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US 9,958,836 B2Granted
Dye-based time indicating label without initial gray time
AssigneeBrady Worldwide, Inc.
InventorsMatthew M. Kasper, Harry J. Miesner, Jr.
Life of this patent
Estimating the term…
Abstract
A dye-based, multilayer time-indicating label without initial gray time comprises a multilayer first part and a multilayer second part. The first part comprises a topsheet in contact with an enhancement layer and an optional reference layer, and the enhancement layer is in contact with a timing layer. The second part comprises a dye layer, an optional dark layer, and a substrate layer. The timing layer and the dye layer are separate from one another, and are optionally protected by one or more release liners. To activate the indicator, the timing and dye layers are separated from the one or more release liners and then joined to one another.
Claims13
An inactive multilayer time indicator comprising:
- (A) A multilayer first part comprising:
- (1) A transparent or translucent first substrate layer having opposing first and second facial surfaces;
- (2) A transparent or translucent enhancement layer having opposing first and second facial layers, the first facial surface of which is in contact with the second facial surface of the substrate layer;
- (3) An opaque timing layer having opposing first and second facial surfaces, the first facial surface of which is in contact with the second facial surface of the enhancement layer;
- and
- (B) A multilayer second part comprising:
- (1) A dye layer comprising a dye and having opposing first and second facial surfaces, and, under ambient conditions, the dye:
- (a) Will not migrate through the dark layer of (B)(2) below;
- and
- (b) Will migrate through the timing layer and into the enhancement layer after contact with the timing layer;
- and
- (2) A dark layer having:
- (a) Opposing first and second facial surfaces, the first facial surface of which is in contact with the second facial surface of the dye layer;
- and
- (b) An L* value of less than 70;
- and
- (3) A second substrate layer having opposing first and second facial surfaces, the first facial surface of which is in contact with the second facial surface of the dark layer;
- with the proviso that the dye of the second part is not in contact with the timing layer of the first part.
15 more elements
An inactive multilayer time indicator comprising:
- (A) A multilayer first part comprising:
- (1) A transparent or translucent first substrate layer having opposing first and second facial surfaces;
- (2) A transparent or translucent enhancement layer having opposing first and second facial layers, the first facial surface of which is in contact with the second facial surface of the substrate layer;
- (3) An opaque timing layer having opposing first and second facial surfaces, the first facial surface of which is in contact with the second facial surface of the enhancement layer;
- and
- (B) A multilayer second part comprising:
- (1) A dye layer comprising a dye and having opposing first and second facial surfaces, and, under ambient conditions, the dye will migrate through the timing layer and into the enhancement layer after contact with the timing layer;
- and
- (2) A second substrate layer having:
- (a) Opposing first and second facial surfaces, the first facial surface of which is in contact with the second facial surface of the dye layer;
- and
- (b) An L* value of less than 70;
- with the proviso that the dye of the second part is not in contact with the timing layer of the first part.
10 more elements
An activated, multilayer time indicator comprising:
- (A) A transparent or translucent first substrate layer having opposing first and second facial surfaces;
- (B) A transparent or translucent enhancement layer having opposing first and second facial layers, the first facial surface of which is in contact with the second facial surface of the substrate layer;
- (C) An opaque timing layer having opposing first and second facial surfaces, the first facial surface of which is in contact with the second facial surface of the enhancement layer;
- (D) A dye layer having opposing first and second facial surfaces, the first facial surface of which is in contact with the second facial surface of the timing layer and, under ambient conditions, the dye:
- (1) Will not migrate through the dark layer of (E) below;
- and
- (2) Will migrate through the timing layer and into the enhancement layer after contact with the timing layer;
- (E) A dark layer having:
- (1) Opposing first and second facial surfaces, the first facial surface of which is in contact with the migrating dye layer;
- and
- (2) An L* value of less than 70;
- and
- (F) A second substrate layer having opposing first and second facial surfaces, the first facial surface of which is in contact with the second facial surface of the dark layer.
10 more elements
Dependencies are inferred from the claim text.