Coating implements with material supply – Solid material for rubbing contact or support therefor – Including means to advance material
Patent
1998-03-31
2000-11-21
Recla, Henry J.
Coating implements with material supply
Solid material for rubbing contact or support therefor
Including means to advance material
401 68, 401116, A45D 4006, A45D 4020
Patent
active
061493317
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
1. Field of the Invention
The invention relates to a pencil, in particular a pencil for dispensing a soft mass for cosmetic purposes.
2. Description of the Related Art
Such pencils comprise a sleeve-like sheath with a front end and a back end, a push rod that is arranged coaxially inside the sheath and is secured with one end in axial direction to the back end of the sheath, as well as a soft mass insert that is connected to the free end of the push rod. The sheath and the front part are rotatably connected, in the manner of a helical gear. The front segment can be retracted telescopically into the sheath through a relative turning of the aforementioned parts. The front part then releases the soft mass insert, secured relative to the sheath in axial direction. Such pencils for dispensing a soft mass are described, for example, in the references U.S. Pat. No. 5,364,197 and U.S. Pat. No. 5,366,311. In addition to the axial movement, the front part of the known pencils for dispensing a soft mass also performs a turning movement, relative to the soft mass insert, during the extending or retracting movement. Owing to the frequently sticky and soft consistency, the soft mass insert can stick to the inside of the front part, especially if it has not been used for some time. If the front part is retracted in that case, it is possible that the soft mass insert will shear off as a result of the relative turning movement between front part and soft mass insert.
SUMMARY OF THE INVENTION
Based on this, it is the object of the invention to improve a pencil of the aforementioned type with respect to this problem. This object is solved in that the soft mass insert is connected rotatably to the push rod. If the soft mass insert sticks completely or only in some parts to the inside surface of the front part, this does not have an adverse effect, at least not during the retracting movement of the front part, since the soft mass insert can turn along with the front part as a result of being rotatably secured to the push rod. A shearing off of the soft mass insert is thus prevented. A design according to the invention makes sense even for pencils where the front part and the sheath are connected such that they turn together and where the push rod, which is configured as a helical spindle and operates jointly with the front part, is located rotatably inside the sheath.
The soft mass insert of one preferred embodiment is held by the end of a soft mass insert holder, which points toward the pencil tip. The other end of the soft mass insert holder is rotatably secured to the push rod, wherein the soft mass insert holder is connected such that it engages in the turning moment of the front part. Such a design ensures that a shearing off of the soft mass insert is prevented, even with masses of a very soft consistency. The soft mass insert in this case does not turn along because of a frictional or material engagement between soft mass insert and front part, but preferably because of a form-locking engagement between front part and soft mass insert holder, which is effective in turning direction. The rotatable connection between soft mass insert holder and the tip-side end of the push rod is achieved with a very simple design, which is particularly easy to assemble in that a circular positioning groove exists on the inside surface of the sheath-side segment of the soft mass insert holder, into which an annular projection, arranged on the tip-side end of the push rod, engages in the manner of a snap connection.
In one preferred embodiment, the connection between sheath and front part in the manner of a helical gear is designed such that the push rod is rotatably secured to the sheath and has an external thread, into which the front part engages. It is particularly advantageous with respect to the technical assembly if a snap connection with axially extending joining direction is effective between the external thread of the push rod and the front part. Such a snap connection is advantageously realized in
REFERENCES:
patent: 1916199 (1933-07-01), Back
patent: 5018892 (1991-05-01), Krueckel et al.
patent: 5364197 (1994-11-01), Powers
patent: 5366311 (1994-11-01), Powers
patent: 5423623 (1995-06-01), Bakic
patent: 5547300 (1996-08-01), Powers
Raps Juergen
Zahn Werner
A. W. Faber-Castell Unternehmensverwaltung GmbH & Co.
Prunner Kathleen J.
Recla Henry J.
Spencer George H.
Wells Ashley J.
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