Display sheet with a plurality of hourglass shaped capsules containing marking means responsive to external fields

Claim 2

An external field activated display sheet comprising: a plurality of generally spaced apart hourglass shaped capsules; each one of said plurality of hourglass shaped capsules having two opposed chambers separated by a neck portion; said opposed chambers being in communication with each other through said neck portion; each one of said plurality of hourglass shaped capsules being partially filled with marking means; and said marking means in each hourglass shaped capsule being responsive to an external field across its corresponding hourglass shaped capsule for movement from one chamber of hourglass shaped capsule through said neck portion into the other chamber of hourglass shaped capsule.

Claim 3

The external field activated display sheet recited in claim 1, wherein said external field is an electric field.

Claim 4

The external field activated display sheet recited in claim 1, wherein said marking means so constructed and arranged to remain in its corresponding chamber after removal of the external electric field.

Claim 5

The external field activated display sheet recited in claim 3, wherein said marking means is a dyed liquid.

Claim 6

The external field activated display sheet recited in claim 3, wherein said marking means is a pigmented liquid.

Claim 7

The external field activated display sheet recited in claim 3, wherein said marking means is a liquid metal.

Claim 8

The external field activated display sheet recited in claim 3, wherein the portion of each capsule which is not filled with marking means is filled with air.

Claim 9

The external field activated display sheet recited in claim 3, wherein the portion of each capsule which is not filled with marking means is filled with an inert gas.

Claim 10

The external field activated display sheet recited in claim 3, wherein the portion of each capsule which is not filled with marking means is filled with a liquid.

Claim 11

The external field activated display sheet recited in claim 9, wherein said liquid is a clear liquid.

Claim 12

The external field activated display sheet recited in claim 9, wherein said liquid is a colored liquid.

Claim 13

The external field activated display sheet recited in claim 1, wherein said external field is a magnetic field.

Claim 14

The external field activated display sheet recited in claim 12, wherein said marking means is a pigmented ferrofluids.

Claim 15

An external field activated display sheet comprising: a medial sheet having a plurality of cavities; said medial sheet having two opposing surfaces; a first sheet having a first surface and a second surface; a second sheet having a first surface and a second surface; said first surface of said first sheet and said first surface of said second sheet being bonded to a respective one of said two surfaces of said medial sheet; said first sheet and said second sheet each having a plurality of cavities each being larger than each of said plurality of cavities of said medial sheet; each of said plurality of cavities of said medial sheet being aligned to a corresponding cavity from said plurality of cavities of said first sheet and to a corresponding cavity from said plurality of cavities of said second sheet; each cavity of said first sheet with a corresponding cavity from said medial sheet and a corresponding cavity from said second sheet defining a generally hourglass shaped cavity; each of said cavities in said medial sheet defining a neck portion for one of said hourglass shaped cavities; a third sheet being bonded to said second surface of said first sheet to seal said cavities of said first sheet; said third sheet being transparent; each one of said plurality of hourglass shaped cavities being partially filled with a marking means; a fourth sheet being bonded to said second surface of said second sheet to seal said cavities of said second sheet; and said marking means in each of said hourglass shaped cavities being responsive to an external field across its corresponding hourglass shaped cavity for movement of said marking means from its corresponding cavity of said second sheet through said neck portion into its corresponding cavity of said tint sheet.

Claim 16

An external field activated display sheet comprising: a medial sheet having a plurality of cavities; said medial sheet having two opposing surfaces; a first sheet having a first surface and a second surface; a second sheet having a first surface and a second surface; said first surface of said first sheet and said first surface of said second sheet being bonded to a respective one of said two surfaces of said medial sheet; said first sheet and said second sheet each having a plurality of cavities each being larger than each of said plurality of cavities of said medial sheet; each of said plurality of cavities of said medial sheet being aligned to a corresponding cavity from said plurality of cavities of said first sheet and to a corresponding cavity from said plurality of cavities of said second sheet; each cavity of said first sheet with a corresponding cavity from said medial sheet and a corresponding cavity from said second sheet defining a generally hourglass shaped cavity; each of said cavities in said medial sheet defining a neck portion for one of said hourglass shaped cavities; a third sheet being bonded to said second surface of said first sheet to seal said cavities of said first sheet; said third sheet being transparent; each one of said plurality of hourglass shaped cavities being partially filled with a marking means; a fourth sheet being bonded to said second surface of said second sheet to seal said cavities of said second sheet; and said marking means in each of said hourglass shaped cavities being responsive to an external field across its corresponding hourglass shaped cavity for movement of said marking means from its corresponding cavity of said second sheet through said neck portion into its corresponding cavity of said tint sheet.

Claim 17

The external field activated display sheet recited in claim 14, wherein said medial sheet is opaque.

Claim 18

The external field activated display sheet recited in claim 15, wherein said external field is an electric field.

Claim 19

The external field activated display sheet recited in claim 16, wherein said marking means so constructed and arranged to remain in its corresponding chamber after removal of the external electric field.

Claim 20

The external field activated display sheet recited in claim 17, wherein said marking means is a dyed liquid.

Claim 21

The external field activated display sheet recited in claim 17, wherein said marking means is a pigmented liquid.

Claim 22

The external field activated display sheet recited in claim 17, wherein said marking means is a liquid metal.

Claim 23

The external field activated display sheet recited in claim 17, wherein the portion of each hourglass shaped cavity which is not filled with marking means is filled with air.

Claim 24

The external field activated display sheet recited in claim 21, wherein said medial sheet, said tint sheet and said second sheet each has a plurality of connected pores.

Claim 25

The external field activated display sheet recited in claim 17, wherein the portion of each hourglass shaped cavity which is not filled with marking means is filled with an inert gas.

Claim 26

The external field activated display sheet recited in claim 23, wherein said medial sheet, said first sheet and said second sheet each has a plurality of connected pores.

Claim 27

The external field activated display sheet recited in claim 17, wherein the portion of each hourglass shaped cavity which is not filled with marking means is filled with a liquid.

Claim 28

The external field activated display sheet recited in claim 25, wherein said liquid is a clear liquid.

Claim 29

The extreme field activated display sheet recited in claim 25, wherein said liquid is a colored liquid.

Claim 30

The external field activated display sheet recited in claim 14, wherein said fourth sheet is transparent.

Claim 31

The external field activated display sheet recited in claim 15, wherein said external field is a magnetic field.

Claim 32

The external field activated display sheet recited in claim 29, wherein said marking means is ferrofluids.

Claim 33

The external field activated display sheet recited in claim 30, wherein said remaining portion of said plurality of hourglass shaped cavities are filled with air.

Claim 34

The external field activated display sheet recited in claim 31, wherein said medial sheet, said first sheet and said second sheet each has a plurality of connected pores.

Claim 35

The external field activated display sheet recited in claim 29, wherein remaining portion of said plurality of hourglass shaped cavities are filled with an inert gas.

Claim 36

The external field activated display sheet recited in claim 33, wherein said medial sheet, said first sheet and said second sheet each has a plurality of connected pores.