Method for production of sheets made from binder, production line for said sheets and device for generation of an impression

• US 20050139052A1
• Filed: 02/25/2003
• Published: 06/30/2005
• Est. Priority Date: 02/26/2002
• Status: Active Grant

• Current Assignee: Continental Building Products Operating Company, Llc (Compagnie de Saint-Gobain SA)
• Original Assignee: Lafarge Platres (Holcim Limited)
• Inventors: Rigaudon, Michel, Jallon, Paul, Laurent, Jean Louis, Solomut, Jean Paul
• Granted Patent: US 7,790,090 B2
• Time in Patent Office: Days
• US Class Current: 83/76.100
• CPC Class Codes: B28B 11/08 for reshaping the surface, e.g. smoothing, roughening, corrugating, making screw-threads
• CPC Class Codes: B28B 11/0863 for profiling, e.g. making grooves
• CPC Class Codes: B28B 11/166 with devices for determining the correct cutting moment, e.g. measuring rollers or the like
• CPC Class Codes: B28B 19/0092 to webs, sheets or the like, e.g. of paper, cardboard
• CPC Class Codes: Y10T 83/162 With control means responsive to replaceable or selectable information program

Abstract

The invention relates to a method of manufacturing sheets based on hydraulic binder, particularly sheets of plasterboard with feathered edges. This method comprises the steps of:

• • 1) making a mark (301) on a facing (2 or 3) of the preform (5);
  • 2) detecting the mark (301); and
  • 3) sending an actuating signal to a device (9) for cutting the preform (5).

The invention also relate to a production line for producing such sheets, and to an apparatus, particularly for making an impression (12, 12bis) in a preform (5). This apparatus comprises:

• • a frame (101);
  • first (102, 103) and second (105, 106) pulleys;
  • two belts (108, 109) wrapped around the pulleys (102, 103, 105, 106);
  • at least one wire (111) extending between these belts (108, 109) so that its axis is parallel to the axis of the pulleys (102, 103, 105, 106).

Claims

1-36. -36. (canceled)

37. An apparatus for making an impression in a preform based on hydraulic binder, this apparatus comprising at least:

a frame;

two first pulleys supported at a first end of the frame and two second pulleys at a second end of the frame;

the first pulleys and second pulleys being in parallel planes;

the pulleys of the first pulleys and second pulleys facing each other being identical;

two transmission belts wrapped respectively around the first pulleys and the second pulleys; and

at least one wire fixed removably to the belts and extending between these belts so that its longitudinal axis is parallel to the axis of rotation of the pulleys.

38. The apparatus according to claim 37, wherein it comprises a plurality of wires arranged parallel to each other, along the transmission belts and fixed removably.

39. The apparatus according to claim 37, wherein the pulleys are sprockets and the transmission belts are chains.

40. The apparatus according to claim 37, wherein the wires are held on the chains by means of support pieces and wire gripper pins.

41. The apparatus according to claim 37, further comprising means for driving the rotation of at least one of the pulleys.

42. The apparatus according to claim 37, further comprising an upper forming plate and a lower forming plate between which plates the wire(s) can pass.

43. A production line for producing sheets based on hydraulic binder from a preform comprising a facing material covered with a hydraulic binder composition and supported by a conveyor belt, comprising an apparatus for making an impression in a preform based on hydraulic binder, this apparatus comprising at least:

a frame;

two first pulleys supported at a first end of the frame and two second pulleys at a second end of the frame;

the first pulleys and second pulleys being in parallel planes;

the pulleys of the first pulleys and second pulleys facing each other being identical;

two transmission belts wrapped respectively around the first pulleys and the second pulleys; and

at least one wire fixed removably to the belts and extending between these belts so that its longitudinal axis is parallel to the axis of rotation of the pulleys;

the distance between the transmission belts of the apparatus being at least equal to the width of the preform and the apparatus being arranged in an appropriate way so that when its transmission belts are turning, the wire creates an impression in the preform.

44. The production line according to claim 43, further comprising, near the conveyor belt, means for introducing a lath the length of which is at least approximately equal to the width of the preform between the preform and the conveyor belt at the impression or opposite the place on the preform where the impression has been made.

45. The production line according to claim 43, wherein its transmission belts each comprise a pushing finger and pushers resting on a plate are provided, these pushers being able to be pushed by the pushing fingers toward the preform and in their movement to drive a lath, so that the latter is introduced under the preform, and means for returning the pusher to its initial position.

46. The production line according to claim 43, further comprising a device for covering the hydraulic binder composition with a second facing material.

47. The production line according to claim 43, wherein the apparatus for making an impression comprises a plurality of wires arranged parallel to each other, along the transmission belts and fixed removably.

48. The production line according to claim 43, wherein in the apparatus for making an impression, the pulleys are sprockets and the transmission belts are chains.

49. The production line according to claim 43, wherein in the apparatus for making an impression, the wires are held on the chains by means of support pieces and wire gripper pins.

50. The production line according to claim 43, wherein the apparatus for making an impression further comprises means for driving the rotation of at least one of the pulleys.

51. The production line according to claim 43, wherein the apparatus for making an impression further comprises an upper forming plate and a lower forming plate between which plates the wire can pass.

52. The production line according to claim 51, wherein the apparatus for making an impression is situated above the preform and replaces a forming plate or a forming roller, the wires then passing between said upper plate and lower plate.

53. The production line according to claim 43, wherein the hydraulic binder contains plaster.

54. A method of manufacturing a sheet based on hydraulic binder from a preform intended to be cut, this method comprising the step of providing an apparatus for making an impression in a preform based on hydraulic binder, this apparatus comprising at least:

a frame;

two first pulleys supported at a first end of the frame and two second pulleys at a second end of the frame;

the first pulleys and second pulleys being in parallel planes;

the pulleys of the first pulleys and second pulleys facing each other being identical;

two transmission belts wrapped respectively around the first pulleys and the second pulleys; and

at least one wire fixed removably to the belts and extending between these belts so that its longitudinal axis is parallel to the axis of rotation of the pulleys,

actuating said apparatus on a preform so that the at least one wire makes an impression on the preform.

55. The method according to claim 54, further comprising the step of cutting the preform at the impression or opposite the place where the impression has been made.

56. The method according to claim 54, wherein the hydraulic binder contains plaster.