Browse Prior Art Database

Constant Pressure Head Ink Supply

IP.com Disclosure Number: IPCOM000078696D
Original Publication Date: 1973-Feb-01
Included in the Prior Art Database: 2005-Feb-26
Document File: 2 page(s) / 40K

Publishing Venue

IBM

Related People

Greene, J: AUTHOR [+3]

Abstract

A substantially constant head self-replenishing ink supply for a printer includes a large diameter feeder tube 4 for high-surface tension inks, with angular cut ends 5, 6 at about 45 degrees. Surface tensions of 30 dynes/cm call for a 300 mil. I. D. Tube 4 is affixed to ink reservoir 7 and penetrates through top 8 of reservoir 7 to a selected distance from the bottom surface 9 of reservoir 7, for providing ink of constant-pressure head therein to flow from outlet line 10 connected to surface 9. A nonvented inverted upper ink supply bottle 11 filled with fluid ink 12 has a puncture type frangible seal 13, or resealable flap seal 14 at its lower end. Seal 14 is pushed aside as the bottle is pushed over end 5 of tube 4, with annular seal 17 sealing between the neck 18 of bottle 11 and tube 4.

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Constant Pressure Head Ink Supply

A substantially constant head self-replenishing ink supply for a printer includes a large diameter feeder tube 4 for high-surface tension inks, with angular cut ends 5, 6 at about 45 degrees. Surface tensions of 30 dynes/cm call for a 300 mil. I. D. Tube 4 is affixed to ink reservoir 7 and penetrates through top 8 of reservoir 7 to a selected distance from the bottom surface 9 of reservoir 7, for providing ink of constant-pressure head therein to flow from outlet line 10 connected to surface 9. A nonvented inverted upper ink supply bottle 11 filled with fluid ink 12 has a puncture type frangible seal 13, or resealable flap seal 14 at its lower end. Seal 14 is pushed aside as the bottle is pushed over end 5 of tube 4, with annular seal 17 sealing between the neck 18 of bottle 11 and tube 4.

Tube end 6 is always immersed in ink 12 and the angular cut provides for ink and air to pass smoothly through tube 4 without surging or severe bubbling, and sustains constant pressure in reservoir 7 until bottle 11 is exhausted. Ink flow is self-regulated. A vent hole 15 is provided in the upper portion of reservoir 7. Bottle 11 fills with air 16 as it empties.

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