Balancing weights with ferromagnetic inlay.

(54) Title: COUNTERWEIGHTS WITH INCRUSTATION FERROMAG NETICA.

(54) Title: BALANCING WEIGHTS WITH FERROMAGNETIC INLAY.

(57) Summary

A counterweight (90) for balancing a vehicle wheel has a body (92) of non-ferromagnetic material, which provides the largest portion of the mass of the counterweight, and a ferromagnetic inlay (95) to support the counterweight (90) through a magnetic force. The ferromagnetic inlay (95) provides a smaller portion of the mass of the counterweight. A weight applicator (80) has a magnet (82) to interact with the ferromagnetic inlay (95) of the counterweight (90) and support the counterweight (90).

(57) Abstract

A balancing weight (90) for balancing a wheel of a vehicle has a body (92) of non-ferromagnetic material providing a major portion of the balancing weight's mass and a ferromagnetic inlay (95) for holding the balancing weight (90) by magnetic I forced. The ferromagnetic inlay (95) provides a minor portion of the balancing weight's mass. A weight applicator (80) has a magnet (82) for interacting with the ferromagnetic inlay (95) of the balancing weight (90) and holding the balancing weight (90).

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PATENT TITLE No. 348703

WEGMANN AUTOMOTIVE GMBH &amp; CO. KG

Rudolf-Diesel-Strasse 6, 97209, Veitshóchheim, GERMANY

COUNTERWEIGHTS WITH FERROMAGNETIC INCRUSTATION.

CIP:

CPC:

B25J15 / 06; F16F15 / 32; F16F15 / 34; G01M1 / 32 B25J15 / 0608; F16F15 / 324; F16F15 / 345; F16F2222 / 06

MARKUSVQGLER

REQUEST

Number:

MX / a / 2015/014262

International Presentation Date:

April 2014

Country: EP

PRIORITY

Date:

April 2013

Number:

13163600.3

Validity: Twenty years

Expiration Date: April 11, 2034

Issue Date: June 23, 2017

The reference patent is granted on the basis of articles 1^or, 2 "fraction V, 6" useful fraction, and 69 of the Industrial Property Law.

In accordance with the article® of the Industrial Property Law, this patent has a validity of twenty years, non-extendable, counted from the filing date of the international application and will be subject to the payment of the fee to keep the rights in force. .

Whoever subscribes this title does so based on the provisions of articles 6, fractions III and 7^or bis 2 of the Industrial Property Law (Official Gazette of the Federation (D OF) 06/27/1991, amended on 08/02/1994, 10/25/1996, 12/26/1997, 05/17/1999 , 01/26/2004, 06/16/2005. 01/25/2006, 05/06/2009, 06/01/2010, 06/18/2010, 06/28/2010, 01/27/2012 and 09 / 04/2012); items 1^or, 3 »fraction V section a), 4 ° and 12» sections I and III of the Regulations of the Mexican Institute of Industrial Property (DOF 12/14/1999, amended on 07/01/2002. 07/15/2004, 07/28/2004 and 09/07/2007); Articles 1, 3 ", 4, 5 ° section V subsection a), 16 sections l and ID and 30 of the Organic Statute of the Mexican Institute of Industrial Property (DOF 12/27/1999, amended 10/10/2002, 07/29/2004, 08/04/2004 and 09/13/2007); 1 », 3 'and 5» subsection a) of the Agreement that delegates powers to the Deputy General Directors, Coordinator, Divisional Directors, Titutors of ...... the Regional Offices Divisional Subdirectors, Departmental Coordinators and other subordinates of the Mexican Institute of the In®astnal Property. (DOF 12/15/1999, amended on 02/04/2000, 07/29/2004, 08/04/2004 and 09/13/2007). '

This document is signed with an advanced electronic signature (FIEL), based on articles 7 BIS 2 of the Industrial Property Law; 3 of its Regulations, and 1 fraction lll, 2 fraction V, 26 BIS and 26 TER of the Agreement establishing the guidelines for the use of the Payment and Electronic Services Portal (PASE) of the Mexican Institute of Industrial Property, in the procedures indicated.

<td></td><td>THE DIVISIONAL DIRECTOR OF PATENTS</td>

<td></td><td>NAHANNY CANAL REYES</td>

<td></td><td rowspan="2">Original string: jg NAHANNY MARISOL CANAL REYES | 00001000000403252793 | Administration Service jgQ Tributaria | 1695 || MX / 2017/50385 | MX / a / 2015/014262 | PCT patent title | 1027 | RGZ | Page (s) 1 | R4MkoNM / ndvrk0mhCkbSLNr12lk =</td>

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<td></td><td>Digital stamp:</td>

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Arenal No

J. Floor 1, Santa María Pepepán Town, Xochimilco. 16020,

MX / 2017/50385

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Field of the invention

The invention relates to counterweights, which can be operated by an automatic handling system and which can be attached to the rim of a vehicle wheel for wheel balancing. The invention also relates to a counterweight applicator, which can be part of an automatic handling system, for handling counterweights. The invention further relates to a method for the automatic handling of counterweights.

Description of related techniques

Hook weights, as described in US Patent 4,728,154, have a metal body that provides mass and a hook to hold the weight on a wheel rim.

US Patent 7,478,659 B2 describes a pressurizing weight patch for wheels. The pressurizer has two pressure blocks to press counterweights to a single wheel tire. The counterweights are manually applied by an operator in a first step and are firmly pressed to the tire by the pressurizer in a second step. IMrl

MEXICAN INSTITUTE

DEM MYOPIETY

United States Patent 8.18 ^^ 09 ü-zF— describes a weight applicator for a εί □ piin_?r₉r · - weight has an outer arcuate surface to support the counterweight to be attached to the wheel by means of an adhesive. For this purpose, counterweights with adhesives on opposite sides are required.

A dispensing device for counterweights and a method for dispensing counterweights are described in WO 2013/034399 Al. Herein, plastic counterweight tapes with integrated steel balls are disclosed.

US 5,134,766 describes an automatic weighing machine that holds the counterweights through a ferromagnetic hook.

WO 2010/143322 Al describes a counterweight.

Summary of the invention

The problem to be solved by the invention is to improve counterweights and counterweight applicators for simplified handling of counterweights during application to a rim. Furthermore, it is desired that the counterweights can be accurately applied at a predetermined position. An additional objective J ^ s ^ rXd ^ INSTITUTO MEXICANO DE LA FHíJFIEDAD The costs of handling counterweights me ^ YaVite

<img file="MX348703B_D0004.tif" />

applicator and provide a method to make me happy¹¹ maiiu ju de counterweights.

Solutions to the problem are described in the independent claims. The dependent claims relate to further improvements of the invention.

Tests have shown that the magnetic force that can be established on a counterweight, as known in the prior art, is not sufficient to support the counterweight in a modern handling device. Due to the very short cycle times, high movement speeds and high accelerations are required. Consequently, precise location of the counterweights relative to the handling device and high clamping forces are required.

In a first embodiment, a counterweight comprises a counterweight body having an inlay of ferromagnetic material, which is preferably shaped as an elongated member. The ferromagnetic inlay has a contact surface located on one side of the body of the counterweight. This contact surface makes it possible to establish a magnetic circuit with an external magnet, which has a relatively small air gap. The term air space in this document means AnlVi pec Ao INSTITUTO MEXICANO DE LA PROPIEDAD non-magnetic material, or any material with low magnetic permeability such as air, -imposing-rrrra- comparatively high magnetic resistance. Because the contact surface is accessible, a high mechanical flux density can easily be set.

Although it is preferred to have only one contact surface, there may be two or more contact surfaces, preferably on opposite sides of the counterweight. One contact surface has proven to be sufficient. It is the best choice as it only has a low impact on the design and mechanical stability of the counterweight.

It is preferred that the counterweights are coated to provide protection against corrosion and / or to cover ferromagnetic fouling. As the thickness of two pierced coatings is in the range of a few microns, this will not or only rarely affect the magnetic flux.

In another embodiment, a counterweight has a body with at least one ferromagnetic inlay. The counterweight can have a body comprising at least one of the following materials: titanium, chromium, nickel, molybdenum, tin, zinc, tungsten, aluminum. The body can also be made of a polymer, plastic or a composite material containing mass particles of at least one of these

<img file="MX348703B_D0005.tif" />

of the body is pro materials. The purpose is a significant amount of _ _____x_ x 1 i, IIWUJIRIAl the total mass of the counterweight. Therefore, the body (excluding the irIFU'St) provides the largest portion of the total mass of the counterweight, while the inlay provides the least portion of the total mass of the counterweight. The mass of the scale is less than the mass of the body. Ferromagnetic inlay provides ferromagnetic properties and can interact with other ferromagnetic material or a magnet in an application head. The inlay comprises at least one ferromagnetic material.

Such ferromagnetic material can be an iron-based metal or any iron alloy, composition or compound. Preferably the scale has a mass of less than 50%, more preferably it is less than 20% of the total mass of the counterweight. It is further preferred that the mass of the scale is less than 10%; more preferably less than 5% of the total mass of the counterweight.

Some types of counterweights have metal hooks to hold the counterweights to a wheel rim. Often times this hook is made of iron or steel, which provides ferromagnetic properties. Using this hook to hold the counterweight does not provide high reproducibility. Instead, according to the invention, there is one of the counterweight, which inlay is separated from the garl®H5 *?^L ferromafedátiLdE Je

INSTITUTO MEXICANA D € LA PROPERTY

<img file="MX348703B_D0006.tif" />

Ferromagnetic inlay must not have any mechanical or magnetic caiHIsion to the hook. Instead, it should be placed in a position where the magnetic flux is not destroyed or deflected by the hook. More preferably, the ferromagnetic inlay is for the sole purpose of supporting the counterweight during delivery on a tire.

Although it is preferred that the ferromagnetic inlay be of a soft magnetic material, it can also be of a permanent magnetic material. It can comprise, in addition to iron, at least one of the following materials: samarium, cobalt, nickel. The ferromagnetic inlay is preferably fully integrated within a body of the counterweight. In an alternative embodiment, the ferromagnetic inlay can be inserted through or into a cutout in the body of the counterweight. The cut can be a press hole, drilled or molded into the counterweight. In a further embodiment, there may be a diamagnetic material such as a plastic or a gas such as air or nitrogen near the ferromagnetic inlay, to control the magnetic flux through the ferromagnetic inlay. The ferromagnetic inlay of the counterweight can be kept inside adhesive, a glue,

<img file="MX348703B_D0007.tif" />

a plastic material, by a shape fit or by a pressure fit or a combination thereof. It is preferable that the ferromagnetic inlay is a short piece of a cylinder or rod. In an alternative embodiment, the ferromagnetic inlay can be an elongated piece of a cylinder or rod.

There may be one or a plurality of ferromagnetic inlays within the body of a counterweight. Preferably, a ferromagnetic inlay is in the center section of a counterweight. In an alternative embodiment, at least two ferromagnetic inlays are at the ends and outer sections of a counterweight, all ferromagnetic counterweights. Instead, any other number of ferromagnetic inlay.

In accordance with

In chained weights, they do not have an inlay every second or quarter, or a counterweight may have an additional embodiment, a weight application head has a magnet to hold a counterweight with a ferromagnetic inlay. The application head can have a permanent magnet or an electric magnet (electromagnet). It can have a coil through which a current can flow to generate a ferromagnetic magnetic field of a to hold the counterweight and, therefore

<img file="MX348703B_D0008.tif" />

counterweight. -

According to another embodiment, a method for handling counterweights comprises the steps of moving an application head close to a counterweight, holding the counterweight by magnetic force on the application head, moving the application head together with the counterweight to the rim and release the counterweight from the application head.

In a further embodiment, a method for handling the counterweights comprises the additional steps of activating an electrical magnet within the application head after the application head has been moved near a counterweight and deactivating the electrical magnet within the application head. application after the counterweight has been moved to the rim. Activation of the electric magnet can be done by lighting a current through the coil of the electric magnet. A deactivation of the electric magnet can be done by turning off the current.

Description of the figures

The invention will now be described by way of example, without limitation of the concept invJLTlVrQrgAn '^ IS ^^ INSTITUTO MEXICANO' DE LA reOMEDAD / in examples of modalities with reference to the f

Figure 1 shows a first. » .modality gives a counterweight, in a view of a section.

Figure 2 shows the counterweight in a sectional view from the top.

Figure 3 shows the counterweight chain in side view.

Figure 4 shows another embodiment of a counterweight that can be hooked.

Figure 5 shows a further embodiment of a hookable counterweight.

Figure 6 shows a further embodiment of a counterweight that can be hooked on without a hook.

Figure 7 shows a sectional view of a counterweight with ferromagnetic inlay.

Figure 8 shows a counterweight with an integrated ferromagnetic inlay.

Figure 9 shows a counterweight with a cutout at the bottom, which supports a ferromagnetic inlay.

Figure 10 shows a chain of sticky weights.

Figure 11 shows a single adherent counterweight.

Figure 12 shows a view 13 ^^ · ^ Χ._Μ^_{ΑΝ (}ρ

OF INDUSTRIAL PROPERTY modality of a counterweight.

Figure 13 shows an embodiment of a counterweight with a modified cutout.

Figure 14 shows an embodiment of a counterweight with a further modified cutout.

Figure 15 shows a counterweight with an elongated ferromagnetic inlay, in a top view.

Figure 16 shows a counterweight with an elongated ferromagnetic inlay, in side view.

Figure 17 shows a sticky counterweight with an integrated magnet.

Figure 18 shows an application head holding a counterweight.

Figure 19 shows an application head with an electric magnet, holding a counterweight.

Figure 20 shows a further embodiment of an application head that supports a counterweight.

Figure 21 shows a further embodiment of an application head with an electric magnet, which supports a counterweight.

In Figure 1, a first embodiment of the counterweight is shown, in a sectional view from the side.

The counterweight has a bottom side that is designed to

<img file="MX348703B_D0009.tif" />

put it in contact with a tire of a DE to be balanced. In this embodiment, the contact side has an adhesive tape 99 attached. In the case of a hookable counterweight, there would be no tape. On the side opposite the contact side there is an upper side that can be marked. In the case of a roughly rectangular counterweight there will be four other sides. The counterweight body 92 has an inlay 95 of ferromagnetic material, which is preferably shaped as an elongated member. More preferably, the inlay is approximately parallel to the contact side. Ferromagnetic inlay 95 has a contact surface 94 located on one side of the body of the counterweight. This contact surface makes it possible to establish a magnetic circuit with an external magnet, which has a relatively small air gap.

In Figure 2, the above embodiment is shown in a further sectional view from above.

In figure 3, a plurality of counterweights are shown, which are forming a chain or belt. The counterweights are attached to a common adhesive tape 99. Prior to mounting, a required number of counterweights can be cut or detached from the belt, keeping their section of the adhesive tape. Here, the inlays

<img file="MX348703B_D0010.tif" />

ferromagnetic 95 can still be seen. FROM THE MOM £ L&gt; AI&gt; INDUSTRIAL counterweights are coated to provide protection against corrosion and / or to cover ferromagnetic fouling. As the thickness of two pierced coatings is in the range of a few microns, this will not or only rarely affect the magnetic flux.

In Figure 4, an embodiment of a hookable counterweight is shown. The counterweight 10 has a body comprising a central section 13, a first lateral flange 11 and a second lateral flange 12. A hook 16 for fixing the counterweight to the rim of a wheel is attached to the central section 13 of the counterweight. Preferably, the hook 16 is integrated into the central section 13. To support the counterweight through an applicator, a first ferromagnetic inlay 14 and a second ferromagnetic inlay 15 are provided. Preferably, these ferromagnetic inlays comprise a ferromagnetic material such as iron, steel, or even a plastic with embedded ferromagnetic particles. The ferromagnetic inlays shown herein can face the upper surface, as shown in the figure, which improves the magnetic force to a weight magnetic applicator. Alternatively, the ferromagnetic inlays may also be material by weight, or any other INDUSTRIAL material such as a dye, a protective film or any other coating. By using two or more ferromagnetic inlays, the position of the counterweight relative to an application head can be precisely defined. There may be additional means to mechanically guide the stabilization of the counterweight.

In Figure 5, a further embodiment of a hookable counterweight 10 is shown. Here, only a first ferromagnetic inlay 14 is provided, preferably in the center of the counterweight. To avoid unwanted effects, the ferromagnetic inlay must be separated, preferably magnetically separated by the hook 16, if the hook has ferromagnetic properties. If a plastic hook is used, such separation is not necessary.

In Figure 6, a hookable counterweight 20 is shown without a hook. Here, the counterweight shown is similar to the counterweights shown above. The main difference is that no hook is provided. During the process of mounting the counterweight to the rim, a separate hook is pushed over the counterweight and rim to secure the counterweight

<img file="MX348703B_D0011.tif" />

to the rim. To hold the hook, it is slotted 21, preferably in the center of the

<img file="MX348703B_D0012.tif" />

Again, a first ferromagnetic inlay 14 and a second ferromagnetic inlay are provided

fifteen. Although it is preferable to have a symmetrical arrangement with two ferromagnetic inlays, a single ferromagnetic inlay will work.

In figure 7, a view of a section of a counterweight 20 is shown, according to any of the previous embodiments. There may be a first cut 25 on top of the counterweight in which a second ferromagnetic inlay 15 is placed. The cut 25 may be fabricated during the molding of the counterweight 20, it may be press fit into the counterweight, or it may be drilled or manufactured by any other suitable shape on the counterweight 20. It may have beveled or rounded edges to simplify insertion of the ferromagnetic inlay 15. There may be a similar cutout for a first ferromagnetic inlay and / or any additional ferromagnetic inlay.

In Figure 8, an additional counterweight 30 with integrated ferromagnetic inlay 15 is shown. This ferromagnetic inlay can be molded into the body of the counterweight.

In Figure 9, a counterweight 40 is shown with

I .Μ Ρ I a cut 45 at the bottom. In^Γ LAWrWijxc / Vx 'ndustrial supports a ferromagnetic inlay. The cutout can be manufactured as described above and the counterweight can be covered as described above.

In FIG. 10, a chain 50 of self-adhering weights is shown. The counterweights 51, 52 and 53 are preferably chained together, for example by a common self-adhesive tape under the counterweights or by a metal connection between the counterweights. There may be a long chain of counterweights from which pieces of required length can be cut. Each of these counterweights preferably has a ferromagnetic inlay 54, 55 and 56. There may also be chained weight segments, for example, comprising a piece of three counterweights 51, 52 and 53 fixedly connected to each other. In such a case, the use of ferromagnetic inlays in only one or two of the counterweights is preferred. For example, a single magnetic inlay can be used on the center weight 52 of the three adjacent weights, or any other number of adjacent weights. In an alternative embodiment, two ferromagnetic inlays can be used on the outermost counterweights of a chain of counterweights. These can be counterweights 51 and 53 in this mode.

IMPI ^

In Figure 11, it is shown "." ^ 9 t

INDUSTRIAL adherent 60 unique. At its center is a 65 ferromagnetic inlay. There may also be any other number of ferromagnetic inlays in this counterweight.

In Figure 12, a further embodiment of a counterweight 60 is shown. Here, the ferromagnetic inlay is positioned on the underside of the counterweight, which is close to the rim. A self-adhesive tape 69 may be provided to hold the counterweight 60 to the rim. The ferromagnetic inlay 65 is positioned within a cutout 64. Between the ferromagnetic inlay and the body of the counterweight 60 there may be a gap 66. In the most preferred embodiment, the ferromagnetic inlay is held within the cut by adhesive tape 69. In another embodiment, there is a filler, such as glue or cement, within space 66 to further hold the ferromagnetic inlay within the body of counterweight 60. It is further preferred that the space contains at least one ferromagnetic material. Such ferromagnetic material can be air, plastic, or a similar material. Having at least a small amount of ferromagnetic material in series with the ferromagnetic inlay will result in a well-determined magnetic flux and therefore excessive clamping forces between

<img file="MX348703B_D0013.tif" />

IMPI the counterweights and an applicator head to prevent the counterweight from sticking to an applicator head.

In Fig. 13, a further adherent counterweight 60 is shown with a modified cutout 64. Here, the cutout preferably has a conical shape, in which the ferromagnetic inlay, which preferably also has a tailored conical shape, is pressed. This results in a shape fit between the ferromagnetic inlay and the adherent counterweight body. Also, there may be a gap 66 here. Preferably, the thickness of the gap is between 3mm and 0.1mm. More preferably, the thickness is between 0.5mm and 0.1mm.

In FIG. 14, a further adherent counterweight 60 is shown with a modified cutout 64 in the shape of an inverted cone. Preferably it is held by press fit.

In FIG. 15, a self-adhering counterweight 70 with an elongated ferromagnetic inlay 75 is shown from a top view.

In Figure 16, a self-adhering counterweight 70 is shown. This counterweight contains an elongated ferromagnetic inlay 75. This inlay may be in the form of a cylindrical rod. The ferromagnetic inlay can be mounted from either the top side or the bottom side, similar to the industrial one shown above. More preferably, it is integrated into the body of the counterweight. Preferably, there is an adhesive tape 79 to hold the counterweight on the rim.

In Figure 17, a counterweight 71 with an integrated magnet 76 is shown. The magnet can be mounted from the top side or from the bottom side, similar to the embodiments shown above. More preferably, it is embedded in the body of the counterweight. The letters N and S denote the north pole and the south pole of the magnet. These can be changed at your address.

In FIG. 18, an application head 80 is shown supporting a counterweight 91. The application head has a body 81 that supports a magnet 82. A permanent magnet is shown here. Instead a magnetic coil can be used. The magnetic field generated by the magnet 82 in the application head generates a magnetic flux 83 that penetrates the elongated ferromagnetic inlay 95 in the counterweight 91. The magnetic flux is guided by an armature 84. Due to this magnetic flux, the ferromagnetic inlay 75 and thus the counterweight 91 are held in the application head 80. There may be more mechanical attachment means 89 to hold

IMPI ^ mechanically the counterweight in a position^m^^^ j ^! ^ 5gnj ^^^ í

INDUSTRIAL relative to the application head so that the counterweight cannot rotate or tilt when supported by the application head. Depending on or in conjunction with the attachment means 89, the orientation of the counterweight relative to the application head can be determined by the direction of the magnetic flux. The magnetic flux displayed in this embodiment will try to force the elongated ferromagnetic inlay parallel to magnet 82. Therefore, there will always be a clear determined orientation of the counterweight.

In FIG. 19, an application head 80 is shown having an electric magnet. The electric magnet preferably has a coil 86 that comprises a plurality of windings. Preferably, the windings are supported by a form of coil 85. For better flow control, it is preferred to have armature 84 within the coil. Preferably, the armature extends to the sides of the counterweight, as in the previous figure. In this case, the previous permanent magnet is replaced by a coil with an inner armature part. The magnetic flux 83 is similar to the magnetic flux generated by a permanent magnet, as shown in the previous figure. The magnetic force can be controlled by controlling a current flowing at

IMPI »across the coil. Consequently, the 1NDU.STRÍAL can be increased or decreased. For example, a relatively high magnetic force can be used to lift the counterweight; During transportation, the magnetic force may be reduced; Once the counterweight has been applied to the rim, to release the counterweight from the application head, the magnetic force can be set to zero.

In Figure 20, a further embodiment of an application head 80 is shown for supporting a counterweight 60, as described above. If there is only a small, non-elongated ferromagnetic inlay, it is preferred to change the orientation of the magnet 82 toward the ferromagnetic inlay, as shown. Consequently, magnetic flux 83 differs in orientation compared to previous embodiments. If there is a plurality of ferromagnetic inlays, a plurality of magnets can be used.

In FIG. 21, an embodiment of an application head 80 with an electric magnet to support a counterweight 60 is shown. The electric magnet may have a winding 86 supported by a coil form 85 and be centered through an armature 84. The magnetic flux 83 is similar to the magnetic flux of the modality

IMPI

In figure 22, a previous modality is shown

INSTITUTO MEXICANO OE LA PROPERTY INDUSTRIAL preferred application head 80 with an electric magnet to support a counterweight 90. The electric magnet may have at least one winding 86 supported by a coil form 85 and be centered through armature 84. Magnetic flux 83 travels from the armature into the ferromagnetic inlay and exits the ferromagnetic inlay via contact surface 94 in armature 84.

List of reference numbers hookable counterweight first side wing second side wing center section first ferromagnetic inlay second ferromagnetic inlay hook.

clip-on counterweight slot cutter clip-on counterweight clip-on counterweight

<td> 40</td><td>_t IMPIg ^ runs institutomrxicani; OF THE PROPERTY INDUSTRIAL</td>

<td> 50</td><td>chain of adherent counterweights</td>

51, 52, 53 adherent weights

<td> 54,</td><td>55, 56 ferromagnetic inlay</td>

<td> 60</td><td>adherent counterweight</td>

<td> 64</td><td>cut</td>

<td> 65</td><td>ferromagnetic inlay</td>

<td> 6 6</td><td>space</td>

<td> 69</td><td>Scotch tape</td>

<td> 70</td><td>adherent counterweight</td>

<td> 71</td><td>adherent counterweight</td>

<td> 75</td><td>elongated ferromagnetic inlay</td>

<td> 76</td><td>magnet</td>

<td> 79</td><td>Scotch tape</td>