Document scanner for scanning books

• US 7,268,923 B2
• Filed: 02/28/2003
• Issued: 09/11/2007
• Est. Priority Date: 02/28/2003
• Status: Active Grant

• Current Assignee: Hewlett-Packard Development Company, L.P. (HP Inc.)
• Original Assignee: Hewlett-Packard Development Company, L.P. (HP Inc.)
• Inventors: Schroath, Leonard, Anderson, Brad, Johnson, Bruce L., Herrmann, Bill
• Primary Examiner(s): Grant, Jerome
• Assistant Examiner(s): Safaipour, Houshang
• Application Number:
  US10/376,432
• Publication Number:
  US 20040169894A1
• Time in Patent Office: 1,656 Days
• Field of Search: 358/474, 358/497, 358/493, 399/362, 399/379, 399/380
• US Class Current: 358/474
• CPC Class Codes: H04N 1/1013 with sub-scanning by translatory movement of at least a part of the main-scanning components H04N1/107 takes precedence
• CPC Class Codes: H04N 1/1026 using a belt or cable
• CPC Class Codes: H04N 1/103 by engaging a rail
• CPC Class Codes: H04N 1/1043 of a sensor array
• CPC Class Codes: H04N 1/1061 Details relating to flat picture-bearing surfaces, e.g. transparent platen
• CPC Class Codes: H04N 2201/0434 specially adapted for scanning pages of a book

Abstract

A document scanner for scanning an open book includes a housing and a wedge-shaped transparent platen supported by the housing. The platen defines an upper surface configured to support a book in a face-down position, and a lower surface opposite the upper surface. The platen includes a first platen portion and a second platen portion joined at a vertex to thereby define the wedge-shape of the platen. The document scanner further includes a scan head moveably supported by the housing. The scan head is configured to move generally parallel to the first platen portion and the second platen portion.

Claims

1. A document scanner for scanning an open book, comprising:

a housing;

a wedge-shaped transparent platen supported by the housing and defining an upper surface configured to support a book in a face-down position, the platen further defining a lower surface opposite the upper surface, the platen comprising a first platen portion and a second platen portion joined at a vertex to thereby define the wedge-shape of the platen; and

a scan head moveably supported by the housing, the scan head being configured to move generally parallel to the first platen portion and the second platen portion;

and wherein the scan head is further configured to move firstly generally parallel to the first platen portion in a first direction, and then, after moving past the vertex of the platen, to move secondly generally parallel to the second platen portion in a second direction.

2. The document scanner of claim 1, and wherein:

the platen defines a first end and a second end, and the platen is supported by the housing at the first and second ends of the platen;

the vertex of the platen is generally parallel to the first and second ends of the platen; and

the scan head is generally linear in shape, and is aligned generally parallel to the first and second ends of the platen.

3. A document scanner for scanning an open book, comprising:

a housing;

a wedge-shaped transparent platen supported by the housing and defining an upper surface configured to support a book in a face-down position, the platen further defining a lower surface opposite the upper surface, the platen comprising a first platen portion and a second platen portion joined at a vertex to thereby define the wedge-shape of the platen; and

a scan head moveablv supported by the housing, the scan head being configured to move aenerallv parallel to the first platen portion and the second platen portion;

and further comprising a scan head track supported by the housing and configured to moveably support the scan head, the scan head track comprising a first track portion, a second track portion, and a curved track vertex portion, and wherein;

the first and second track portions are joined together by the curved track vertex portion; and

the first and second track portions are generally parallel to the respective first and second platen portions.

4. The document scanner of claim 3, and further comprising a scan head drive assembly supported by the housing and configured to move the scan head generally parallel to the first and the second platen portions.

5. The document scanner of claim 4, and wherein the drive assembly comprises a drive cable generally arranged in a triangular shape, wherein a first and a second side of the triangle are generally parallel to the respective first and second track portions.

6. A document scanner, comprising:

a housing;

a transparent platen supported by the housing and defining an upper surface and a lower surface, the platen comprising a first platen portion, a second platen portion, and a platen vertex hinge, and wherein each platen portion defines a mating edge, and the first and second platen portions are joined at the mating edges by the platen vertex hinge to thereby allow the mating edges of the first and second platen portions to move generally upward and away from the housing;

a scan head moveably supported by the housing and configured to move generally parallel to the lower surface of the platen;

a scan head track supported by the housing and conflaured to moveably support the scan head, the scan head track comprising a first track portion, a second track portion, and a track hinge joining the first and second track portions;

wherein the platen first portion is defined by a first edge, the platen further comprising a first platen portion hinge which hinges the first platen portion at the first edae to the housing;

wherein the second platen portion is defined by a second edge which is opposite the first edge, the document scanner further comprising a platen track configured to moveably support the second platen portion at the second edge;

and further comprising a platen lock configured to secure the second edge of the second platen portion relative to the platen track.

7. A document scanner, compnsing:

a housing;

a transparent platen supported by the housing and defining an upper surface and a lower surface, the platen comprising a first platen portion, a second platen portion, and a platen vertex hinge, and wherein each platen portion defines a mating edge, and the first and second platen portions are joined at the mating edaes by the platen vertex hinge to thereby allow the mating edaes of the first and second platen portions to move generally upward and away from the housing;

a scan head moveably supported by the housing and configured to move generally parallel to the lower surface of the platen;

a scan head track supported by the housing and configured to moveably support the scan head, the scan head track comprising a first track portion, a second track portion, and a track hinge joining the first and second track portions;

wherein the platen first portion is defined by a first edge, the platen further comprising a first platen portion hinge which hinges the first platen portion at the first edge to the housing;

wherein the second platen portion is defined by a second edge which is opposite the first edge, the document scanner further comprising a platen track configured to moveably support the second platen portion at the second edge;

and further comprising a platen release supported by the housing and configured to exert a force on the lower surface of the platen proximate the platen vertex hinge to thereby urge the first and second platen portions away from the housing when the first and second platen portions are arranged in a generally flat plane relative to one another.

8. A document scanner, comprsing;

a housing;

a transparent platen supported by the housing and defining an upper surface and a lower surface, the platen comprising a first platen portion, a second platen portion, and a platen vertex hinge, and wherein each platen portion defines a mating edge, and the first and second platen portions are joined at the mating edges by the platen vertex hinge to thereby allow the mating edoes of the first and second platen portions to move generally upward and away fmm the housing;

a scan head moveably supported by the housing and configured to move generally parallel to the lower surface of the platen;

a scan head track supported by the housing and configured to moveably support the scan head, the scan head track comprising a first track portion, a second track portion, and a track hinge joining the first and second track portions;

wherein the platen first portion is defined by a first edge, the platen further comprising a first platen portion hinge which hinges the first platen portion at the first edge to the housing;

wherein the second platen portion is defined by a second edge which is opposite the first edge, the document scanner further comprising a platen track configured to moveably support the second platen portion at the second edge;

and further comprising a connecting link connecting the platen vertex hinge to the track hinge.

9. A document scanner, comprising:

a housing;

a transparent platen supported by the housing and defining an upper surface and a lower surface, the platen comprising a first platen portion, a second platen portion, and a platen vertex hinge, and wherein each platen portion defines a mating edge, and the first and second platen portions are joined at the mating edges by the platen vertex hinge to thereby allow the matin edges of the first and second platen portions to move generally upward and away from the housing;

a scan head moveably supported by the housing and configured to move generally parallel to the lower surface of the platen; and

a scan head track supported by the housing and configured to moveably support the scan head, the scan head track comprising a first track portion, a second track portion, and a track hinge joining the first and second track portions;

a scan head drive assembly supported by the housing and conflaured to move the scan head along the scan head track;

and wherein the scan head drive assembly comprises;

a drive cable which is engaged by the scan head, the drive cable defining first and second cord lengths;

a first idler in contact with the first cord length;

a second idler in contact with the second cord length; and

an idler arm supporting the first and second idlers in spaced-apart relationship to thereby hold the first and second cord lengths in spaced-apart relationship, and wherein the idler arm is connected to at least one of the platen vertex hinge or the track hinge.

10. A document scanner, comprising:

a housing;

a transparent platen supported by the housing and defining an upper surface and a lower surface, the platen comprising a first platen portion, a second platen portion, and a platen vertex hinge, and wherein each platen portion defines a mating edge, and the first and second platen portions are joined at the mating edges by the platen vertex hinge to thereby allow the mating edges of the first and second platen portions to move generally upward and away from the housing;

a scan head moveably supported by the housing and conflaured to move generally parallel to the lower surface of the platen; and

a scan head track supported by the housing and configured to moveably support the scan head, the scan head track comprising a first track portion, a second track portion and a track hinge joining the first and second track portions;

and further comprising a deployable light seal configured to be deployed as the mating edges of the first and second platen portions move in an upward direction away from the housing and to fill a generally triangular shaped open area defined by the first and second platen portions and the housing as the mating edges of the first and second platen portions move in an upward direction away from the housing.

11. The document scanner of claim 10, and wherein the light seal comprises a plurality of overlapping shutters.

12. A document scanner, comprising:

a housing;

interchangeable transparent first and second platens each platen configured to be supported by the housing;

a scan head moveably supported by the housing;

a scan head track supported by the housing and configured to moveably support the scan head, the scan head track comprising a first track portion, a second track portion, and a track hinge joining the first and second track portions; and

wherein;

the first platen is a generally flat planar platen; and

the second platen is a generally wedge-shaped platen;

and wherein the scan head drive assembly comprises;

a drive cable which is engaged by the scan head, the drive cable defining first and second cord lengths;

a first idler in contact with the first cord length;

a second idler in contact with the second cord length; and

an idler arm supporting the first and second idlers in spaced-apart relationship to thereby hold the first and second cord lengths in spaced-apart relationship, and wherein the idler arm is connected to the track hinge.

13. The document scanner of claim 12, and further comprising a scan head track actuator connected to the track hinge to allow a user to move the track head hinge in a generally upward direction, thereby placing the first and second track portions in a generally inverted “

SI”

position relative to another.