Abstract: A mechanical pencil includes a writing lead, a chuck unit for chucking the writing lead, and a cushion spring configured to elastically support the chuck unit in such a manner that the chuck unit is retractable with a writing pressure. An output of the cushion spring, in response to a cushion stroke, is non-linear, and a slope of a spring constant, in a region where the cushion stroke is relatively small, is smaller than a slope of a spring constant in a region where the cushion stroke is relatively large.

Abstract: A cylindrical cosmetic container with an inner cap (7) inside a cap (5) fit outside an upper end of a container body (X) uses a first motion resistance at a halfway covering posture to an immediately preceding covering posture and a second motion resistance from the immediately preceding covering posture to a fully cover posture while the container body (X) is covered with the cap (5), in which the inner cap (7) includes a protrusion (7f) to deform towards an outer diameter side while applying the first motion resistance by being pressed into sliding contact with an extending upper end (4c) of the container body (X) and a projection (7d) projecting from an outer circumferential surface for applying the second motion resistance greater than the first motion resistance when a convex rib (4b) moves over the projection (7d).

Abstract: A lipstick case includes a cylindrical case body and a tube axially movably mounted in the case body to hold a lipstick. The tube has a vertically sliding groove and a guide groove disposed at two opposite lateral sides of a bottom base block thereof. A limiter device is formed of a holder base, a limiter element, a spring member and a constraint member. The limiter device is fastened to the inside of the case body for guiding and limiting axial movement of the tube relative to the case body.

Abstract: A lipstick case is disclosed to include a cylindrical case body, a tube axially movably mounted in the case body to hold a lipstick and having a vertically sliding groove and a guide groove disposed at two opposite lateral sides of a bottom base block thereof, and a limiter device formed of a holder base, a limiter element, a spring member and a constraint member and fastened to the inside of the case body for guiding and limiting axial movement of the tube relative to the case body.

Abstract: An adjustable pencil for varying the pressure on a piece of lead includes a cylindrical barrel, and a guide tube containing a piece of lead disposed in the barrel. A coil spring, a rectangular channel with a plurality of stops and a follower compresses the spring for increasing or decreasing the longitudinal force applied to the lead as it engages a writing surface. A knob rotates the guide tube to open or close a pair of jaw like grips for maintaining a pre-selected length of lead extending from the tip of the pencil.

Abstract: A cosmetic dispenser for producing an axial movement of a cosmetic between extended and retracted dispositions. A cam member is rotatably engaged with an adapter member in a mating relationship. An elevator member with a cosmetic retaining portion and an elevator rod move axially in response to a rotation of the cam member in relation to the adapter member. A proximal end of the elevator rod can be received through an elevator aperture in the adapter member to enable a sliding of lugs on the elevator rod along a helical thread of the cam member. Frictional drag between the cam member and the adapter member can be produced by one or more drag protuberances therebetween. Where the drag protuberances project from the adapter member, a thin wall portion therein can enable a resilient deflection of the drag protuberances.

Abstract: A dispenser made of four molded polymeric pieces, a housing, an annular connector, an insert and an elevator. The dispenser has a slim profile that allows a twist-up dispensing of product having friction drag and suitable camming for an appealing movement of the parts and dispensing of product.

Abstract: A cosmetic dispenser for axially moving a volume of cosmetic between an extended disposition and a retracted disposition with an elevator member, an innerbody with an open inner volume for receiving the elevator member, and a spiral member with an open inner volume for receiving a body portion of the innerbody in a relatively rotatable relationship. At least one protuberance, which can be inflexible, can project from a shoulder portion of the innerbody and can be axially aligned with a flexible wall segment of the spiral member thereby to produce a frictional drag between the innerbody and the spiral member. The flexible wall segment of the spiral member can comprise a proximally disposed skirt. Axial movement of the elevator member can be produced by opposed lugs that project from the elevator member through opposed longitudinal tracks in the innerbody and into engagement with opposed spiral threads on the spiral member.

Abstract: A device for packaging and dispensing a substance including a drive mechanism having a first part and a second part capable of rotating around an axis relative to the first part to dispense a substance. The first or second part having an element which is axially stationary along the axis relative to the other of the first or second part. The device further including a base part in which at least part of the second part is received and an anti-rotation element secured to the second part. The anti-rotational device adapted for cooperating with the base part in such a manner as to enable the drive mechanism to move axially along the axis relative to the base part while enabling the second part to be substantially stationary in rotation relative to the base part. An elastically deformable member is included for exerting a force against the drive mechanism.

Abstract: A lipstick mechanism including an internal substantially tubular duct that rotates in an external substantially tubular duct, the ducts having longitudinal slots and helical slots that guide in translation studs of a lipstick-holder cup disposed in the internal tubular duct, the internal duct including a substantially cylindrical base with a restriction relief that bears elastically on a substantially cylindrical surface connected to the external duct, such that the surface connected to the external duct is elastically deformable and the restriction relief is formed by a raised area sunk in the surface.

Abstract: This lipstick mechanism comprising an inner tubular sleeve (1), an outer tubular sleeve (3), a stick-holder cup (2) arranged in the inner tubular sleeve (1). The inner sleeve comprises a cylindrical base (12) in the wall (21) in which are formed friction pads designed to be pressed elastically on a cylindrical bearing surface (7) linked to the outer sleeve (3), a thinned wall (23) completely surrounding the periphery of each pad (22).

Abstract: A cosmetic container (10) comprises a housing assembly (1, 3, 4, 7, 9) with an annular projection (8) and a cap assembly (11, 12) with an inner cap member (12) engageable with the annular projection. The inner cap member has a wall portion (15) between upper and lower annular external swells (16, 17), which is deformed to provide air-tight engagement with the annular projection in a capped condition. The lower swell (16) comprises a plurality of spaced segmental annular projections (161) formed substantially around the outer surface of the inner cap member and one or more of dotty projections (162) positioned substantially within each space between adjacent two of the segmental annular projections. The lower swell acts as a first stopper for preventing removal of the cap assembly from the housing assembly, whereas the upper swell acts as a second stopper for preventing excessive insertion of the housing assembly into the cap assembly.

Abstract: A cosmetic container is provided which has a smoothly operating mechanism with low swivel torque, and which avoids unwanted push-back. The container comprises an inner first tubular sleeve, a cosmetic carrier positioned for movement longitudinally within the first tubular sleeve between an extended upper position and a retracted lower position, and a second tubular sleeve surrounding the first sleeve and rotatable with respect to the first sleeve. The second sleeve has a helical channel extending along an inner periphery of the sleeve for extending and retracting the cosmetic carrier upon rotation of the first sleeve within the second sleeve. A cylindrical skirt on a lower end of the second sleeve extends below the helical channel surrounding a portion of the inner first tubular sleeve. One or more protrusions project outwardly from the cylindrical sidewall of the first sleeve.

Abstract: The device comprises: a tubular element (1) with a slideway in which there is mounted so that it can slide a cup (3) intended to receive a stick (B) of product and including at least one stub (4) engaged in a slideway (2); a cylindrical casing (11) in the wall of which is provided at least one helical slot (13), this casing being fitted tightly onto the tubular element, the stub (4) being engaged in a slot (13); and an outer sleeve (14) in which the casing (11) is immobilized, while the tubular element (1) can turn relative to the casing (11) and sleeve (14). Flexible rubbing means (F) are provided between the casing (11) and the tubular element (1), and these include at least one tongue (15), flexible in the radial direction, provided on one of the components and designed to interact with an inclined bearing surface (20) provided on the other component. The tongue (15) and the inclined bearing surface (20) are situated, in the axial direction, beyond the lower end of the outer sleeve (14).

Abstract: A cosmetic dispenser having a decorative shell, and a cap which normally snap fittingly engages the upper portion of the body. Interiorly there is a spline tube having a pair of opposed vertical tracks terminating in an upper catch and a lower catch. A riser cup is provided with a plurality of circumferentially downwardly spaced legs which deflect outwardly to resiliently engage the interior portion of the spline tube. A relaxation taper at the lower portion of the spline tube receives the depending legs from the riser cup and thereby lets them expand to a relaxed condition in which condition they will retain their set. At the opposed portion of the motion, when the cup is near the top, provision is made for windows which are short vertical slots in the cup and in coordinated relationship with the helical track so that at the upper portion of its motion the helical cup legs rest either in the vertical track of the spline tube or in the windows.

Abstract: A case for lipstick and similar materials with respectively rotating concentric tubes with axial movement of cup-slider (2) which bears stick (1) of pasty substance, characterized by the fact that it has a device for braking with respect to rotation and compensation for axial play between the tubes consisting of flange (10), added on or not, connected to the base of internal tube (5) and having at least one flexible extension (14) which bears elastically against edge (15) of the base of external tube (7).

Abstract: In a cosmetic pencil comprising a filler stick disposed in a sleeve and an elongated basic body with an automatic advance acting on the filler stick for linear displacement of the filler stick out of the sleeve in the direction towards the free tip of the cosmetic pencil, it is provided, with a view to the possibility of one-hand operation, that the automatic advance is an automatic pusher mechanism, the automatic advance cooperating with a thin pin, for instance a wire section, which conventionally corresponds to the lead of a lead pencil and which acts on the rear of the filler stick via a piston section, pushing the filler stick forward, the piston section being sealingly guided by defined frictional engagement in an envelope, such as a sleeve, which envelops the filler stick, this constituting the required filler stick brake.

Abstract: A cosmetic container (10) comprises a housing assembly (1, 3, 4, 7, 9) with an annular projection (8) and a cap assembly (11, 12) with an inner cap member (12) engageable with the annular projection. The inner cap member has a thin wall portion (15) defined between a pair of upper and lower annular external swells (16, 17), which is deformed to provide air-tight engagement with the annular projection in a capped condition. The lower swell (16) acts as a first stopper against removal of the cap assembly from the housing assembly, whereas the upper swell (17) acts as a second stopper against excessive insertion of the housing assembly into the cap assembly.

Abstract: A lipstick dispenser includes a tubular element with a slideway in which there is mounted a cup for receiving a stick of lipstick and at least one stub engaged in a slideway, a cylindrical casing in the wall of which is provided at least one helical slot, this casing being fitted tightly onto the tubular element, the stub being engaged in a slot, and an outer sleeve in which the casing is immobilized. The tubular element can turn relative to the casing and sleeve. A tongue, flexible in the radial direction, is provided on one of the casing and the tubular element components and is designed to interact with an inclined bearing surface provided on the other component. The tongue and the inclined bearing surface are situated, in the axial direction, beyond the lower end of the outer sleeve.

Abstract: A device for the packaging and application of a friable product presented in the form of a lipstick including a tubular element with slide(s), wherein there is slidably mounted a cup intended to receive the lipstick, the cup having at least one stub engaged in a corresponding slide delimited by two longitudinal edges. A cylindrical shell provided with an internal helical groove has the tubular element freely rotatable inside it, with the stubs of the cup engaging in the helical grooves of the shell. Soft friction between the cup and the tubular element is ensured by a tangential elastic deformation of at least one of the longitudinal edges of a slide during the passing of the stub whose width is slightly larger than the width of the slide.

Abstract: A cosmetic container, such as a lipstick container, having a tubular inner sleeve rotatable within a tubular outer sleeve and a cosmetic carrier positioned therein. The cosmetic container may be extended and retracted for the application and storage of the cosmetic. The inner sleeve includes a shank defining a longitudinal slot for receiving lugs extending radially outward from the cosmetic carrier and a manually rotatable base. The shank includes at least one radially outwardly facing rib extending circumferentially along at least a portion of the shank. Preferably a plurality of ribs extend from the inner sleeve and are positioned in a flexible region thereof. The outer diameter of the ribs is at least equal to the inner diameter of the outer sleeve to create torque therebetween.

Abstract: In a cosmetic container an outer body portion surrounds a main body portion and is rotatable with respect thereto. Rotation of the main body moves a cosmetic holder up and down within the main body. An insert sleeve is fixedly secured to the outer body and surrounds the main body. The upper portion of the outer body is formed to provide an integral active portion positioned between the main body and the insert sleeve with gaps therebetween. The active portion of the outer body is provided with an inwardly projecting circular rib at an intermediate portion thereof which rotatably contacts the outer peripheral surface of the main body. The opposite end of the active portion of the main body elastically engages with the inner peripheral portion of the insert sleeve. Thus, the active portion of the outer body will act as a spring and can be deformed appropriately within the space between the main body and the insert sleeve.

Abstract: A mechanism for extending and retracting a cosmetic pomade that has a base with a raised portion and a shelf, at least one aperture positioned near the shelf, and a middle portion having a plurality of slots. The mechanism also includes a cup for holding the cosmetic pomade. The cup is positioned within, and has protrusions for engaging the slots of, the base. A spiral guide member is positioned coaxially with the base. The spiral guide member has a helically-shaped track and a substantially smooth portion or extension. An insert is positioned within the base. The insert has at least one radially projecting tab that extends through the at least one aperture positioned near the shelf of the base to contact the substantially smooth extension of the spiral guide member. Preferably, the insert includes two or more tabs and each one of them is made from a flexible material having a relatively low coefficient of friction relative to the material of the spiral guide member.

Abstract: A cosmetic stick lift mechanism for a case having concentric sleeves whose respective rotation is controlled by shoe portions in the form of thin, diverging tongue portions which project from the continuous subjacent external wall of the base of the internal sleeve, with their free flexible ends oriented towards the adjacent end of the base of the sleeve.

Abstract: A lipstick including a twist sleeve, which is mounted on a slotted tube and has a lower end edge resting on an annular ledge of the slotted tube, and a retardant ring formed integrally with the twist sleeve and arranged in a free space formed between the annular ledge of the slotted tube and the lower end of the twist sleeve.

Abstract: A slider for a mechanical pencil comprises: a slider body provided with a through bore through which a lead is passed and disposed in the tip of a barrel so as to be axially slidable in a predetermined range; a lead guide concentrically fixed to the slider body so as to let the lead slide therethrough; a sliding part concentrically connected to the outer circumference of the rear end of the slider body so as to extend forward and to be able to slide against a predetermined frictional resistance relative to the inner circumference of the tip; and a lead guiding part disposed in one end of the slider body and capable of expansion and of applying a frictional resistance smaller than that applied to the sliding part by the inner circumference of the tip to the lead.

Abstract: In the lipstick case having a lipstick mechanism, comprising a slotted tube (5), a tube (4) which rotatably surrounds the slotted tube (5) and exhibits an internal thread (15), and a lipstick holder (6) which is arranged so that it can move in the slotted tube (5), the lipstick holder (6) is provided with guide cams (13) which engage through the slots of the slotted tube (5) into the thread turns. Furthermore, the lipstick holder is provided with spring elements (8) which have cams (7) which are supported on the slotted tube, thereby forming rear-engagement lugs (21), and the slotted tube is provided with recesses (9) into which the cams (7) of the spring elements engage.

Abstract: An automatic-pencil cartridge includes a lead automatic compensation device which is in the front section of the cartridge and which can be triggered to automatically output the lead for further writing when the lead is worn out and unsuitable for writing; a lead holder which is in the middle section of the cartridge and which can ensure that the lead is delivered only to the exit of the cartridge; a lead-storing device, which is in the back section of the cartridge and which can be used to store lead and to open the lead holder; a cup device, used to enclose the lead automatic compensation device and the lead holder with a retainer. The lead-storing device can be arranged in one end of the cup device.

Abstract: A cylindrical cosmetic container includes an inner tubular member (1) formed with axially extending slots (2); an outer tubular member (7) formed with a spiral groove (9) and rotatably fitted to an outer circumferential surface of the inner tubular member; and a movable cup member (11) for mounting thereon a cylindrical cosmetic (15) to be accommodated within the inner tubular member, and the movable cup member having projection pins (13) attached on an outer circumferential surface thereof and engaged with the spiral groove of the outer tubular member through the slots of the inner tubular member. The inner tubular member (1) is formed with a bridge portion (101) at a base end portion thereof; and the bridge portion is further formed with a projection portion (103) which is brought into elastic contact with the base end portion of the outer tubular member.

Abstract: A cosmetic preparation dispenser is provided that has a resilient tab formed on the lower end of the innerbody that presses against the cam sleeve to provide a desirable swivel drag, and which tab is prevented from undesirable deformation that reduces the swivel torque by providing a relaxation zone in the cam sleeve where the tab can recall its original shape. The relaxation zone is preferably a thin walled section of the cam sleeve that is formed by the combination of a flat outer wall and a circular inner wall, which thin walled section is deformable by pressure from the tab when the tab is seated against the thin walled section. The tab presses against the cam sleeve which causes the cam sleeve to move up a bevelled shoulder to enhance swivel drag between the cam sleeve and a retaining lip on the innerbody. The bevelled shoulder also engages the cam sleeve when force is applied to the elevator.

Abstract: A device for holding and dispensing a pasty product such as lipstick includes an inner tubular element and an outer casing with the inner tubular element having a slide or channel extending along its length; the outer casing has an interior wall provided with a helical groove and a cup is positioned for slidable movement in the tubular element; the cup is provided with a pin which extends through the slide or channel and engages the helical groove so that relative rotation will effect translation of the cup along the tubular element; a breaking member is positioned between the tubular element and the casing adjacent one end of the device.

Abstract: A cosmetic preparation dispenser is provided that has flex tabs formed on the lower end of the innerbody that bear against the cam sleeve to provide a desirable swivel torque, and which extend inwardly to engage or confine the elevator cup when it is fully retracted, to prevent vibration of the cup within the innerbody. Damage to a cosmetic pomade held in the cup is less likely during transport because the cup is secured. The flex tabs also minimize pomade back-off during consumer use by providing a frictional braking effect.

Abstract: A cosmetic preparation dispenser is provided that has an incremental feel created by the interaction of a resilient tab extending outwardly from the dispenser's innerbody with a plurality of rib elements provided on a surrounding wall of a cam sleeve so that the tab cams up and down on the ribs to increase and decrease resistance to relative rotation of innerbody and cam sleeve to give the desired incremental feel.

Abstract: A cosmetic container comprising a tubular base having an internally threaded lower section and an internally smooth upper section mates with a tubular rotatable sleeve extending up from the base. A tubular telescoping screw assembly has one part secured to the base and one part secured to a pomade cup keyed for rotation with the sleeve. A downward tab is formed integrally with the sleeve and has an outward nib on its lower end which presses against the smooth inner surface of the upper section of the base. The nib exerts a frictional drag on the rotation of the sleeve with respect to the base to give the operation of the container a silky "feel".

Abstract: Device comprising a collar (10a) whose annular base, fixed to the inner member (4a), is extended by a plurality of lugs (9a) which are resiliently deformable radially and whose free ends come into frictional contact within a cylindrical bearing solidly attached to the outer member (6a).

Abstract: This invention relates to a mechanical pencil capable of utilizing effectively a writing lead and having an improved lead protection pipe. A protuberance having a surface having a hardness equal to, or higher than, that of a lead is formed on the inner surface of the lead protection pipe by dispersing and depositing powder; very small coil-like fibers having a surface having hardness equal to, or higher than, that of the lead are dispersed and deposited on the inner surface of the lead protection pipe through a base material; an inorganic film having a protuberance having hardness equal to, or higher than, that of the lead is formed on the inner surface of the lead protection pipe; or a ring-like lead retaining member is disposed inside the lead protection pipe. The lead retaining member has a treated portion having a surface having hardness equal to, or higher than, that of the lead, and a partial play relative to the inner surface of the lead protection pipe.

Abstract: A lipstick container is disclosed having an inner body member with an upper tubular portion. An outer body member surrounds the tubular portion and is mounted thereon for relative rotation thereabout. A base member surrounding the outer body member is in fixed engagement with the inner body member. A slidable cup received in the tubular portion carries the lipstick mass. Relative rotation between the inner body member and the outer body member moves the slidable cup between a protracted position and a retracted position. A central ring partially surrounding the outer body member and secured to the base member includes a plurality of projecting biased elements for engaging the outer surface of the outer body member to provide a radial force thereon whereby an approximately constant torque is required to enable relative rotation therebetween.

Abstract: A lead feed mechanism for a mechanical pencil, in which a lead protruded by a certain length from a lead protection pipe housed in a bottom member attached at the bottom of the pencil is fed together with the pipe, and which comprises a lead chuck which is split in plural parts along the axis of the pencil and whose bottom sections pinch the lead on its outside circumferential surface. A sleeve contains the lead chuck so as to urge the lead chuck upwards by an elastic member. The sleeve includes an engaging portion provided on the inside circumferential surface of the top portion of the sleeve and engaged with an engaging portion provided on the outside circumferential surface of a bottom bearer for a lead pipe in which a spare lead is housed. A frame is provided around the sleeve which is fitted on the bottom with a pushing member which bears by the open top of the frame an elastic member provided between the bottom bearer and the frame.

Abstract: A mechanical pencil is disclosed in which lead feed occurs automatically upon lifting of the pencil from the paper surface or the like and in which the slider can be locked in a retreated position when the pencil is not in us.

Abstract: This invention relates to a container for feeding a bar shaped article such as an erasing gum, a pencil lead, a crayon, a pastel, or an eyebrow stick, especially for advancing or retracting the bar shaped article. A bar shaped article (8) is inserted into an inner sleeve (2) from the rear end with the outer sleeve (1) being held by the hand, then the rear end of the inner sleeve (2) is pressed. Inner sleeve (2) moves forward and rearward against the resilient force of an elastic biasing member (3). A chuck (4) at the end of the inner sleeve (2) opens and closes repeatedly and the end of the bar shaped article (8) is fed out and can be used. When the chuck (4) holds the bar shaped article (8) in an unused state a chuck open means opens the chuck 4 slightly and loosens the securing force preventing encroachment of the chuck (4) into the article (8) allowing the chuck (4) to easily separate from the article (8) when the article (8) is fed out.

Abstract: A case for stick cosmetics, particularly lipsticks is described, formed by an external base, an intermediate body, a stick holder and a cap, comprising improvements in the elements for coupling the parts together and the moulding of the parts. Methods are also described for moulding the lipstick itself directly inside the case.

Abstract: A lipstick container having an attractive noncircular form includes a unique operating mechanism for reciprocating a cup member adapted to hold a mass of lipstick. The operating mechanism includes a friction ring which is fitted on the outer body member whereby a constant swivel torque is required to opereate the mechanism through the length of its stroke. The friction ring creates a smoothly operating, luxurious feeling mechanism, limits relative axial movement or "shuck" between the inner and outer body members, and eliminates the need for a bottom pair of lock extension slots.

Abstract: A device for braking between two substantially coaxial parts mounted for rotation relative to one another comprises a casing connected for rotation with a first part and adapted to surround at least a portion of the second part, the casing having flexible friction surfaces driven by the casing and situated against the inside surface of the casing, these friction surfaces being adapted to rub permanently against the outside surface of the second part.

Abstract: An automatic lead advancing mechanism for a mechanical pencil has at its writing point a lead guide tube which is movable axially against a clamping member to cause radially movable components of the clamping member to clamp the lead therein during the writing position of the pencil. The lead guide tube moves axially inwardly against a force exerted by a compression spring interposed between the clamping member and a thrust member, a portion of which is engaged by the lead guide tube and another portion of which has a beveled surface engaging a correspondingly beveled surface on the clamping member. The co-acting beveled surfaces exert both axial and radial forces to the clamping member.

Abstract: A mechanical pencil having a writing point tube slidably mounted on the forward end portion of a pencil casing, an annular slider device slidably mounted within the pencil casing and having a lead retainer, a first spring for urging the writing point tube in the forward direction, a collet chuck mechanism having a lead engaging collet and a chuck-actuation cylinder, a second spring urging both the lead engaging collet and the chuck-actuation cylinder in the opposite direction and a third spring for urging the collet chuck mechanism in the forward direction. The pencil has a locking device for temporarily engaging the slider at its retracted position, and a pusher for releasing the engagement of the slider. When an axial thrust is applied to the writing tip of the pencil for lead advancement, the slider and the collet chuck mechanism as well are retracted within the pencil casing with their positional relation being unchanged.

Abstract: A mechanical pencil with automatic lead advance in which a slider is temporarily locked at the time when a rearward thrust applied to the pencil tip is released. The slider is locked by an arrangement in which a movable locking tube is disposed around the slider. The locking tube can be inclined relative to the longitudinal axis of the pencil by a spring device so that the slider, when retracted, can be temporarily locked by the inclination of the locking tube.

Abstract: A knock type sharp pencil provided in its outer cylinder with a core holding mechanism composed of an inner cylinder coaxially arranged in the outer cylinder, a lead chuck inserted in the inner cylinder and including a chuck portion projecting out of the front end of the inner cylinder, a chuck ring inserted between a flange portion of the inner cylinder and the chuck portion of the lead chuck, a core case provided at its rear end with a knock portion and connected to the rear end of the lead chuck, and a spring means arranged in the inner cylinder and inserted between the flange portion of the inner cylinder and the front end portion of the core case, the spring means urging the core case backwardly.

Abstract: A mechanical pencil in which the lead is advanced by squeezing a cylindrical depression member provided at the position of the writer's fingers during normal writing operations. The pencil includes a hollow body with front and rear axial sleeves. A chuck is disposed within the pencil body which has a resiliency which urges the chuck to open outwardly at the front end thereof. A slider including a lead holding member for lightly holding the lead is slidably positioned at the tip of the front axial sleeve. Means is provided for transmitting movement from the depression member, which is formed of a resilient material flush with the cylindrical surface of the pencil body, for transmitting movement from the depression member to the chuck. A lead casing means is disposed in the rear axial sleeve which in some embodiments has the dual function of transmitting movement from a push button provided at the rear of the pencil to the chuck for advancing the lead in a conventional manner.

Abstract: A mechanical pencil wherein a lead is propelled through a lead insertion tube provided at the forward end of the pencil body by the propulsion of a lead sustaining and feeding mechanism consisting of a chuck and the like, the mechanical pencil also having a lead protective device wherein a thin film made of an elastic material, such as rubber, synthetic resin or the like, is provided over the whole length of the inner surface of the lead insertion tube so that the lead is permitted to pass therethrough with ease, the elastic thin film being adapted to have a relatively greater thickness at the forward end part of the lead insertion tube so as to form a lead sustaining portion, the elasticity of the lead sustaining portion precluding the lead from slipping out due to own weight when released from the lead sustaining and feeding mechanism thereby minimizing the loss of lead.

Abstract: A mechanical pencil in which a tubular casing is formed with a lead-guiding passage which has a leading end open outwardly away from the casing. A lead is advanced through the passage by a collet movable between a first position in which the lead is clamped and a second position in which the lead is released. An element normally presses the lead, when the latter is in the passage, against an inner surface of the passage for preventing undesirable sliding of the lead along the passage when the collet releases the lead.