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Accumulator for Ink Supply System of an Ink Jet Printer

IP.com Disclosure Number: IPCOM000086422D
Original Publication Date: 1976-Sep-01
Included in the Prior Art Database: 2005-Mar-03
Document File: 2 page(s) / 36K

Publishing Venue

IBM

Related People

Baker, DL: AUTHOR [+3]

Abstract

Accumulators, also known as surge tanks, are used in ink supply systems to absorb pressure variations in the ink supplied to the ink jet nozzle, so that the constant jet stream flow is not disturbed by fluctuations in pressure in the ink supply system. An economical and highly reliable accumulator 10 comprises a pair of circular, thin, flexible metallic plates 11 and 12 bonded near the periphery to a flexible cylindrical side wall 13. Input tube 14 and exit tube 15 are sealed into openings in side wall 13 and extend into chamber 16.

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Accumulator for Ink Supply System of an Ink Jet Printer

Accumulators, also known as surge tanks, are used in ink supply systems to absorb pressure variations in the ink supplied to the ink jet nozzle, so that the constant jet stream flow is not disturbed by fluctuations in pressure in the ink supply system. An economical and highly reliable accumulator 10 comprises a pair of circular, thin, flexible metallic plates 11 and 12 bonded near the periphery to a flexible cylindrical side wall 13. Input tube 14 and exit tube 15 are sealed into openings in side wall 13 and extend into chamber 16.

When ink flows under pressure in the system, chamber 16 is filled with ink without air or other gas present. As pressure variations occur on the input side, accumulator 10 expands or contracts to absorb the variations without disturbing the pressure of ink in exit tube 16. With flexible plates 11 and 12 and flexible side wall 13, which provides rotational flexibilities to the plates around the edges, the stresses produced by the pressure variations is equally distributed between the center of the plates and the edges.

For example, in a preferred structure that withstands working pressure of about 100 psi and limits the pressure fluctuation below 0.2 psi when the volume change is about 0.00003 cubic inches, plates 11 and 12 were stainless steel with a thickness of 0.015 inch and a diameter of 1 inch. Sidewall 13 was a rubber structure giving rotational rigidity of 31 in-1b/rad/in....