1. A temperature sensor comprising:
a temperature-sensitive element; and
a peripheral envelope for receiving the temperature-sensitive element comprising a closed end, the peripheral envelope configured to be inserted into a corresponding cavity,
wherein the closed end of the peripheral envelope has a peripheral portion revealing at an end of the closed end a flexible assembly stop after said peripheral portion, wherein said stop deforms toward the peripheral portion by shape cooperation with a bottom of the corresponding cavity.
2. The temperature sensor according to claim 1, wherein the flexible assembly stop is disc-shaped.
3. The temperature sensor according to claim 1, wherein the peripheral portion has a frustoconical shape.
4. The temperature sensor according to claim 1, wherein the flexible assembly stop and the peripheral portion of the peripheral envelope are formed in one piece.
5. The temperature sensor according to claim 1, wherein the peripheral envelope is metal.
6. The temperature sensor according to claim 1, wherein the temperature-sensitive element is a PTC (positive temperature coefficient) or NTC (negative temperature coefficient) type thermistor.
7. A method of manufacturing a temperature sensor according to claim 2, comprising: producing the flexible assembly stop and the peripheral portion by turning to machine a groove of triangular section in the peripheral envelope.
8. A method of assembling a temperature sensor into a corresponding cavity, the temperature sensor comprising a temperature-sensitive element and a peripheral envelope receiving the temperature-sensitive element at a closed end, the peripheral envelope being inserted in said cavity, the method comprising:
assembling said sensor into the corresponding cavity so as to position a flexible assembly stop of the closed end of the peripheral envelope facing a bottom of the corresponding cavity,
deforming projecting walls of the flexible assembly stop at least partially in the direction of a peripheral portion of said end of the peripheral envelope by shape cooperation between said stop and the bottom of said corresponding cavity.
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.
1. A composition of an ink for ink jet printing, comprising water, a humectant, a soluble dye and a non-ionic surfactant, wherein said ink composition is of the slow rearrangement type, and wherein said surfactant comprises an ethoxylated alcohol.
2. The composition of claim 1 wherein said ethoxylated alcohol is present in the ink in a percentage between 0.1% and 5% by weight.
3. A composition of an ink for ink jet printing, comprising water, a humectant, a soluble dye and a non-ionic surfactant, wherein said ink composition is of the slow rearrangement type, and wherein said surfactant comprises an ethoxy-propoxylated alcohol.
4. The composition of claim 3, wherein said ethoxy-propoxylated alcohol is present in the ink in a percentage between 0.1% and 5% by weight.
5. The composition of claim 1, wherein said humectant consists of a main humectant and a secondary humectant.
6. The composition of claim 5, wherein said main humectant is selected from the group consisting of 2-pyrrolidone, pentanediol, 1,1,1,tris(hydroxymethyl)-propane, and 1,3 dimethyl-2-imidazoledinone.
7. The composition of claim 6, wherein said main humectant is present in a percentage between 5 and 30% by weight.
8. The composition of claim 5, wherein said secondary humectant is 2-(2-butoxymethoxy)ethanol.
9. The composition of claim 8, wherein said secondary humectant is present in a percentage ranging from 1% to 10% by weight.
10. The composition of claim 1, wherein said dye is selected from the group consisting of Food Black 2, a mix of azoic dyes, Direct Black 168 and Direct Black 195 for the black inks and the dyes Direct Blue 86, Direct Blue 199, Acid Blue 9, Acid Yellow 23, Direct Yellow 86, Acid Red 52 and Acid Red 249 for the colour inks and mixtures thereof.
11. The composition of claim 10, wherein said dye is present in a percentage between 0.1% and 10% by weight.
12. The composition of claim 1, further comprising a pH regulator system, wherein said regulator system is selected from the group consisting of phosphates, borates, carbonates, sodium acetates, potassium acetates and ammonium acetates, and a mixtures thereof.
13. The composition of claim 1, further comprising a biocide system, wherein said biocide system is selected from the group consisting of a mixture of semiformal glycols and isothiazolinones, 1,2-benzoisothioazolin-3-one, and mixtures thereof.
14. A method of preparing a composition of an ink according to claim 1, said method comprising the steps of:
adding to the humectant or to the humectants a small amount of deionized water and mixing with the surface-active agent;
mechanically agitating the mix obtained for a time of between 5 and 10 minutes at room temperature; and
adding the other components of the composition.
15. The composition of claim 1 wherein said ink possesses the following properties:
pH between 7.5 and 9;
viscosity \u03b7 between 1.2 and 5 mPa*s @ 25\xb0 C.; and
surface tension \u03c4 between 20 and 50 mNm @ 25\xb0 C.
16. A thermal ink jet printhead, comprising a tank containing an ink having the composition of claim 1.
17. An ink tank for refillable printheads for thermal ink jet printing, wherein said ink tank contains ink having the composition of claim 1.
18. A thermal ink jet printing process comprising the steps of:
having a printhead comprising a tank containing an ink having the composition of claim 1, and
using said printhead on a thermal ink jet printer to deposit droplets of said ink on a medium.
19. The composition of claim 1, wherein said ethoxylated alcohol is a primary ethoxylated alcohol comprising an alkyl chain with 11 carbon atoms and 7 ethoxy units.
20. The composition of claim 2, wherein said ethoxylated alcohol is present in the ink in an amount from 0.1% to 3% by weight.
21. The composition of claim 3, wherein said ethoxy-propoxylated alcohol comprises an alkyl chain with 12 to 14 carbon atoms, 7 ethoxy units, and 4.5 propoxy units.
22. The composition of claim 4, wherein said ethoxy-propoxylated alcohol is present in the ink in an amount from 0.1% to 3% by weight.
23. The composition of claim 7, wherein said main humectant is present in the ink in an amount from 10 to 20% by weight.
24. The composition of claim 9, wherein said secondary humectant is present in the ink in an amount from 1% to 5% by weight.
25. The composition of claim 11, wherein said dye is present in the ink in an amount from 0.1% to 5% by weight.
26. An ink composition for a high droplet ejection frequency printing system, said composition comprising water, a humectant, a soluble dye, and a non-ionic surfactant comprising an ethoxylated alcohol or an ethoxy-propoxylated alcohol, wherein said ink composition is of a slow rearrangement type such that its dynamic surface tension is maintained with a slow dynamic rearrangement pattern.
27. The composition of claim 26, wherein said surfactant is present in the ink composition in an amount from 1% to 3% by weight.
28. The composition of claim 26, wherein said surfactant comprises an ethoxylated alcohol comprising an alkyl chain with 11 carbon atoms and 7 ethoxy units.
29. The composition of claim 26, wherein said surfactant comprises an ethoxy-propoxylated alcohol comprising an alkyl chain with 12 to 14 carbon atoms, 7 ethoxy units and 4.5 propoxy units.
30. A thermal ink jet printhead connected to a tank containing an ink of a slow rearrangement type, said ink comprising water, a humectant, a soluble dye and a non-ionic surfactant comprising an ethoxylated alcohol or an ethoxy-propoxylated alcohol.
31. The thermal ink jet printhead of claim 30, wherein said surfactant comprises a primary ethoxylated alcohol comprising an alkyl chain with 11 carbon atoms and 7 ethoxy units.
32. The thermal ink jet printhead of claim 30, wherein said surfactant comprises an ethoxy-propoxylated alcohol comprising an alkyl chain with 12 to 14 carbon atoms, 7 ethoxy units and 4.5 propoxy units.
33. The thermal ink jet printhead of claim 30, wherein said surfactant is present in said ink in an amount from 0.1% to 3% by weight.
34. A high ejection frequency thermal ink jet printing process comprising ejecting droplets of an ink having the composition of claim 1, from a printhead of a thermal ink jet printer at an ejection frequency wherein said ink has a dynamic surface tension that is maintained at least 5.5 mNm greater than the static surface tension of said ink.
35. A high ejection frequency thermal ink jet printing process comprising ejecting droplets of an ink having the composition of claim 3, from a printhead of a thermal ink jet printer at an ejection frequency wherein said ink has a dynamic surface tension that is maintained at least 5.5 mNm greater than the static surface tension of said ink.
36. A high ejection frequency thermal ink jet printing process comprising ejecting droplets of an ink from a printhead of a thermal ink jet printer at an ejection frequency wherein said ink has a dynamic surface tension that is maintained at least 5.5 mNm greater than the static surface tension of said ink.
37. The process of claim 36, wherein said ink comprises water, a humectant, a soluble dye and a non-ionic surfactant, wherein said surfactant comprises an ethoxylated alcohol or an ethoxy-propoxylated alcohol.
38. The process of claim 37, wherein said surfactant is present in said ink in an amount from 0.1% to 5% by weight.
39. The process of claim 37, wherein said surfactant comprises a primary ethoxylated alcohol comprising an alkyl chain with 11 carbon atoms and 7 ethoxy units.
40. The process to claim 37 wherein said surfactant comprises an ethoxy-propoxylated alcohol comprising an alkyl chain with 12 to 14 carbon atoms, 7 ethoxy units and 4.5 propoxy units.