Incrementally stretched films with enhanced properties and methods for making the same
US-9216538-B2 · Dec 22, 2015 · US
Processes and apparatus for making transversely drawn films with substantially uniaxial character
US2016229111A1 · US · A1
| Field | Value |
|---|---|
| Publication number | US-2016229111-A1 |
| Application number | US-201615131283-A |
| Country | US |
| Kind code | A1 |
| Filing date | Apr 18, 2016 |
| Priority date | May 31, 2001 |
| Publication date | Aug 11, 2016 |
| Grant date | — |
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- Title
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Abstract
Official abstract text for this publication.
A roll of multilayer optical film is described. The roll includes a substantially uniaxially-oriented multilayer optical film, where at least one layer of the multilayer optical film has indices of refraction in a length direction and a thickness direction that are substantially the same, but substantially different from an index of refraction in a width direction.
First claim
Opening claim text (preview).
What is claimed is: 1 . A stretcher for processing a film, the stretcher comprising: means for receiving a film; means for grasping edge portions of the film; means for conveying the film in a machine direction; and means for moving the opposing edge portions along diverging, substantially parabolic paths to form a stretched film. 2 . An apparatus for processing a film, the apparatus comprising: conveying means for conveying a film along a machine direction within a stretching region of the apparatus, the conveying means comprising gripping means for holding opposing edge portions of the film, a portion of the conveying means providing diverging curvilinear paths to stretch the film; and isolated takeaway means for grasping opposing takeaway regions of the film and taking the film from the conveyor directly from the stretching region and conveying the film further along in the machine direction. 3 . The apparatus of claim 2 , further comprising slitting means for slitting a stretched portion of the film between the opposing edge portions and the opposing takeaway regions to form selvages.
Assignees
Inventors
Classifications
- B29C55/08Primary
transverse to the direction of feed · CPC title
Edge clamps · CPC title
- B29C55/00Primary
Shaping by stretching, e.g. drawing through a die; Apparatus therefor (B29C61/08 takes precedence) · CPC title
a shaping technique combined with cutting, e.g. in parts or slices combined with rearranging and joining the cut parts (for reinforced material B29C70/545; B29C49/4278, B29C51/268 take precedence) · CPC title
after shaping · CPC title
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Frequently asked questions
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- What does patent US2016229111A1 cover?
- A roll of multilayer optical film is described. The roll includes a substantially uniaxially-oriented multilayer optical film, where at least one layer of the multilayer optical film has indices of refraction in a length direction and a thickness direction that are substantially the same, but substantially different from an index of refraction in a width direction.
- Who is the assignee on this patent?
- 3M Innovative Properties Co
- What technology area does this patent fall under?
- Primary CPC classification B29C55/08. Mapped technology areas include Operations & Transport.
- When was this patent published?
- Publication date Thu Aug 11 2016 00:00:00 GMT+0000 (Coordinated Universal Time) (A1). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).