# US 8,783,814 B2 · Apparatus for sensing indicators

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- Number: US 8,783,814 B2
- Document ID: US8783814B2
- Status: Granted
- Kind: B2
- Application number: 13/714,213
- Filed: 2012-12-13
- Published: 2014-06-19
- Granted: 2014-07-22
- Earliest claimed: 2012-12-13
- Assignees: Hewlett-Packard Development Company, L.P.
- Applicants: Hewlett-Packard Development Company, L.P.
- Inventors: Mark L. Bradley; Timothy M. Souza
- Web page: https://patentgrep.com/patent/US8783814B2

## CPC

- B41J 29/42: Scales and indicators, e.g. for determining side margins
- B41J 11/0095: {Detecting means for copy material, e.g. for detecting or sensing presence of copy material or its leading or trailing end}
- B41J 11/46: by marks or formations on the paper being fed
- B41J: TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS

## Abstract

An apparatus for sensing indicators is disclosed herein. An example of the apparatus includes a roller over which a media passes, the roller including a first end that is dark in color and a second end that is light in color. The example of the apparatus also includes a sensor that is moveable between a first position over the first end of the roller and a second position over the second end of the roller. The sensor detects a first indicator on the media in the first position and a second indicator on the media in the second position. An example of a printing device is also disclosed herein. Modifications to and other examples of the apparatus for sensing and printing device are further disclosed herein.

## Claims

### Claim 1

An apparatus for sensing indicators, comprising:
a roller over which a media passes, the roller including a first end that is dark color and a second end that is light color; and
a sensor that is moveable between a first position over the first end of the roller and a second position over the second end of the roller, the sensor detecting a first indicator in the media in the first position and a second indicator on the media in the second position.

### Claim 2 (depends on 1)

The apparatus of claim 1, wherein the sensor is manually moveable between the first position and the second position.

### Claim 3 (depends on 1)

The apparatus of claim 1, further comprising a printing device.

### Claim 4 (depends on 1)

The apparatus of claim 1, wherein the roller helps to convey the media to a printing mechanism.

### Claim 5 (depends on 1)

The apparatus of claim 1, wherein the media is a web.

### Claim 6 (depends on 1)

The apparatus of claim 1, wherein the first indicator includes a plurality of apertures in the media.

### Claim 7 (depends on 6)

The apparatus of claim 6, further comprising a processor that counts the apertures in the media and utilizes this count to control processing of the media.

### Claim 8 (depends on 1)

The apparatus of claim 1, wherein the sensor detects the first indicator in the media in the first position based on light reflected from the first end of the roller adjacent the first indicator.

### Claim 9 (depends on 8)

The apparatus of claim 8, wherein the sensor transmits light toward the media in the first position.

### Claim 10 (depends on 1)

The apparatus of claim 1, wherein the sensor detects the second indicator on the media in the second position based on light reflected from the second indicator.

### Claim 11 (depends on 10)

The apparatus of claim 10, wherein the sensor transmits light toward the media in the second position.

### Claim 12

A printing device, comprising:
a printing mechanism that deposits printing composition on a media;
a roller including a first end that is dark in color and a second end that is light in color;
a support assembly adjacent the roller; and
a sensor moveably mounted on the support assembly between a first position over the first end of the roller and a second position over the second end of the roller, the sensor detecting a first indicator in the media in the first position and a second indicator on the media in the second position.

### Claim 13 (depends on 12)

The printing device of claim 12, wherein the media passes over the roller.

### Claim 14 (depends on 12)

The printing device of claim 12, wherein the support assembly includes a rail.

### Claim 15 (depends on 12)

The printing device of claim 12, wherein the roller helps to convey the media to a printing mechanism.

### Claim 16 (depends on 12)

The printing device of claim 12, wherein the media is a web.

### Claim 17 (depends on 12)

The printing device of claim 12, wherein the first indicator includes a plurality of apertures in the media.

### Claim 18 (depends on 17)

The printing device of claim 17, further comprising a processor that counts the apertures in the media and utilizes this count to control printing on the media by the printing mechanism.

### Claim 19 (depends on 12)

The printing device of claim 12, wherein the sensor detects the first indicator in the media in the first position based on light reflected from the first end of the roller adjacent the first indicator.

### Claim 20 (depends on 19)

The printing device of claim 19, wherein the sensor transmits light toward the media in the first position.

### Claim 21 (depends on 12)

The printing device of claim 12, wherein the sensor detects the second indicator on the media in the second position based on light reflected from the second indicator.

### Claim 22 (depends on 21)

The printing device of claim 21, wherein the sensor transmits light toward the media in the second position.