US2417925A - Adjustable eraser - Google Patents

Adjustable eraser Download PDF

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Publication number
US2417925A
US2417925A US474870A US47487043A US2417925A US 2417925 A US2417925 A US 2417925A US 474870 A US474870 A US 474870A US 47487043 A US47487043 A US 47487043A US 2417925 A US2417925 A US 2417925A
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Prior art keywords
holder
stick
strip
erasing
rubber
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Expired - Lifetime
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US474870A
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Gerster-Seiler Jakob
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Gerster-Seiler Jakob
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Priority to CH2417925X priority Critical
Application filed by Gerster-Seiler Jakob filed Critical Gerster-Seiler Jakob
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B43WRITING OR DRAWING IMPLEMENTS; BUREAU ACCESSORIES
    • B43LARTICLES FOR WRITING OR DRAWING UPON; WRITING OR DRAWING AIDS; ACCESSORIES FOR WRITING OR DRAWING
    • B43L19/00Erasers, rubbers, or erasing devices; Holders therefor
    • B43L19/0056Holders for erasers
    • B43L19/0068Hand-held holders
    • B43L19/0075Hand-held holders of the pencil type
    • B43L19/0081Hand-held holders of the pencil type of the mechanical pencil type
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B43WRITING OR DRAWING IMPLEMENTS; BUREAU ACCESSORIES
    • B43KIMPLEMENTS FOR WRITING OR DRAWING
    • B43K29/00Combinations of writing implements with other articles
    • B43K29/02Combinations of writing implements with other articles with rubbers

Description

March 25, 1947. I J. GERSTER-SE'ILER- 2,417,925
ADJUSTABLE ERASER Filed Jan. 28, 1943 INVENTOR. JACOB GERSTER-SEILER BY AGENT.
Patented Mar. 25, 1947 ADJUSTABLE ERASER Jakob Gerster-Seiler, Jegenstorf, Bern, Switzerland 8 Claims.
My invention relates to an eraser and more particularly to a device comprising a tubular holder and a longitudinal tip or stick of rubber or similar erasing material, inserted in said holder and projecting over one end of the holder, said rubber stick being slidable in the axial direction of the holder whereby the projecting length of the rubber can be adjusted and fresh erasing material can be fed after the consumption of the projecting part, of the tip.
Objects of my invention are to provide an erasing tip of the kind described which, durin the erasing operation, is reliably secured against being shifted into the holder or being turned in the same; to provide for convenient re-adjustment of the projecting rubber end after consumption of the uttermost end of the rubber tip; and to accomplish these results with handy, simple and inexpensive means.
According to my invention, a Strip or blade of a material harder than the rubber, preferably of non-oxidizing metal, is inserted between the holder and the rubber stick and serves as an anchor for said stick. This anchor strip may have various shapes, two of which are described in the following description and illustrated in the accompanying drawing in which:
Fig. 1 shows an exemplifying embodiment of the invention, the holder and anchor strip being shown in a longitudinal cross-section.
Fig. 2 shows another exemplifying embodiment in the same manner.
Fig. 3 shows a view of the outer surface of the anchor strip used in the embodiment shown in Fig. 2.
Fig. 4 shows a view of the inner surface of the anchor strip used in the embodiment shown in Fig. 1.
Fig. 5 shows a cross-section taken along the line 5-5 in Fig. 1.
Fig. 6 shows a front view of the anchor strip seen from the right side in Fig. 1.
Fig. '7 shows a rear view of the same anchor strip seen from the left side in Fig. 1.
Fig. 8 shows a cross-section taken along the line 88 in Fig. 2.
Referring particularly to the embodiment shown in Figs. 1, 4, 5, 6, and '7, numeral I indicates a tubular holder having longitudinal indentations or grooves 2. In Fig. 1, the left end of the holder I is broken off. This end is immaterial for the invention and may be adapted for holding a pencil.
A rubber stick 3 having the same or a slightly smaller diameter than the inner diameter of the 2 holder l is inserted in the other end of the holder l so that the outer end of 3 is free to be used for erasing. The length of the stick 3 is sufficient for feeding erasing material to the open when the outer tip of the stock is consumed.
An anchor strip 4 is inserted between the inner surface of the holder l and the rubber stick 3. The strip 4 has a width covering a section of the circumference of the stick 3 and a relatively small thickness. The outer surface of the strip 4 is slightly concave so that this surface about fits the inner surface of an indentation 2. The inner surface of the strip 4 is provided with a plurality of depressions 5, the longitudinal crosssection of the strip thereby having a saw-like shape. The individual teeth of this saw-shape have sides relatively long and gradually recessing at the inner side (left side in Fig. 1) and considerably steeper at the front side (right side in Fig. 1). The inner end of the strip 6 terminates in a thin blunt edge 6. The outer end of the strip forms a knob or boss 1 extending to the outer side somewhat over the outer surface of the holder l. The outer rim of the holder is provided with a recess or incision in which the boss I finds place without towering in axial direction over the rim of the. holder, This boss acts as a handle for pulling or pushing the strip 4 and, as a stop for the inward motion of thesame.
A clip or resilient clamp 8 is affixed to the boss I and extends over the outer surface of the holder I, the far end 9 of this clip touching said surface. The clip is not indispensable, a modification without the clip 8 being also operable. But the clip constitutes an improvement insofar as it makes the pulling and pushing of the strip 4 more convenient, contributes to secure theproper position of the strip at the wall of the holder l and, at the same time serves as means for carrying the entire device inside or outside of a pocket or the like, the wall of such pocket being clamped between the clip and the holder.
The embodiment shown in Figs. 2, 3 and 8 comprises a holder ll having a circular wall, a rubber stick l3 similar to the stick 3 in the embodiment described before, and an anchor strip M having depressions I5, a thinned end edge l6 and a boss ll, the details l5, l6 and I"! being similar to the details 5, 6 and "I of the first embodiment. The cross-section of the strip I4 is bordered by two arcs and, thus, has about a ship-like shape. The outer arc fits about the inner wall of the holder I I. The inner arc presses into the rubber stick 13. The clip 8 of the first embodiment is replaced by a member is forming an eye l9. The advantages of these parts are about the same as those of the parts 8 and 9, except that the eye has the additional advantage to provide means for convenient suspension of the entire device.
In order to secure the eraser stick 3 or l3 to the holder, the thin edge 6 or IE of the anchor strip is introduced between the stick and the inner surface of the holder, and the boss I or IT is pushed inward until the strip reaches the position shown in the drawing. In this position, the uneven surface of the anchor strip engages frictionally the rubber stick and prevents the same from being turned or pushed farther inward. When, due to consumption of earring material, the projecting part of the stick becomes shorter than desired, the anchor strip together with the rubber stick is pulled outward as far as suitable and. then, the anchor strip is pushed back again to the original position.
I desire it understood that my invention is not confined to the particular forms described, the same being merely illustrative, and may be carried out in other ways without departing from the spirit of the invention.
I claim:
1. An adjustable eraser comprising a tubular holder; 3, stick of erasing material inserted in one end of aid holder; and an anchor strip inserted at one side between the inner surface of said holder and said erasing stick, and irictionally engaging said stick the other sides of said stick touching said holder immediately whereby said stick can maintain its position relative to said holder while said anchor strip is inserted.
2. An adjustable eraser comprising a tubular holder having longitudinal grooves impressed in its wall; a stick of erasing material inserted in one end of said holder; and an anchor strip inserted between the inner surface of said holder and said erasing stick, said anchor strip having an outer surface curved correspondingly to the adjacent part of said grooved wall and having an inner surface frictionally engaging said stick.
3. An adjustable eraser comprising a tubular holder having a recess in the rim of one end; a stick of erasing material inserted in said end of said holder; and an anchor strip inserted between the inner surface of said holder and said erasing stick, frictionally engaging said stick and having a boss at one end, said boss extending laterally through said recess of said holder.
4. An adjustable eraser comprising a tubular holder; a stick of erasing material inserted in one end of said holder; and an anchor strip inserted at one side between the inner surface of said holder and said erasing stick, and having an uneven surface pressing into said stick the other sides of said stick touching said holder immediately whereby said stick can maintain its position relative to said holder while said anchor strip is inserted.
5. An adjustable eraser comprising a tubular holder; a stick of erasing material inserted in one end of aid holder; and an anchor strip inserted between the inner surface of said holder and said erasing stick, and having an uneven surface pressing into said stick and comprising depressions and projections alternating in longitudinal direction, the sides of said projections which are situated toward the outer end of the rubber stick being steeper than the sides situated toward the inner end of said stick.
6. An adjustable eraser comprising a tubular holder; a stick of erasing material inserted in one end of said holder; and an anchor strip inserted between the inner surface of said holder and said erasing stick, having an uneven surface pressing into said stick and having an inner end terminating in a thinned edge.
7. An adjustable eraser according to claim 3, further comprising a clip aflixed to said boss and having an end resiliently touching the outer sur- REFERENCES CITED The following references are of record in the file of this patent:
UNITED STATES PATENTS Number Name Date 2,115,806 Frederick May 3, 1938 1,373,062 Faber Mar. 29, 1921
US474870A 1942-01-30 1943-01-28 Adjustable eraser Expired - Lifetime US2417925A (en)

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CH2417925X 1942-01-30

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4979254A (en) * 1990-03-12 1990-12-25 Naujock Gordon L Eraser feeder
US5897266A (en) * 1996-11-27 1999-04-27 The Gillette Company Vent system for writing instrument
US6547465B1 (en) 2002-01-22 2003-04-15 Shoot The Moon Products Ii, Llc Pencil with exposable eraser

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1373062A (en) * 1920-09-24 1921-03-29 Eberhard Faber Pencil Company Eraser-holder
US2115806A (en) * 1937-08-17 1938-05-03 Frederick Charles Erasing device

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1373062A (en) * 1920-09-24 1921-03-29 Eberhard Faber Pencil Company Eraser-holder
US2115806A (en) * 1937-08-17 1938-05-03 Frederick Charles Erasing device

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4979254A (en) * 1990-03-12 1990-12-25 Naujock Gordon L Eraser feeder
US5897266A (en) * 1996-11-27 1999-04-27 The Gillette Company Vent system for writing instrument
US6547465B1 (en) 2002-01-22 2003-04-15 Shoot The Moon Products Ii, Llc Pencil with exposable eraser

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