DE1984491U - BALLPOINT REFILL. - Google Patents

Description

Patent attorney

φΙ.-ing.Th.Hoefer

This a. -Act .Z. 2639/67

_AQD . . ,,. , November 17, 1967

Bielefeld, the

Kreuzstrasse 32

Telephone 61836 Telex 9-32449 Bank account: Commerzbank AG, Bielefeld Postal checking account: Hanover Office No. 68928

ROU - bill factory for writing instruments GMBH ₃ Schötmar / Lippe,

Industriestrasse 2

"Ballpoint pen refill"

The invention relates to a ballpoint pen refill check with front in the refill tip rotatably mounted ball and thus ^{comparable:-bound} rüclcseitig open lead pipe. - ν ^

With such ballpoint pen refills there is the disadvantage that the Writing paste on the one hand in the area of the writing ball and on the other hand

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in contact with the air at the open end of the inner tube comes and thus dries and dust particles settle on the Knock down paste. This disadvantage affects the shelf life of the ballpoint pen refill and thus with Refills that have been stored for longer also improve the writing quality, provided that the The paste has not even dried in the area of the ball so that the lead no longer writes.

The object of the invention is to provide a ballpoint pen refill _s., Which is so packed that the write ₉ paste does not occur during storage, with the outside air into contact.

According to the invention is a ballpoint pen refill with a front The ball rotatably mounted in the lead tip and the lead tube open at the back, characterized in that the ball and the front part of the tip is surrounded airtight by a plastic film and in the rear open end of the lead tube the paste column is hermetically sealed by a sealing plug floating on the writing paste.

The plastic film enveloping the tip of the lead and the part of the ball protruding from the tip is included so thin that when you write ^, i.e. when you turn the ball.,

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This film tears under the pressure of the hand, so that the ball releases the flowing paste onto the writing surface. The paste is kept as fresh _s that also writes a long-mounted mine immediately like a freshly-filled mine. Such an airtight protective film can be produced in a simple manner by immersing the lead tip in liquid plastic, which then adheres to the tip like a film and dries.

The stopper floating on the column of paste is advantageously there made of a synthetic resin based on silicone, which has the advantageous property that it can also be used in its Bex \ re & ng (Succession) to the column of paste, which sinks towards the tip, a permanent airtight seal between them and forms the inner wall of the lead tube, on which it slides along with the writing paste and thus no residues of Write paste will remain on the wall as the lubricating or sliding stopper will take away any residue from the inner wall.

This combination of the front and rear ends gives a ballpoint pen refill filled with paste what it was before not achievable shelf life.

In the drawing is an embodiment of the invention shown. It shows ~ ^

a ballpoint pen refill in side view with partial cut with front and back airtight closure.

With Io, a lead tube that is open at the back is called _s which is made of metal or plastic and carries a front tip 11 made of metal _s in which a writing ball 12 is rotatably mounted.

This tip 11 with partially protruding, rotatable ball is immersed in liquid plastic so that it is necessary Area is surrounded like a hat by a thin plastic film 13, which forms the sphere and thus the gap between the tip and the sphere airtight so that no connection between the filled writing paste and the outside air.

The cartridge tip is pressed onto the desk pad for use while anything by hand pressure moves ι here on this desk pad tears the film 13 in the areas of

Ball 12 ^ j ^ -dasj ^ this ball with fresh writing paste _.

immediately writes.

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On the filled writing paste 14 in the open end of the lead tube Io, a silicone sealing plug 15 _s, the diameter of which is approximately equal to its length, floats. This size ratio of the completion plug particularly _s advantageous since in this Grosse a good sliding property on one hand and on the other hand a proper buoyancy is added so that the terminating plug is always without air inlet to the write paste in compound.

In such an arrangement one with the writing paste in connection With a permanent end plug, the formation of an upper one, which is necessary today in many ballpoint pen refills, is no longer necessary Meniscus on the column of writing paste, around a backward discharge to prevent.

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Claims (3)

■■ j * - "S c h u t ζ a η s ρ r ü c he _S wherein j that the ball and the front part of the tip of a first pen refill with a front rotatably mounted in the refill tip ball und'rückseitig open lead pipe plastic film airtightly surrounded, and in the rear open end of the refill tube, the paste column through a on the write paste floating stopper is hermetically sealed. 2. Ballpoint pen refill according to claim I _5, characterized in that the film surrounding the tip is formed as an immersion film made of plastic. 3. Ballpoint pen refill according to claim 1 and 2 _S, characterized in that the length of the end plug corresponds approximately to its diameter.