush to be more flexible.
  • the bore 5 continues in a groove 15 provided in an edge of the handle portion and cooperating with a corresponding groove 11 formed in the latch 10 of the second handle portion 3.
  • the inner wall 5a of the through-bore serves as a first support for the shaft or stem 19 of the brush 17.
  • the length of the enlarged head 4 and consequently of the bore 5 should be chosen so as to provide the appropriate support for the shaft 19 of the brush 17. The actual length thereof may vary for different types of brushes.
  • an additional support 16 is formed in said first handle portion 2, at a position inwardly of the enlarged head 4 with respect to the longitudinal extension of said handle portion 2.
  • the additional support 16 is provided for positively retaining the brush shaft 19 in the handle 2 prior to folding the handle portions 2, 3 together.
  • said positively retaining additional support 16 consists of two projections 6,7 generally positioned so as to straddle the longitudinal center line C of the handle 1.
  • the two projections 6, 7 are provided adjacent each other and spaced apart for forming a shaft receiving passage 20 (see fig. 3) therebetween, said shaft receiving passage 20 being generally aligned with the insertion opening 5 in the enlarged head 4.
  • the shaft receiving passage 20 is formed by facing side surfaces of the projections 6, 7. Said facing side surfaces of the projections 6, 7 form a sharp angle between them, pointing in a direction away from the enlarged head 4 and thereby form a passage 20 narrowing in the later described shaft insertion direction A.
  • the projections 6, 7 are formed from a resilient material allowing widening of the passage by the insertion of the shaft 19 of the brush 17 therebetween, whereby the additional support 16 resiliently locks the brush to said one handle portion 2 during folding and locking of the two handle portions 2, 3.
  • a shaft locking protrusion 9 is provided at the free end 3a of the second handle portion 3, said protrusion 9 serving the purpose of lockingly engaging the shaft 19 of the brush 17 when said handle portions 2, 3 are brought to their interconnected condition with the shaft inserted between them.
  • said shaft locking protrusion 9 projects into a receiving cavity 2c (fig. 4) in the first handle portion 2 with the purpose of engaging the shaft 19 to bend it and likewise force it into the cavity 2c.
  • the handle portions are in the illustrated embodiment provided with an inner cavity extending almost between their first and second ends, but it should be emphasized that for the function of the shaft support and locking means it would be sufficient to provide a cavity only in the first handle portion 2, extending from the enlarged head 4 to approximately the centre of the projections 6, 7.
  • two jaws 8 separated by a groove 14 may be provided at the first free end 3a of the second handle portion 3, said jaws forming a clamp intended to engage the projections 6, 7 in the interconnected condition of the handle portions 2, 3.
  • the purpose of the clamps 8 is to press the projections together for additionally locking the shaft 19 that has been inserted therebetween.
  • the handle 1 is used with a twisted wire brush of the bottle brush type, which are commonly used as interdental brushes for oral use. It should be emphasized, however, that in its basic design the handle of the invention may, with only small modifications, be used for other types of brushes having an elongate shaft or stem, such as pencil brushes used for applying cosmetic products.
  • the brush 17, having a brush portion 18 with bristles and a twisted wire shaft portion 19, is installed in the handle 1 by introducing the shaft 19 into the bore 5 from the side of the outer end face 4a.
  • the handle need not be held in a straight or unfolded position corresponding to fig. 4 when the brush is introduced. Instead, the handle portions 2, 3 may be kept in an optional folded position, as long as the shaft locking protrusion 9 and the two jaws 8 do not interfere with the insertion of the brush shaft 19. Consequently, it will not be necessary to open the handle fully when exchanging the brush 17.
  • the brush shaft 19 is pushed further into the enlarged head 4 in the direction A (fig. 3). Eventually its free end reaches the area of the inner cavity 22 of the first handle portion 2 and enters the shaft receiving passage 20 formed between the projections 6, 7. Up to this point the shaft is reliably supported by the inner wall 5a of the bore 5, completely surrounding the shaft over an essential portion of its length, and to some extent also by the groove 15. Should this support for some reason not be sufficient for holding the brush 17 in place, the inventive design, with the insertion opening positioned in the free end of one handle portion instead of in the area of the folding joint, permits the user to support the brush with his hand holding said first handle portion 2. This feature considerably facilitates handling of the brush handle during installation of the brush.
  • the shaft contacts the inner surfaces of the projections 6, 7 and pushes them apart. Due to the resiliency of the projections 6, 7 they will clamp the brush shaft 19 sufficiently to prevent it from falling out of the handle 1 irrespective of how the handle is turned and manipulated.
  • Another advantageous effect of said clamping action is that it facilitates adjusting the brush to the longitudinal position suitable for each user. Such adjustments are much easier to perform and maintain if the shaft is subjected to a biasing force than if it could move freely in the longitudinal direction.
  • the second handle portion 3 With the brush 17 in position the second handle portion 3 is folded all the way into engagement with the first handle portion 2, i.e. so that the latch 10 engages the seat 12 of the enlarged head and locks the second handle portion 3 securely to the first handle portion 2.
  • the introduction of the latch 10 into the seat 12 is accomplished through a combination of the slanted outer surface of the latch 10 and the resiliency of the material of the handle, said material preferably being a plastic material suitable for injection molding.
  • the shaft locking protrusion 9 engages the brush shaft 19 and bends the shaft 19 down into the cavity 22, as is illustrated in fig. 5.
  • This bending down of the shaft produces a firm positive locking of the shaft 19 to the handle 1, said locking action being further increased by the fact that the shaft is simultaneously pushed down toward the bases of the projections 6, 7 which extend upwardly from the bottom of the cavity 22.
  • the flexibility of the projections decreases towards their base so that their clamping action against the shaft increases as the latter is pushed down in the described manner.
  • the jaws 8 likewise serve to enhance the grip of the projections 6, 7 on the shaft, since they apply an increasing inwardly directed pressure against the projections 6, 7 as the folding action is completed.
  • the latch 10 When the brush 17 is to be replaced the latch 10 is disengaged from the seat 12 by slightly bending down the free ends of the folded handle 1 until the latch 10 snaps out, this likewise being possible due to the resiliency of the material. Finally the handle portions are unfolded at least until the protrusion 9 has left the cavity 22 and the jaws 8 have released the projections 6, 7. Subsequently the old brush 17 is pulled out from the first handle portion 2, during which the pliable shaft 19 straightens out so as to pass through the bore 5.
  • the provision of the insertion opening 5 at a free end of one of the handle portions 2, 3 instead of in the area of the folding joint 13 greatly facilitates the installation of the brush 17 in the manner described above, produces effective support for the brush shaft 19 during installation and secure locking of the brush 17 to the handle 1 in the folded condition.
  • the brush 17 With the addition of the second support 16 the brush 17 will be retained so securely in the handle 1 that it may be held in any position, and may even be put down temporarily without any danger of the brush falling out of the handle or even being displaced therein.
  • the handle may consist of two separate handle portions being provided with cooperating connectors of any conventional type adjacent their second ends 2b, 3b, in addition to the seat and latch respectively of their first ends.
  • the invention is not restricted to the use of the jaws 8 of the second handle portion 3, which are optional.
  • the first support in the enlarged head does not need to be a through-bore enclosing the shaft around its entire circumference and along the full length of the support.
  • the first support could be partly or entirely formed as an upwardly open groove receiving the brush shaft.
  • the support must not be positioned with its support surface coinciding with or even being parallel with the center line of the handle.

Landscapes

  • Brushes (AREA)

Claims (13)

  1. Bürstenhalter (1) zur lösbaren Aufnahme einer Bürste (17) mit einem Bürstenabschnitt (18) an einem Ende und einem Schaftabschnitt (19) an dem anderen Ende, wobei der Halter aus zwei miteinander verbindbaren, im allgemeinen verlängerten Halterabschnitten (2, 3) gebildet wird, welche geeignet sind, den Schaftabschnitt zwischen den Halterabschnitten in einem miteinander verbundenen Zustand festklemmend aufzunehmen, wobei der Halter eine Einführöffnung (5) zum Einführen des Schaftabschnittes (19) zwischen die Halterabschnitte in eine übliche Schafteinführungsrichtung (A) aufweist, dadurch gekennzeichnet, dass die Einführöffnung (5) in einem ersten (2) der Halterabschnitte (2, 3) angrenzend an ein erstes freies Ende (2a) vorgesehen ist und dass angrenzend an das erste freie Ende des ersten Halterabschnittes (2) dieser mit zumindest einer Stütze (5a, 16) zum Stützen eines Teils oder Teilen des Schaftes (19) vor und während des Verschließens der Halterabschnitte (2, 3) ausgestattet ist.
  2. Bürstenhalter nach Anspruch 1, dadurch gekennzeichnet, dass der erste Halterabschnitt (2) an seinem ersten Ende (2a) mit einem vergrößerten Kopf (4) ausgebildet ist, dass die Einführöffnung (5) durch den vergrößerten Kopf (4) hindurch ausgebildet ist und sich im Allgemeinen in Längsrichtung des Halterabschnittes erstreckt und dass eine erste Stütze (5a) durch die Öffnung (5) gebildet wird.
  3. Bürstenhalter nach Anspruch 2, dadurch gekennzeichnet, dass die Einführöffnung (5) durch eine Durchbohrung (5) gebildet wird, welche sich durch den vergrößerten Kopf (4) von einer äußeren Endfläche (4a) zu einer inneren Endfläche (4b) erstreckt, wobei die innere Wand (5a) der Durchbohrung (5) die erste Stütze (5a) bildet.
  4. Bürstenhalter nach Anspruch 2 oder 3, dadurch gekennzeichnet, dass an dem einen Halterabschnitt (2) eine zusätzliche Stütze (16) an einer Stelle mit Bezug zu der Längserstreckung des Halterabschnittes einwärts des vergrößerten Kopfes (4) gebildet ist, und dass die zusätzliche Stütze (16) den Bürstenschaft (19) vor dem Zusammenfalten der Halterabschnitte (2, 3) unterstützend festklemmt.
  5. Bürstenhalter nach Anspruch 4, dadurch gekennzeichnet, dass die zusätzliche Stütze (16) durch zwei Vorsprünge (6, 7) gebildet wird, die aneinander angrenzend mit Abstand zueinander angeordnet sind, um dazwischen einen den Schaft (19) aufnehmenden Durchgang (20) zu bilden, wobei der Durchgang (20) im Allgemeinen entlang der Einführungsrichtung (A) des Schaftes und mit der Einführungsöffnung (5) in dem vergrößerten Kopf (4) ausgerichtet ist.
  6. Bürstenhalter nach Anspruch 5, dadurch gekennzeichnet, dass zumindest Teile des den Schaft (19) aufnehmenden Durchgangs (20) enger sind als die äußeren Abmessungen des Schaftes (19) und dass die Vorsprünge (6, 7) aus einem elastischen Material ausgebildet sind, welche die Aufweitung des Durchgangs beim Einführen des Bürstenschaftes (19) dazwischen ermöglichen, wobei die zusätzliche Stütze (16) die Bürste elastisch an dem einen Halterabschnitt (2) während der Verbindung der beiden Halterabschnitte (2, 3) festklemmt.
  7. Bürstenhalter nach Anspruch 6, dadurch gekennzeichnet, dass der den Schaft (19) aufnehmende Durchgang (20) von aus sich gegenüberliegenden Seitenflächen der Vorsprünge (6, 7) gebildet wird und dass die sich gegenüberliegenden Seitenflächen der Vorsprünge einen spitzen Winkel bilden, der in Richtung weg von dem vergrößerten Kopf (4) zeigt, so dass der den Schaft aufnehmende Durchgang sich in Einführungsrichtung (A) des Schaftes verengt.
  8. Bürstenhalter nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass ein den Schaft (19) klemmender Vorsprung (9) an einem ersten freien Ende (3a) des anderen Halterabschnittes (3) vorgesehen ist, dass der Vorsprung (9) mit dem Schaft (19) der Bürste (17) klemmend in Eingriff steht, wenn sich die Halterabschnitte (2, 3) in ihrem miteinander verbundenen Zustand befinden, und der Schaft zwischen Ihnen eingeführt ist.
  9. Bürstenhalter nach Anspruch 8 zur Verwendung mit einer Bürste (17), welche einen biegsamen Schaft (19) aufweist, dadurch gekennzeichnet, dass der den Schaft (19) klemmende Vorsprung (9) in miteinander verbundenem Zustand der Halterabschnitte (2, 3) sich in eine Aufnahmevertiefung (2c) in dem ersten Halterabschnitt (2) erstreckt und in den Schaft (19) eingreift, um ihn zu biegen und gleichfalls in die Vertiefung (2c) zu zwingen.
  10. Bürstenhalter nach einem der Ansprüche 5 - 9, dadurch gekennzeichnet, dass eine Klemmvorrichtung (8) an einem ersten freien Ende (3a) an dem anderen Halterabschnitt (3) vorgesehen ist, dass die Klemmvorrichtung (8) die Vorsprünge (6, 7) in dem miteinander verbundenen Zustand der beiden Halterabschnitte (2, 3) spreizt, wodurch die Vorsprünge zur weiteren Festklemmung des zwischen den Vorsprüngen eingeführten Schaftes (19) zusammengeklemmt werden.
  11. Bürstenhalter nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die Halterabschnitte (2, 3) an einem zweiten Ende (2b bzw. 3b) dieser dauerhaft durch ein Faltgelenk (13) miteinander verbunden sind, und dass miteinander zusammenwirkende Verbinder (10, 12) angrenzend an ihren ersten Enden (2a, 3a) zur sicheren Festklemmung der Halterabschnitte in dem eingeklappten Zustand vorgesehen sind.
  12. Bürstenhalter nach einem der Ansprüche 1 - 10, dadurch gekennzeichnet, dass der Halter (1) aus zwei separaten Halterabschnitten (2, 3) besteht, welche zumindest angrenzend an ihren ersten und zweiten Enden (2a, 3a und 2b, 3b) mit zusammenwirkenden Verbindern (10, 12) versehen sind
  13. Verwendung eines Bürstenhalters (1) gemäß einem der Ansprüche 1 - 12 zur lösbaren Halterung einer Interdentalbürste (17) zur oralen Verwendung.
EP19990108258 1999-04-27 1999-04-27 Bürstengriff Expired - Lifetime EP1048244B1 (de)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP19990108258 EP1048244B1 (de) 1999-04-27 1999-04-27 Bürstengriff
DE69909050T DE69909050T2 (de) 1999-04-27 1999-04-27 Bürstengriff

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP19990108258 EP1048244B1 (de) 1999-04-27 1999-04-27 Bürstengriff

Publications (2)

Publication Number Publication Date
EP1048244A1 EP1048244A1 (de) 2000-11-02
EP1048244B1 true EP1048244B1 (de) 2003-06-25

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP19990108258 Expired - Lifetime EP1048244B1 (de) 1999-04-27 1999-04-27 Bürstengriff

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EP (1) EP1048244B1 (de)
DE (1) DE69909050T2 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
USD816999S1 (en) 2017-03-06 2018-05-08 Ranir, Llc Toothbrush

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4030199A (en) * 1975-05-12 1977-06-21 E-Z Floss Handle for disposable appliance
US4780923A (en) * 1987-11-30 1988-11-01 The Gillette Company Interproximal brush device having hinged brush retainer cap
SE460172B (sv) 1988-02-02 1989-09-18 Lars Erik Thuresson Handtag foer utbytbara borstar, i synnerhet interproximaltandborstar
GB9118147D0 (en) 1991-08-22 1991-10-09 Westone Prod Ltd Interdental brush holder
US5377377A (en) * 1993-03-23 1995-01-03 Gillette Canada Inc. Interproximal brush
US5758382A (en) 1995-09-12 1998-06-02 John O. Butler Company, Inc. Interdental brush handle
DE29601661U1 (de) * 1996-02-01 1996-03-28 Geka Brush Georg Karl Gmbh Interdental-Reinigungsgerät

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
USD816999S1 (en) 2017-03-06 2018-05-08 Ranir, Llc Toothbrush

Also Published As

Publication number Publication date
DE69909050T2 (de) 2004-04-29
EP1048244A1 (de) 2000-11-02
DE69909050D1 (de) 2003-07-31

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