Digital camera print roll with periodic anisotropic stiffness

• US 6,472,052 B1
• Filed: 07/10/1998
• Issued: 10/29/2002
• Est. Priority Date: 07/15/1997
• Status: Expired due to Term

• Current Assignee: Google LLC (Alphabet Inc.)
• Original Assignee: Silverbrook Research Pty Limited
• Inventors: Silverbrook, Kia
• Primary Examiner(s): Hess, Bruce H.
• Application Number:
  US09/112,744
• Time in Patent Office: 1,572 Days
• Field of Search: 428/166, 428/167, 428/174, 428/175, 428/182, 428/195, 428/156, 442/182, 442/189
• US Class Current: 428/195.1
• CPC Class Codes: B32B 2307/706 Anisotropic
• CPC Class Codes: B32B 2559/00 Photographic equipment or accessories
• CPC Class Codes: B32B 27/10 of paper or cardboard
• CPC Class Codes: B32B 3/30 characterised by a layer formed with recesses or projections, e.g. hollows, grooves, protuberances, ribs apertured layer B32B3/266; layer with cavities or internal voids B32B3/26
• CPC Class Codes: B41J 2/14427 Structure of ink jet print heads with thermal bend detached actuators
• CPC Class Codes: B41J 2/1623 bonding and adhesion
• CPC Class Codes: B41J 2/1626 etching
• CPC Class Codes: B41J 2/1628 dry etching
• CPC Class Codes: B41J 2/1629 wet etching
• CPC Class Codes: B41J 2/1631 photolithography
• CPC Class Codes: B41J 2/1632 machining
• CPC Class Codes: B41J 2/1635 dividing the wafer into individual chips
• CPC Class Codes: B41J 2/1637 molding
• CPC Class Codes: B41J 2/1639 sacrificial molding
• CPC Class Codes: B41J 2/1642 thin film formation by CVD [chemical vapor deposition]
• CPC Class Codes: B41J 2/1643 thin film formation by plating
• CPC Class Codes: B41J 2/1645 thin film formation by spincoating
• CPC Class Codes: B41J 2/1646 thin film formation by sputtering
• CPC Class Codes: B41J 2/1648 Production of print heads with thermal bend detached actuators
• CPC Class Codes: B41J 2/16585 for paper-width or non-reciprocating print heads
• CPC Class Codes: B41J 2/17503 : Ink cartridges
• CPC Class Codes: B41J 2/17513 : Inner structure
• CPC Class Codes: B41J 2/17596 : Ink pumps, ink valves
• CPC Class Codes: B41J 2002/041 : Electromagnetic transducer
• CPC Class Codes: B41J 2202/21 : Line printing
• CPC Class Codes: B41M 2205/12 : Preparation of material for subsequent imaging, e.g. corona treatment, simultaneous coating, pre-treatments
• CPC Class Codes: B41M 5/0035 : Uncoated paper paper making D21
• CPC Class Codes: B41M 5/0064 : on plastics, horn, rubber, or other organic polymers
• CPC Class Codes: B82Y 30/00 : Nanotechnology for materials or surface science, e.g. nanocomposites
• CPC Class Codes: D21H 27/14 : Paper having stable form or dimension; Curl-resistant paper anticoil photographic support G03C1/81
• CPC Class Codes: D21H 27/34 : Continuous materials, e.g. filaments, sheets, nets
• CPC Class Codes: G06F 21/79 : in semiconductor storage media, e.g. directly-addressable memories
• CPC Class Codes: G06F 21/86 : Secure or tamper-resistant housings
• CPC Class Codes: G06F 2221/2129 : Authenticate client device independently of the user
• CPC Class Codes: G06K 1/121 : by printing code marks applying code marks to labels B65C9/46; marking or coding completed packages B65B61/26
• CPC Class Codes: G06K 19/06037 : multi-dimensional coding
• CPC Class Codes: G06K 7/14 : using light without selection of wavelength, e.g. sensing reflected white light G06K7/10831 - G06K7/1097 take precedence
• CPC Class Codes: G06K 7/1417 : 2D bar codes
• CPC Class Codes: G11C 11/56 : using storage elements with more than two stable states represented by steps, e.g. of voltage, current, phase, frequency
• CPC Class Codes: H04N 1/2112 : using still video cameras
• CPC Class Codes: H04N 1/2154 : the still video camera incorporating a hardcopy reproducing device, e.g. a printer
• CPC Class Codes: H04N 2101/00 : Still video cameras
• CPC Class Codes: H04N 23/00 : Cameras or camera modules comprising electronic image sensors; Control thereof
• CPC Class Codes: H04N 5/2628 : Alteration of picture size, shape, position or orientation, e.g. zooming, rotation, rolling, perspective, translation
• CPC Class Codes: Y10T 428/24132 : including grain, strips, or filamentary elements in different layers or components parallel
• CPC Class Codes: Y10T 428/24479 : including variation in thickness
• CPC Class Codes: Y10T 428/2457 : Parallel ribs and/or grooves
• CPC Class Codes: Y10T 428/24628 : Nonplanar uniform thickness material
• CPC Class Codes: Y10T 428/24636 : Embodying mechanically interengaged strand[s], strand-portion[s] or strand-like strip[s] [e.g., weave, knit, etc.]
• CPC Class Codes: Y10T 428/24694 : Parallel corrugations
• CPC Class Codes: Y10T 428/24802 : Discontinuous or differential coating, impregnation or bond [e.g., artwork, printing, retouched photograph, etc.]
• CPC Class Codes: Y10T 428/249926 : Including paper layer
• CPC Class Codes: Y10T 428/249929 : Fibers are aligned substantially parallel
• CPC Class Codes: Y10T 428/249934 : Fibers are aligned substantially parallel
• CPC Class Codes: Y10T 428/249942 : Fibers are aligned substantially parallel
• CPC Class Codes: Y10T 428/249947 : Polymeric fiber

Abstract

Print media, when rolled tightly often produces a high degree of curl when removed from a roll form. The stiffer the media, the more likely the tendency to curl. On the other hand, print media that is too thin will be too floppy for conventional handling. The print media described is constructed from fine ribs of greater stiffness running along the axis of a roll. These ribs ideally have a pitch of approximately 200 microns and they can be either formed from embedded fibre of greater stiffness or through ridges of greater thickness. The ribs result in material of greater stiffness across the width of the media than along the length and maintain adequate stiffness for handling and viewing of the printed media.

Claims

1. A digital camera print roll of print media, the print media having a surface on which an image is to be printed by said digital camera, said print media having anisotropic stiffness which is provided by means of a periodic variation in stiffness of the print media in a direction normal to a rotational axis of the roll, the anisotropic stiffness reducing residual curl in the print media arising as a result of its having been stored in a rolled condition.

2. The roll of print media as claimed in claim 1 in which the stiffness is provided by a plurality of regularly spaced, parallel ribs extending parallel to the axis of the roll to provide greatest stiffness in a direction parallel to said axis of the roll.

3. The roll of print media as claimed in claim 2 in which the ribs are formed by pinching the print media in a corrugated roller.

4. The roll of print media as claimed in claim 2 in which the ribs are provided by a plurality of spaced fibers over which a print media-defining material is applied.

5. The roll of print media as claimed in claim 4 in which said fibers are formed by extrusion of a polymer through an extrusion die.

6. The roll of print media as claimed in claim 4 in which said fibers are formed of polyethylene napthalate.

7. The roll of print media as claimed in claim 1 in which a wavelength of said periodic variation is about 200 microns.