US4535050A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Peeling development of photosensitive materials employing microencapsulated radiation sensitive compositions
Assignee: Mead Corp
•
Filing: 1983-07-18
•
Granted: 1985-08-13
•
Expires: 2003-07-18
Abstract
Abstract An improved means for exposing and developing photosensitive sheets employing a microencapsulated radiation sensitive composition wherein a cover sheet is adhered to a layer of the microcapsules and following exposure the cover sheet is peeled away to rupture the microcapsules and develop the image. The cover sheet also reduces the oxygen concentration at the surface of the microcapsules and thereby enhances the sensitivity of the imaging sheet.
Inventors
- 👤 Paul C. Adair
- 👤 David G. Adkins
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 23:23
CPC Classifications
G; G03; G03F; G03F7/00; G03F7/002; Y; Y10; Y10T; Y10T428/00; Y10T428/249921; Y10T428/249994; Y10T428/249995; Y10T428/249997
Claims Analysis
Total Claims: 31
Claim 1
Independent Claim
105 words
An imaging sheet comprising: a support, a layer of microcapsules on said support, said microcapsules containing an internal phase including a radiation sensitive composition which undergoes a change in viscosity upon exposure to actinic radiation and an image-forming agent, and a strippable cover sheet formed from a material transparaent to said actinic radiation, said cover sheet being uniformly adhered to said layer of microcapsules prior to exposure, wherein said imaging sheet is useful in forming images by image-wise exposing said imaging sheet to actinic radiation and separating said cover sheet from said layer of microcapsules, whereby said microcapsules rupture and image-wise release said image-forming agent.
Claim 2
Dependent Claim
105 words
An imaging sheet comprising: a support, a layer of microcapsules on said support, said microcapsules containing an internal phase including a radiation sensitive composition which undergoes a change in viscosity upon exposure to actinic radiation and an image-forming agent, and a strippable cover sheet formed from a material transparaent to said actinic radiation, said cover sheet being uniformly adhered to said layer of microcapsules prior to exposure, wherein said imaging sheet is useful in forming images by image-wise exposing said imaging sheet to actinic radiation and separating said cover sheet from said layer of microcapsules, whereby said microcapsules rupture and image-wise release said image-forming agent.
Claim 3
Dependent Claim
17 words
The imaging sheet of claim 1 wherein said radiation sensitive composition is a photohardenable or photosoftenable composition.
Claim 4
Dependent Claim
16 words
The imaging sheet of claim 2 wherein said radiation sensitive composition includes an ethylenically unsaturated compound.
Claim 5
Dependent Claim
12 words
The imaging sheet of claim 3 wherein said microcapsules have discrete walls.
Claim 6
Dependent Claim
23 words
The imaging sheet of claim 4 wherein said cover sheet is adhered to said layer of capsules by a layer of an adhesive.
Claim 7
Dependent Claim
14 words
The imaging sheet of claim 5 wherein said image-forming agent is a color former.
Claim 8
Dependent Claim
25 words
The imaging sheet of claim 6 wherein said imaging sheet further comprises a developer material present on the same support as said layer of microcapsules.
Claim 9
Dependent Claim
52 words
The imaging sheet of claim 6 wherein said imaging sheet is useful in forming images in a transfer process wherein a developer material is present on a support separate and distinct from said support carrying said layer of microcapsules and said color former is transferred from said imaging sheet to said developer.
Claim 10
Dependent Claim
24 words
The imaging sheet of claim 7 wherein said developer material is provided as a layer interposed between said layer of microcapsules and said support.
Claim 11
Dependent Claim
15 words
The imaging sheet of claim 1 wherein said cover sheet is substantially impermeable to oxygen.
Claim 12
Dependent Claim
26 words
The imaging sheet of claim 7, wherein said color former is a substantially colorless electron donating compound and said developer material is an electron accepting compound.
Claim 13
Dependent Claim
26 words
The imaging sheet of claim 8 wherein said color former is a substantially colorless electron donating compound and said developer material is an electron accepting compound.
Claim 14
Dependent Claim
15 words
The imaging sheet of claim 3 wherein said radiation sensitive composition additionally comprises a photoinitiator.
Claim 15
Dependent Claim
127 words
An imaging sheet comprising: a support, a layer of microcapsules on said support, said microcapsules having discrete microcapsule walls and containing a radiation sensitive composition and a color former in the internal phase, said radiation sensitive material including an ethylenically unsaturated compound and a photoinitiator such that said radiation sensitive material undergoes an increase in viscosity upon exposure to actinic radiation, and a strippable cover sheet formed from a material transparent to said actinic radiation, said cover sheet being uniformly adhered to said layer of microcapsules prior to exposure, wherein said imaging sheet is useful in forming images by image-wise exposing said imaging sheet to actinic radiation and separating said cover sheet from said layer of microcapsules whereby said microcapsules rupture and image-wise release said color former.
Claim 16
Dependent Claim
127 words
An imaging sheet comprising: a support, a layer of microcapsules on said support, said microcapsules having discrete microcapsule walls and containing a radiation sensitive composition and a color former in the internal phase, said radiation sensitive material including an ethylenically unsaturated compound and a photoinitiator such that said radiation sensitive material undergoes an increase in viscosity upon exposure to actinic radiation, and a strippable cover sheet formed from a material transparent to said actinic radiation, said cover sheet being uniformly adhered to said layer of microcapsules prior to exposure, wherein said imaging sheet is useful in forming images by image-wise exposing said imaging sheet to actinic radiation and separating said cover sheet from said layer of microcapsules whereby said microcapsules rupture and image-wise release said color former.
Claim 17
Dependent Claim
21 words
The imaging sheet of claim 14 wherein said cover sheet is adhered to said microcapsules by a layer of an adhesive.
Claim 18
Dependent Claim
14 words
The imaging sheet of claim 14 wherein said cover sheet is substantially oxygen impermeable.
Claim 19
Dependent Claim
17 words
The imaging sheet of claim 14 wherein said color former is a substantially colorless electron donating compound.
Claim 20
Dependent Claim
34 words
The imaging sheet of claim 17 wherein said sheet further comprises a layer of a developer material interposed between said support and said layer of microcapsules so as to provide a self-contained imaging sheet.
Claim 21
Dependent Claim
38 words
The imaging sheet of claim 14 wherein a developer material is provided on a support separate and distinct from said support carrying said microcapsules so as to provide in combination with said imaging sheet a transfer imaging system.
Claim 22
Dependent Claim
96 words
A process for imaging which comprises: image-wise exposing an imaging sheet comprising a support having on one surface thereof a layer of microcapsules containing a radiation sensitive composition which undergoes a change in viscosity upon exposure to actinic radiation and an image-forming agent in the internal phase, said imaging sheet having a strippable cover sheet uniformly adhered to said layer of microcapsules prior to exposure, said cover sheet being substantially transparent to actinic radiation, and separating said strippable cover sheet from said layer of microcapsules and thereby rupturing said microcapsules and image-wise releasing said image-forming agent.
Claim 23
Dependent Claim
96 words
A process for imaging which comprises: image-wise exposing an imaging sheet comprising a support having on one surface thereof a layer of microcapsules containing a radiation sensitive composition which undergoes a change in viscosity upon exposure to actinic radiation and an image-forming agent in the internal phase, said imaging sheet having a strippable cover sheet uniformly adhered to said layer of microcapsules prior to exposure, said cover sheet being substantially transparent to actinic radiation, and separating said strippable cover sheet from said layer of microcapsules and thereby rupturing said microcapsules and image-wise releasing said image-forming agent.
Claim 24
Dependent Claim
36 words
The process of claim 20 wherein said image-forming agent is a color former, and a developer material is associated with said imaging sheet such that it reacts with said color former to form a color image.
Claim 25
Dependent Claim
43 words
The process of claim 21 wherein said developer material is present on the same support as the support carrying said layer of microcapsules such that, upon separating said cover sheet, said color former reacts with said developer material and forms a color image.
Claim 26
Dependent Claim
65 words
The process of claim 21 wherein said developer material is present support separate and distinct from said support carrying said layer of microcapsules and said process further comprises contacting said imaging sheet with said developer sheet after separating said cover sheet from said layer of microcapsules, such that said color former is transferred to said developer material where it reacts and produces a color image.
Claim 27
Dependent Claim
111 words
A process for imaging which comprises: image-wise exposing an imaging sheet including a support having a layer of microcapsules on the surface thereof, said microcapsules having discrete walls and containing a radiation sensitive composition which undergoes a change in viscosity upon exposure to actinic radiation and an image-forming agent, and a strippable cover sheet fromed from a material transparent to said actinic radiation, said cover sheet carrying a layer of adhesive on one surface thereof and being uniformly adhered to said layer of microcapsules by said adhesive prior to exposure, and separating said cover sheet from said layer of microcapsules and thereby rupturing said microcapsules and image-wise releasing said image-forming agent.
Claim 28
Dependent Claim
111 words
A process for imaging which comprises: image-wise exposing an imaging sheet including a support having a layer of microcapsules on the surface thereof, said microcapsules having discrete walls and containing a radiation sensitive composition which undergoes a change in viscosity upon exposure to actinic radiation and an image-forming agent, and a strippable cover sheet fromed from a material transparent to said actinic radiation, said cover sheet carrying a layer of adhesive on one surface thereof and being uniformly adhered to said layer of microcapsules by said adhesive prior to exposure, and separating said cover sheet from said layer of microcapsules and thereby rupturing said microcapsules and image-wise releasing said image-forming agent.
Claim 29
Dependent Claim
36 words
The process of claim 24 wherein said image-forming agent is a color former and developer material is associated with said imaging sheet such that it reacts with said released color former to form a color image.
Claim 30
Dependent Claim
42 words
The process of claim 25 wherein said developer material is present on the same support as the support carrying said layer of microcapsules such that, upon separating said cover sheet, said color former reacts with said developer material and forms an image.
Claim 31
Dependent Claim
67 words
The process of claim 25 wherein said developer material is present on a support separate and distinct from said support carrying said layer of microcapsules and said process further comprises contacting said imaging sheet with said developer sheet after separating said cover sheet from said layer of microcapsules such that said color former is transferred to said developer material where it reacts and produces a color image.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-08-12 | 1989-02-11 | 1989-08-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-08-12 | 1993-02-11 | 1993-08-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-08-12 | 1997-02-11 | 1997-08-13 | $7700.00 | Window Closed / Lapsed |