110 results about "Chalk line" patented technology

A tape measure that incorporates a marking device for allowing an individual to measure and mark a wide variety of materials in a more efficient and economical manner, and for measuring and marking the beginning point of reference and the measured position point simultaneously. The tape measure has a housing, a coiled measuring tape, a tape tip, a chalk line, a chalk receptacle, a chalk line recharger, an activator, and an advancer. The chalk line is easily advanced and retracted for making marks at varying distances. The chalk is stored in a chalk storage receptacle that allows the chalk line to be re-chalked and is refillable for multiple uses. The activator allows the retractable chalk line to transfer a chalk substance from the chalk line to the surface to be measured and marked.

A line-marking device (100) includes a chalk line (200) that is held in an elongated frame (170). A worker can position and align the device, then snap the line (200) using a manually operated trigger (650) to leave a mark on a surface (530), such as a wall or floor. An adjustable level device (115) on the frame (170) can be rotated to dial a desired angle for the line. The adjustable level device (115) may be provided in an angle setting device independently of the line-marking device. A laser device (125) may be carried at the tip (120) of (or elsewhere on) the frame (170) to allow the chalk line to be aligned with a reference mark (145). Respective markings (176, 177) on edge regions of rails (171, 174) of the frame (170) may indicate an angular setting of a guide bar (500), or, a protractor (810, 810a) may indicate the angular setting. The guide bar (500) may be relocated facing away from the filament (200) and used as an angle finding device. A retractable tape measure (1500) carried by the device enables a worker to measure distances from the chalk line.

The present invention is moisture resistant chalk line composition comprising an effective amount of calcium carbonate, an effective amount of one or more dyes, and an effective amount of one or more hydrophobes, said effective amount of calcium carbonate comprises at least about 50% by weight of the composition, said effective amount of one or more dyes is selected from a range of about 0% to about 49% by weight of the composition, and said effective amount of one or more hydrophobes does not exceed about 30% by weight of the composition. The chalk line composition is useful for repeatedly marking guide lines with the same chalk line device on wet surfaces or moist environments. Also claimed is a method for repeatedly forming guide lines on surfaces utilizing a moisture resistant chalk line composition with a snap line from a chalk line device.

An improved chalk line tip for a chalk-line. The tip having a string attachment portion, having a first end configured to receive a pivot pin therein and extending in a generally arcuately shaped configuration toward a second end, which is also configured to receive a pivot pin therein. The string connection body defining an aperture dimensioned to allow passage of a portion of the attachment portion therethrough. A surface attachment portion having various devices for attaching the surface attachment portion to a surface to be marked. The tip is configured to allow various configurations of the attachment device to be presented and attached to a surface to be marked thus allowing for increased applicability and utility upon a variety of surfaces.

A chalk line tool is provided having a tear-drop shaped body which houses a chalk line spool and chalk for coating the chalk line and a handle connected to the body and acting as a reservoir for additional chalk. The reservoir feeds the cavity in the body. The flow of chalk is controlled between the reservoir and the cavity. The handle advantageously acts to maintain the operator's hands away from the hand crank used to retract the chalk line and provides an extended reach with the tool for improved ergonomics when using the tool. The chalk line tool can be manufactured with the handle or can be retrofit with parts which are supplied as a kit.

A waterproof chalk composition including silicone oil, powdered chalk, and optional colorants, suitable for applying to a chalk line of a chalk line device, is provided. Methods of making and using the waterproof chalk composition using silicone oil, powdered chalk, and colorants, are provided. The waterproof chalk composition provided herein can be used or packaged immediately after preparation, and does not require a drying step to evaporate solvents. The waterproof chalk composition provided herein does not contain environmentally unfriendly components such as solvents.

The invention discloses a method for calibrating a concrete prefabricated wallboard installation construction datum. The method includes the following steps that (1), a construction datum calibrating device is manufactured and comprises a supporting assembly, a ruler rod and a connecting and locking assembly; (2), chalk lines are marked at the corresponding positions where concrete prefabricated wallboards are to be installed; (3), the supporting assembly is propped; (4), a laser paying-off instrument is placed above the chalk line portion and emits rays; (5), the ruler rod is connected, the side surface of the ruler rod faces toward the direction in which the wallboards are to be installed, the side surface of the ruler rod coincides with the rays, and then the side surface of the ruler rod forms the construction datum for installing the concrete prefabricated wallboards. The invention further discloses the construction datum calibrating suite device. The concrete prefabricated wallboard installation construction datum not only improves the working efficiency of installing the concrete prefabricated wallboards, but also is beneficial to ensuring the flatness of a siding wall under construction, and is more beneficial to ensuring bond quality between the wallboards or between the wallboards and corresponding vertical faces under construction.

A chalk line apparatus for marking regularly spaced locations. The apparatus comprises a casing for powdered chalk containing a rotatable reel, line wound on said reel, and an exit opening for the line at one end of the holder. The line has evenly spaced short segments disposed thereon so that when the line is tensioned to a predetermined level of about 10-15 lbs, the segments reside at precisely placed predetermined intervals. When the line is snapped, chalk marks are placed on the wall surface in a pattern that identifies the appropriate locations of underlying wall studs.

A chalk line marking device includes a chalk line that is held in a storing, dispensing and retracting device. The device comprises a housing and an element for gripping the chalk line when it is extended from the dispensing device and lifting it from the workpiece surface at a point remote from the device. A spring mechanism causes the gripping element to suddenly snap back to its original position, when released, thereby causing the chalk line to leave a linear chalk mark on the workpiece surface. The device may also comprise a gripping element arranged within the housing that includes a plunger responsive to movement of the housing, for lifting and suddenly releasing the gripping element. A worker can extend the chalk line with one hand while holding the dispensing device in the other hand. The hand holding the dispensing device can actuate the gripping element with the thumb, for example, of that same hand while the other hand holds the extended end of the chalk line in position, thereby not requiring a third hand to snap the chalk line.

A chalk line device includes a housing and a chalk line stored in the housing. The chalk line terminates in a hook at one end and the hook is disposed outside of the housing. The housing may include a side wall with a depression formed therein that is shaped to receive the hook for storage. The depression has an edge that allows the hook to securely engage. The housing may also include a translucent window for allowing the user to check the level of chalk in the chalk line device. The translucent window forms at least a portion of a wall of the housing. The translucent window can be made, for example, of a plastic and can be integrally formed with the housing.

The invention discloses a wall hole opening construction method adopting an encased angle iron method. The wall hole opening construction method includes the steps of firstly, designing angle iron; secondly, determining the size and the position of a hole by flicking a chalk line on a wall where the hole is to be opened; thirdly, scraping away a mortar painting layer at the position, nearby the position of the chalk line, of the top of the hole, and selecting a mortar joint closest to the chalk line as a horizontal mortar joint embedded in the angle iron, wherein the depth of the horizontal mortar joint is 80 mm, the length of the horizontal mortar joint is equal to the width of the hole after the hole extends leftwards by 500 mm and extends rightwards by 500 mm, the hole extends leftwards by 500 mm and extends rightwards by 500 mm to serve as supporting points of the angle iron, and a 160 mm mortar joint is formed in the other side of the wall if the wall thickness is 240 mm; fourthly, after the mortar joins are cleaned, structural cement gum is smeared into the mortar joints, horizontal limbs of the angle iron are inserted into the horizontal mortar joint to enter the wall till perpendicular limbs of the angle iron are flush with the wall; fifthly, filling supporting positions of the angle iron through a thin steel plate; sixthly, conducting construction in the same way on the other side of the wall according to the first step to the fifth step; seventhly, scraping away mortar face layers on the two sides of the portion, inside the chalk line, of the inner wall face, detaching bricks to open the hole from top to bottom till reaching a floor; eighthly, adding batten plates or lacing and batten elements to the manufacture angle iron.

A chalk line apparatus for marking regularly spaced locations. The apparatus comprises a casing for powdered chalk containing a rotatable reel, a wire rope wound on said reel, and an exit opening for the wire rope at one end of the holder. The wire rope is coated with a material that resists retention of chalk, and has evenly spaced short chalk-retaining segments disposed thereon so that when the wire rope is tensioned to about 10 lbs, the segments reside at precisely placed predetermined intervals. When the line is snapped, the chalk-covered short segments leave evenly spaced chalk marks that correspond to the locations of underlying wall studs.