Source: https://patents.google.com/patent/US6474894B1/en
Timestamp: 2020-07-02 10:04:04
Document Index: 98047041

Matched Legal Cases: ['art 21', 'art 21', 'art 21', 'art 21', 'art 21', 'art 21']

US6474894B1 - Writing utensil with container for receiving temporarily writing liquid - Google Patents
Writing utensil with container for receiving temporarily writing liquid Download PDF
US6474894B1
US6474894B1 US09/965,331 US96533101A US6474894B1 US 6474894 B1 US6474894 B1 US 6474894B1 US 96533101 A US96533101 A US 96533101A US 6474894 B1 US6474894 B1 US 6474894B1
US09/965,331
Man-Wha Baik
Morris Pen Manufacturing Co Ltd
2001-06-29 Priority to KR01-19615 priority Critical
2001-06-29 Priority to KR2020010019615U priority patent/KR200249667Y1/en
2001-09-25 Application filed by Morris Pen Manufacturing Co Ltd filed Critical Morris Pen Manufacturing Co Ltd
2002-01-24 Assigned to MORRIS PEN MANUFACTURING CO., LTD. reassignment MORRIS PEN MANUFACTURING CO., LTD. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: BAIK, MAN-WHA
2002-11-05 Publication of US6474894B1 publication Critical patent/US6474894B1/en
Contacting flanges 21 a and 21 b are protrudingly formed around the outer surfaces of the top and bottom portions of the large diameter part 21. These contacting flanges 21 a and 21 b closely contact with the inner surface of the liquid reservoir 10 to maintain airtightness.
A plurality of liquid staying pieces 24 are formed between the upper and lower contacting flanges 21 a and 21 b on the outer periphery of the large diameter part 21 by splitting the large diameter part 21 in layers at a regular distance. Each gap 25 formed between the respective liquid staying pieces 24 provides a space for receiving temporarily the writing liquid overflowing from the liquid reservoir 10. Preferably, the height of the gap 25 is in the range of 0.2 to 0.6 mm.
A through-hole 26 is formed between the lower contacting flange 21 b and the lowermost liquid staying piece 24 at the wall of the large diameter part 21. Thus, the through-hole 26 communicates the lowermost liquid staying space 25 with the liquid supplying passage 23. The writing liquid oversupplied in the passage 23 flows in the lowermost liquid staying space 25 through the through-hole 26.
A tension generating space 29 is formed on the outer periphery of the large diameter part 21 diametrically opposite to the upward guiding slits 27. This tension generating space 29 is formed by cutting longitudinally the parts of the lower contacting flange 21 b and the liquid staying pieces 24 except for the uppermost staying piece. Above the tension generating space 29, a downward guiding slit 28 equal to the upward guiding slit 27 is formed at the uppermost liquid staying piece 24.
As a result, it is unnecessary to form additionally a passage for guiding the writing liquid staying in the spaces 25 toward the downward guiding slit 28. That is, since the writing liquid can easily flow toward the downward guiding slit 28 by passing through the space 25 between the uppermost staying piece 24 and the upper contacting flange 21 a, the structure of the liquid container 20 can be significantly simplified, which will be described in detail later.
Because of the rise in the inner pressure of the liquid reservoir 10 due to a rise in the inner temperature or an exterior shock, the writing liquid in the reservoir 10 may be oversupplied to the liquid supplying passage 23. The oversupplied liquid flows into the space 25 formed between the lower contacting flange 21 b and the lowermost staying piece 24 through the through-hole 26 formed at the large diameter part 21 of the liquid container 20, as shown by the direction of arrows in FIG. 4.
If the liquid is further oversupplied, the liquid reaches the liquid staying space 25 between the upper contacting flange 21 a and the uppermost staying piece 24, and then flows toward the downward guiding slit 28 formed at the uppermost staying piece 24 diametrically opposite to the upward guiding slits 27, as shown by the direction of arrows in FIG. 3. The liquid flows down along the downward guiding slit 28 and the downward guiding groove 31 formed between two downward guiding protrusions 30 in the tension generating space 29.
a liquid reservoir for storing a writing liquid;
a cylindrical liquid container including a large diameter part which is forcedly inserted into the liquid reservoir and a small diameter part which is integrally formed at a bottom end of the large diameter part, the large and small diameter parts being provided with a liquid supplying passage formed along the central axes of the large and small diameter parts;
a liquid conveying line, an upper portion of which is inserted in the liquid supplying passage and a lower portion of which is exposed outside of the liquid container;
a housing which is coupled to a bottom of the liquid reservoir and accommodates the liquid container and the liquid conveying line; and
a writing tip which is attached to a bottom of the housing,
wherein a plurality of liquid staying pieces are formed on the outer periphery of the large diameter part by splitting the large diameter part in layers at a regular distance, the liquid staying pieces providing spaces therebetween for receiving the writing liquid,
a through-hole is formed at a wall of the large diameter part for communicating the space between the lowermost liquid staying piece and the bottom end of the large diameter part with the liquid supplying passage,
upward guiding slits are formed vertically in a straight line at the liquid staying pieces,
a tension generating space is formed on the outer periphery of the large diameter part diametrically opposite to the upward guiding slits by cutting longitudinally the parts of the bottom end of the large diameter part and the liquid staying pieces except for the uppermost staying piece,
a pair of downward guiding protrusions are formed longitudinally in the tension generating space and provide a downward guiding groove therebetween, and
US09/965,331 2001-06-29 2001-09-25 Writing utensil with container for receiving temporarily writing liquid Expired - Fee Related US6474894B1 (en)
KR01-19615 2001-06-29
KR2020010019615U KR200249667Y1 (en) 2001-06-29 a pen
US6474894B1 true US6474894B1 (en) 2002-11-05
ID=27751792
US09/965,331 Expired - Fee Related US6474894B1 (en) 2001-06-29 2001-09-25 Writing utensil with container for receiving temporarily writing liquid
US (1) US6474894B1 (en)
EP1612056A2 (en) 2004-06-15 2006-01-04 Monami Co. Ltd. Writing instrument
US10611185B2 (en) * 2017-05-12 2020-04-07 Qingdao Changlong Stationery Co., Ltd. Liquid ink writing instrument
2001-09-25 US US09/965,331 patent/US6474894B1/en not_active Expired - Fee Related
RU2557524C2 (en) 2015-07-20 Refillable container for liquid
US6935730B2 (en) 2005-08-30 One-way valve, valve unit assembly, and ink cartridge using the same
DE60304349T2 (en) 2006-10-19 Balgsystem and associated part, pump and use method therefor
TW409101B (en) 2000-10-21 Direct liquid supply writing implement
US7513611B2 (en) 2009-04-07 Storage and ink refilling station for a cartridge of a printhead
JP4879731B2 (en) 2012-02-22 Vapor diffusion device
Owner name: MORRIS PEN MANUFACTURING CO., LTD., KOREA, REPUBLI
Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:BAIK, MAN-WHA;REEL/FRAME:012512/0878