# US 5,710,585 A · Ink source for an ink delivery system

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- Number: US 5,710,585 A
- Document ID: US5710585A
- Status: Granted
- Kind: A
- Application number: 08/434,641
- Filed: 1995-05-04
- Granted: 1998-01-20
- Earliest claimed: 1995-05-04
- Assignees: CalComp Inc.
- Inventors: Charles J. Sabonis; Stephen R. Boss
- Web page: https://patentgrep.com/patent/US5710585A

## CPC

- B41J 2/17523: {Ink connection}
- B41J: TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS

## Abstract

The bag includes a selected volume of gas having a selected volume of dead space. The dead space being provided to accommodate expansion of the gas in the event of atmospheric and temperature changes. The dead space is within a range of 9% to 9.5% of the combined volume of the bag. The selected volume of air is sufficient such that complete drainage of an ink supply line to the printhead is allowed.

## Claims

### Claim 1

An ink source for an ink delivery system for a printer having a print head comprising:
a flexible bag having a selected combined individual volume of ink and individual volume of gas therein, said selected individual volume of gas including a selected volume of dead space for accommodating expansion of said gas and ink in the event of atmospheric and temperature changes, said selected volume of said dead space being 9-9.5% of said combined volume of said bag.

### Claim 2

An ink source for an ink delivery system for a printer having a print head coupled to a flexible bag by at least one ink supply line comprising:
a flexible bag having a selected combined individual volume of ink and individual volume of gas therein, said selected individual volume of gas including a selected volume of air space for allowing complete drainage of said ink supply line and for preventing negative pressure upon such drainage.

### Claim 3 (depends on 2)

The ink source of claim 2 wherein said selected volume of said air space is 4-5% of said combined volume of said bag.