Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B43—WRITING OR DRAWING IMPLEMENTS; BUREAU ACCESSORIES
  • B43K—IMPLEMENTS FOR WRITING OR DRAWING
  • B43K23/00—Holders or connectors for writing implements; Means for protecting the writing-points
  • B43K23/08—Protecting means, e.g. caps
  • B43K23/10—Protecting means, e.g. caps for pencils
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B43—WRITING OR DRAWING IMPLEMENTS; BUREAU ACCESSORIES
  • B43K—IMPLEMENTS FOR WRITING OR DRAWING
  • B43K25/00—Attaching writing implements to wearing apparel or objects involving constructional changes of the implements
  • B43K25/02—Clips

Definitions

• the present disclosure relates to a cap for pencil.
• these caps does not protect the cut end of a pencil while taking into account the dimensional tolerances of the rods, in particular pencils obtained by a material coextrusion process.
• the cap may not sufficiently tighten the pencil and detach in an undesired manner and / or when the diameter of the pencil is in the upper limit tolerances, the pencil may not be inserted into the cap.
• the present disclosure aims to remedy at least in part these drawbacks.
• the present disclosure relates to a pencil cap comprising an insertion opening configured to receive one end of the pencil, at least two internal retaining ribs angularly distributed uniformly about a central axis of the cap, disposed proximate the insertion opening and configured to cooperate with an uncut portion of the pencil and a stop surface configured to cooperate with a cut end of the pencil.
• Internal ribs that is to say ribs carried by the inner surface of the cap, allow a point contact between the pencil and the cap, when the cap cooperates with the pencil, that is to say when the pencil is inserted into the cap.
• the contact between the cap and the pencil is thus achieved by means of the internal ribs which cooperates with an uncut portion of the pencil. It is understood that the contact between the cap and the pencil is not realized, in a plane perpendicular to the axial direction, by cooperation of a continuous line carried by the inner surface of the cap and a continuous line of an outer surface of the pencil but by local cooperation of the inner ribs with the outer surface of the pencil.
• the internal ribs therefore allow greater deformation of the cap. It is possible to take into account the tolerances of manufacture of the pencil, that is to say the variations of the diameter of the pencil, while guaranteeing that when the pencil diameter is in the low limit of the tolerances, the cap sufficiently tightens the pencil. and does not come off unwantedly and when the diameter of the pencil is in the upper limit of tolerances, the pencil can be introduced into the cap.
• an uncut portion of the pencil cooperates with the internal ribs so that the pencil is held in the cap.
• the pencil is thus retained in the cap.
• the uncut portion of the pencil may be an uncut end of the pencil or an uncut portion of the pencil adjacent the cut end of the pencil.
• the stop surface when the cut end of the pencil is inserted into the cap, the cut portion of the pencil is stopped against the stop surface and the pencil lead can not be pressed to the bottom of the cap.
• the pencil lead is protected and does not break. Due to the internal ribs which are uniformly distributed around the central axis of the cap, a single stop surface makes it possible to ensure that the cut portion of the pencil is not damaged when it is inserted into the cap. .
• the cap comprises three internal ribs.
• the internal ribs being distributed angularly uniformly, the internal ribs are present every 120 ° in Hood.
• the presence of three internal ribs makes it possible to center a pencil in the cap while limiting the number of internal ribs.
• the cap comprises a stop configured to cooperate with an uncut end of the pencil.
• the stop allows to limit the insertion of the pencil into the cap and thus the insertion and uncoupling efforts of the pencil with the cap.
• the stop also makes it possible to limit the length in the axial direction of the portion of the cap that deforms when the pencil is inserted into the cap. This stop also limits the insertion of the uncut end of the pencil into the cap.
• the cap includes a staple.
• the cap comprises an eraser received in a rubber receiving housing.
• At least one of the inner ribs has a guide surface configured to guide the uncut portion of the pencil upon insertion into the cap, the guide surface having an angle of 10 ° +/- 0.5 ° with respect to the central axis, in a plane passing through the internal rib and the central axis of the cap.
• the guide surface makes it possible to center the pencil in the cap and to facilitate the insertion of the pencil into the cap.
• each inner rib has a guide surface.
• each inner rib has a clamping portion configured to cooperate with the portion not cut from the pencil, the clamping portion has, in a plane perpendicular to the axial direction, an inscribed diameter greater than or equal to 95% of the minimum inscribed diameter of the pencil with which the cap is configured to cooperate and less than or equal to 99% of the minimum inscribed diameter of the pencil with which the cap is configured to cooperate.
• inscribed diameter is meant the diameter of the circle inscribed with respect to the internal ribs in a plane perpendicular to the axial direction.
• the internal ribs being angularly distributed uniformly, it is possible in a plane perpendicular to the axial direction to determine the diameter of a circle inscribed in the internal ribs.
• the internal ribs in the plane perpendicular to the axial direction are arranged along radii of the circle inscribed in the internal ribs.
• the inscribed diameter of the clamping portion is thus smaller than the inscribed diameter of the pencil so that an uncut portion of the pencil is held in the cap by clamping the internal ribs, in particular the clamping portion of the internal ribs. , on the pencil.
• the inscribed diameter of the clamping portion is such that the cap may deform upon insertion of the pencil into the cap as well as during retention of the pencil in the cap.
• the diameter of the inscribed circle is the distance separating two parallel faces of the pencil.
• the diameter inscribed is the diameter of the circle.
• the clamping portion of the inner rib has a triangle shape in a plane perpendicular to the axial direction, an edge of the triangle being configured to be in contact with the pencil when the pencil is inserted into Hood.
• the triangle may have a rounded edge, the contact between the pencil and the cap being formed along this rounded edge.
• the inscribed diameter of the clamping portion is configured so that the force in the axial direction to disengage the cap of the pencil is greater than 3 N, preferably greater than 4 N and is less than 50 N, preferably less than 40 N.
• the pencil may be detached from the cap while this is not desired.
• the insertion force of the pencil into the cap becomes too high.
• the stop and the stop surface are carried by a stop rib.
• the stop rib is disposed in the extension of at least one of the internal ribs.
• the cap includes an equal number of internal ribs and stopping ribs.
• each stopper rib is disposed in the extension of an internal rib.
• the stop surface is used to stop the cut end of the pencil so that the cut end of the pencil, that is to say the pencil lead, is not damaged and that the mine of the pencil is protected while inserted into the cap.
• the slope of the stop surface makes it possible to take into account the different size angles used. Indeed, in the United States of America, the size angle is 9 ° with respect to the central axis, while in Europe, the size angle is 15 ° with respect to the central axis .
• the angle of the stop surface being 9 °, it makes it possible to ensure that the cut end of the pencil is stopped in the cap without damaging the cut end of the pencil, that is to say the pencil lead.
• the stop surface in a plane passing through the central axis of the cap and intersecting the stop surface, is arranged such that a minimum distance measured along the axial direction between any point of the stop surface and the bottom of the cap is greater than or equal to 5 mm, preferably greater than or equal to 10 mm, more preferably greater than or equal to 15 mm.
• the x coordinate represents the end of the stop surface.
• the barrier rib has a rectangular shape in a plane perpendicular to the central axis.
• the cap has a hexagonal shape in a plane perpendicular to the central axis.
• the hexagonal shape of the cap allows to insert pencils of circular or hexagonal section in the cap.
• the cap has a hexagonal shape in a plane perpendicular to the central axis and comprises three internal ribs.
• the inner surface of the cap has an alternation of face with an internal rib and without rib without rib.
• the internal ribs are advantageously arranged in the middle of the inner face in a plane perpendicular to the axial direction, that is to say in a plane perpendicular to the central axis.
• the cap is made of polyolefin, for example polypropylene, polyethylene.
• FIGS. 1 and 2 are side views of a cap inserted on a pencil
• FIG. 3 are sectional views of Figures 1 and 2, respectively along the section plane III-III, IV-IV and VV;
• - Figures 6A and 6B are perspective views of the cap;
• Figure 7 is a schematic sectional view of the cap along the section plane VII-VII of Figure 6A;
• FIG. 8 is a schematic sectional view of the cap along the section plane VIII-VIII of Figure 7;
• FIG. 9 is a schematic sectional view of the cap along the IX-IX section plane of FIG. 7.
• Figures 1 and 2 show a cap 10 removably mounted on a pencil 12.
• the cap 10 is mounted on a cut end 14 of the pencil 12, that is to say that the cut end 14 of the pencil 12 is inserted into the cap 10, as can be seen in FIG. 3.
• the cap 10 is mounted on an uncut end 16 of the pencil 12, that is to say that the uncut end 16 of the pencil 12 is inserted into the cap 10, as can be seen in Figure 4.
• the cap 10 comprises a staple 18 and a rubber 20 received in a rubber receiving housing 22.
• This rubber receiving housing 22 is particularly visible in Figure 6A.
• the cap 10 has a central axis A defining an axial direction of the cap 10.
• the cap 10 has a cap body 24 on which the clip 18 is attached and wherein the rubber receiving housing 22 is arranged.
• the rubber receiving housing 22 has ribs 60 for holding the eraser 20 in the rubber receiving housing 22 by radial clamping of the eraser 20 by the ribs 60.
• the cap body 24 has a section of generally hexagonal shape, in a section plane perpendicular to the central axis A, that is to say in a perpendicular section plane. in the axial direction of the cap.
• the cap 10, more particularly the cap body 24, has an insertion opening 26 configured to receive one of the ends 14, 16 of the pencil 12.
• the cap 10, more particularly the cap body 24, has an inner surface 28 carrying at least two internal ribs 30 angularly distributed uniformly about the central axis A of the cap 10 and extending in the axial direction. , that is to say, parallel to the central axis A.
• the cap 10 comprises three internal ribs 30 angularly distributed uniformly about the central axis A of the cap 10.
• the internal ribs 30 are distributed every 120 °, as is particularly 9.
• the inner surface 28 of the cap 10 thus has an alternating face 32 carrying an internal rib 30 and face 32 without rib.
• the internal ribs 30 are arranged in the middle of the face 32.
• the cap 10 comprises an equal number of internal ribs 30 and stop ribs 36, each retaining rib 36 being disposed in the extension of an internal rib 30.
• the number of stopping ribs 36 may be different from the number of internal ribs 30.
• the stopping ribs 36 may not be evenly distributed around the central axis A of the cap 10.
• the stopping ribs 36 may also not be arranged in the extension of an internal rib 30.
• each internal rib 30 is disposed near the insertion opening 26 and a stop rib 36 is disposed in the extension of each internal rib 30 opposite the opening. insertion member 26 with respect to the internal rib 30.
• Each internal rib 30 and each retaining rib 36 has, in a plane perpendicular to the axial direction A, an inscribed diameter. The inscribed diameter 38 of the internal rib 30 is greater than the inscribed diameter 40 of the stop rib 36, as shown in FIG. 8.
• the inner rib 30 cooperates with an uncut portion of the pencil 12, or with the uncut end 16 of the pencil when the uncut end 16 of the pencil is inserted into the cap 10, or with an uncut portion 42 of the pencil 12 adjacent the cut end 14 of the pencil 12 when the cut end 14 of the pencil 12 is inserted into the cap 10. It is therefore understood that when the pencil 12 is not inserted into the cap 10, the rib internal 30 is configured to cooperate with an uncut portion of the pencil 12, the uncut end 16 of the pencil 12, or the uncut portion 42 of the pencil 12 adjacent the cut end 14 of the pencil 12.
• the internal rib 30 comprises a guide surface 44 of the uncut portion of the pencil 12 during insertion of the pencil 12 into the cap 10 and a clamping portion 46 configured to cooperate with the uncut portion of the pencil 12 In a plane passing through the internal rib 30 and the central axis A of the cap 10, the guide surface 44 has an angle ⁇ of 10 ° +/- 0.5 ° with respect to the central axis A.
• the clamping portion 46 of the inner rib 30 has a shape of triangle in a plane perpendicular to the axial direction, that is to say in plane perpendicular to the axis central A, an edge 54 of the triangle being configured to be in contact with the pencil 12 when the pencil 12 is inserted into the cap 10.
• the edge 54 of the triangle may be rounded and the contact between the pencil 12 and the cap 10 is made along this rounded edge 54, between the edge 54 and an outer surface of the pencil 12.
• the internal ribs 30, and more particularly the clamping portion 46 of each internal rib 30, allow to retain the uncut portion of the pencil 12 by radial clamping between the clamping portions 46 of the uncut portion of the pencil 12 when the pencil 12 is inserted into the cap 10.
• the inscribed diameter 38 of the clamping portion 46 of the cap 10 is greater than or equal to 95% of the minimum inscribed diameter of the pencil 12 with which the cap 10 is configured to cooperate and the inscribed diameter 38 of the part
• the clamp 46 of the cap 10 is less than or equal to 99% of the minimum inscribed diameter of the pencil 12 with which the cap is configured to cooperate.
• the inscribed diameter of the internal ribs 30 may be greater than 3 N, preferably greater than 4 N and may be less than 50 N, preferably less than 40 N.
• the stop rib 36 is configured to cooperate with the cut end 14 of the pencil 12 when the cut end 14 of the pencil 12 is inserted into the cap 10 and to cooperate with uncut 16 of the pencil 12 when the uncut end 16 of the pencil 12 is inserted into the cap 10.
• the stop rib 36 has a stop surface 48 configured to cooperate with the cut end 14 of the rod 12.
• a minimum distance 52 measured in the axial direction between any point of the stop surface 48 and the bottom 50 of the cap 10 is for example greater than or equal to 15 mm.
• the stop rib 36 has a slope forming an angle with the central axis A which is smaller than the angle ⁇ .
• the stop rib 36 comprises a stop 58 configured to cooperate with the uncut end 16 of the rod 12.
• the stop 58 is a surface of the stop rib 36 which is perpendicular to the central axis A, that is, perpendicular to the axial direction.
• each stop rib 36 has a stop 58.
• the stop function could be obtained satisfactorily with a stop 58 present on only one of the stop ribs 36, or at least with some of the stop ribs 36 not including a stop.
• the stop 58 is disposed between the insertion opening 26 and the stop surface 48.
• the cap 10 may not have a stop 58.
• the stop surface 48 may extend towards the insertion opening 26 and the uncut end 16 of the pencil 12 may abut against the stop surface 48 when the uncut end 16 of the pencil 12 is inserted into the cap 10.
• the stop rib 36 has a rectangular shape in a plane perpendicular to the axial direction, that is to say in a plane perpendicular to the central axis A.
• the bottom 50 of the cap 10 has a plurality of through openings 62.
• the uncut end 16 of the pencil 12 When inserting the uncut end 16 of the pencil 12 into the cap 10, the uncut end 16 of the pencil 12 is guided and centered by the guide surface 44 in the cap 10.
• the non cut of the pencil 12 in this case the uncut end 16 of the pencil 12, reaches the clamping portion 46 of the internal rib 30, the uncut end 16 of the pencil 12 is retained by radial clamping exerted by cooperation of the clamping portion 46 of each internal rib 30 on the outer surface 56 of the pencil 12.
• the pencil 12 is inserted until the uncut end 16 of the pencil 12 abuts against the abutments 58 of each stopping rib 36.
• the cap 10 is removably mounted on the pencil 12.
• the cut end 14 of the pencil 12 can be used for writing.
• the uncut portion 42 of the pencil 12 adjacent the cut end 14 of the pencil 12 is guided and centered by the guide surface 44 in 10
• the uncut portion of the pencil 12 in this case the uncut portion 42 of the pencil 12 adjacent the cut end 14 of the pencil 12
• the portion Uncut 42 of the pencil 12 is retained by radial clamping exerted by cooperation of the clamping portion 46 of each inner rib 30 on the outer surface 56 of the pencil 12.
• the pencil 12 is inserted until the cut end 14 comes in abutment against the stop surface 48 of each stop rib.
• the cap 10 is removably mounted on the pencil 12 and the cut end 14 of the pencil 12 is inserted into the cap 10 so that the cut end 14 of the pencil 12 is protected by the cap 10.
• a pencil 12 of hexagonal shape can be obtained by a coextrusion process of the pencil 12.
• the pencil 12 has a registered diameter 12A of 6.7 mm.
• the inscribed diameter of the pencil 12 may in practice vary between 6.7 mm and 7 mm.
• the inscribed diameter 38 of the clamping portion 46 of the internal ribs 30 will therefore be between 6.37 mm and 6.63 mm.
• the inner surface 28 of the cap 10 may have an angle of 0.25 ° +/- 0, 1 ° with respect to the central axis A to facilitate demolding of the cap 10 during its manufacture.
• the cap 10 could have a generally cylindrical shape.
• a cylindrical cap can be mounted on a hexagonal pencil, it is preferable to provide a sufficiently large rib height so that the angles formed by two successive faces of the hexagon can be received in the hood.

Applications Claiming Priority (2)

Publications (1)

Family

ID=60382359

Family Applications (1)

Country Status (7)

Family Cites Families (11)

• 2017
  • 2017-09-05 FR FR1758168A patent/FR3070628B1/fr active Active
• 2018
  • 2018-09-04 WO PCT/FR2018/052161 patent/WO2019048773A1/fr unknown
  • 2018-09-04 EP EP18774096.4A patent/EP3678874A1/de active Pending
  • 2018-09-04 MX MX2020002234A patent/MX2020002234A/es unknown
  • 2018-09-04 US US16/643,821 patent/US11560013B2/en active Active
  • 2018-09-04 CN CN201880055183.3A patent/CN111051078B/zh active Active
  • 2018-09-04 BR BR112020003818-0A patent/BR112020003818B1/pt active IP Right Grant

Also Published As

Similar Documents

Legal Events