# US 9,873,245 B2 · Operation of printing systems

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- Number: US 9,873,245 B2
- Document ID: US9873245B2
- Status: Granted
- Kind: B2
- Application number: 15/268,041
- Filed: 2016-09-16
- Published: 2017-01-12
- Granted: 2018-01-23
- Earliest claimed: 2016-09-16
- Assignees: Hewlett-Packard Development Company, L.P.
- Applicants: Hewlett-Packard Development Company, L.P.
- Inventors: Jacint Humet; Eduardo Amela; Jaime Fernandez; Marc Serra Vall
- Web page: https://patentgrep.com/patent/US9873245B2

## CPC

- B41J 2/04508: {aiming at correcting other parameters}
- B41J 2/04586: {controlling heads of a type not covered by groups B41J2/04575 - B41J2/04585, or of an undefined type}
- B41J 2/2103: {Features not dealing with the colouring process per se, e.g. construction of printers or heads, driving circuit adaptations}
- B41J 2/2114: {Ejecting specialized liquids, e.g. transparent or processing liquids (B41J2/211 takes precedence)}
- B41J 11/0015: {for treating before, during or after printing or for uniform coating or laminating the copy material before or after printing (selective coating B41J2/2114)}
- B41J: TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS

## Abstract

Operations of printing systems are disclosed. According to examples, a deposition sequence for depositing printing fluids onto a substrate location is dynamically controlled. Sub-groups of nozzles in nozzle arrays are selected according to the deposition sequence.

## Claims

### Claim 1

A printing system, comprising:
a printhead receiving assembly to receive a printhead including a first nozzle array arrangement for jetting a first printing fluid, a second nozzle array arrangement for jetting a second printing fluid, and a third nozzle array arrangement for jetting a third printing fluid; and
a processor to operate the first nozzle array arrangement, the second nozzle array arrangement, and the third nozzle array arrangement to deposit the first and the second printing fluids onto a swath of a substrate within a same pass of the printhead over the swath, and deposit the third printing fluid onto the swath within a different pass of the printhead over the swath after the substrate has advanced in relation to the printhead in a substrate advance direction perpendicular to a pass direction of the printhead.

### Claim 2 (depends on 1)

The printing system of claim 1, wherein the first and the second printing fluids are deposited quasi-simultaneously, and the third printing fluid is deposited non-quasi-simultaneously.

### Claim 3 (depends on 1)

The printing system of claim 1, wherein the first nozzle array arrangement and the second nozzle array arrangement are arranged parallel to each other with nozzles disposed in a non-staggered configuration.

### Claim 4 (depends on 1)

The printing system of claim 1, wherein the first printing fluid is an ink fluid and the second printing fluid is a treatment fluid.

### Claim 5 (depends on 4)

The printing system of claim 4, wherein the second nozzle array arrangement is for jetting a treatment fluid and includes at least one of a first array for ejecting a pre-treatment fluid or a second array for ejecting a post-treatment fluid.

### Claim 6 (depends on 5)

The printing system of claim 5, wherein the second nozzle array arrangement includes the first array and the second arrays, the first nozzle array arrangement being in-between the first array and the second arrays with respect to the substrate advance direction.

### Claim 7 (depends on 1)

The printing system of claim 1, wherein the printing system includes the printhead.

### Claim 8

A non-transitory computer-readable medium storing code executable by a processor to:
operate a first nozzle arrangement of a printhead jetting a first printing fluid and a second nozzle arrangement of the printhead jetting a second printing fluid to deposit the first and the second printing fluids onto a swath of a substrate within a same pass of the printhead over the swath; and
operate a third nozzle arrangement of the printhead jetting a third printing fluid to deposit the third printing fluid onto the swath within a different pass over the swath after the substrate has advanced in relation to the printhead in a substrate advance direction perpendicular to a pass direction of the printhead.

### Claim 9 (depends on 8)

The non-transitory computer-readable medium of claim 8, wherein the first and the second printing fluids are deposited quasi-simultaneously, and the third printing fluid is deposited non-quasi-simultaneously.

### Claim 10 (depends on 8)

The non-transitory computer-readable medium of claim 8, wherein the code is executable by the processor to further:
advance the substrate in relation to the printhead a substrate advance length along the substrate advance direction,
wherein the swath corresponds to a multiple of the substrate advance length.

### Claim 11 (depends on 8)

The non-transitory computer-readable medium of claim 8, wherein the code is executable by the processor to further:
define a time interval between deposition of the first and second printing fluids on the swath via a gap set between the first and second nozzle arrangements, the gap being in the substrate advance direction.

### Claim 12 (depends on 8)

The non-transitory computer-readable medium of claim 8, wherein
the first treatment nozzle array arrangement includes a nozzle array for ejecting a pre-treatment fluid, and
the pre-treatment fluid is deposited on a substrate location before ink is deposited on the substrate location.

### Claim 13 (depends on 8)

The non-transitory computer-readable medium of claim 8, wherein
the first treatment nozzle array arrangement includes a nozzle array for ejecting a post-treatment fluid; and
the post-treatment fluid and ink are deposited quasi-simultaneously on a substrate location.

### Claim 14

A method comprising:
operating a printhead for depositing ink and treatment on a substrate location according to a deposition sequence, the printhead including a first nozzle array arrangement for ejecting a first fluid onto a substrate location, and a second nozzle array arrangement for ejecting a second fluid onto the substrate location, comprising:
determining a deposition sequence for depositing the first and second fluids on the substrate location; and
operating a sub-group of nozzles in the first nozzle array arrangement and a sub-group of nozzles in the second treatment nozzle array arrangement according to the deposition sequence,
wherein the first and second fluids are quasi-simultaneously deposited onto a swath of the substrate within a same pass of the printhead over the swath.

### Claim 15 (depends on 14)

The print method of claim 14, wherein deposition sequence is further for depositing a third fluid ejected by a third nozzle array arrangement of the printing arrangement on the substrate location, and wherein operating the printhead further comprises:
operating a sub-group of nozzles in the third nozzle array arrangement according to the deposition sequence,
wherein the third fluid is non-quasi-simultaneously deposited onto the swath of the substrate within a different pass of the printhead over the swath.

### Claim 16 (depends on 14)

The print method of claim 14, wherein the sub-groups define print swaths corresponding to a multiple of a substrate advance length.

### Claim 17 (depends on 14)

The print method of claim 14, wherein the sub-groups define a gap between the sub-groups along the substrate advance direction, the gap width being chosen to define a time interval between deposition of the first and second fluids on the substrate location.

### Claim 18 (depends on 14)

The print method of claim 14, wherein depositing the second fluid comprises at least one of:
ejecting fixer to facilitate fixing of the first fluid onto the substrate via a nozzle array of the second nozzle array arrangement, or
ejecting a post-treatment fluid to so as to form a coating on the first fluid deposited onto the substrate via a nozzle array of the second nozzle array arrangement.