A marking comprises a layer, preferably of film-forming material, which contains a photochromic compound. The photochromic compound is capable of changing color when exposed to uv light, but can be converted to a permanently non-photochromic compound, preferably by overexposure to uv light. An image is formed in the layer by converting the photochromic compound to a permanently non-photochromic compound in one or more selected areas. When the layer is subsequently viewed under uv light a colorle...

A method of marking materials, wherein the surface of a marking material and the surface of a material to be marked are matched, a laser beam is applied to the marking material while scanning the beam to form a mark, the material to be marked consisting a transparent body on which a pattern of a character or the like is formed. The method for marking comprises a first step of applying the laser beam to the marking material with the first laser power to evaporate the marking material and make the...

Marking tapes for marking articles is described. The marking tape consists of a tubular hose or cover of a soft and transparent material. The cross section of the hose or cover may be of circle or of rectangular form and have a diameter length being somewhat less than the width of marking plates to be inserted in the hose or cover. The hose or cover will be provided with spaced holes and/or lugs for fastening of the hose or cover onto articles. The ends of a single hose or cover may be furnished...

A marking device includes a marking mechanism, a marking portion moving mechanism, and a pressure adjusting circuit. The marking mechanism marks a surface to be processed, of an object to be marked, by reciprocating a marking portion. The marking portion moving mechanism moves the marking portion in two-dimensional directions along the surface to be processed. The pressure adjusting circuit keeps a constant pressure which the marking portion applies to the surface to be processed. The marking me...

A marking liquid which contains a polymer dispersion with particles which are colored with marking agent, optionally further dyes and marking agents, one or more salts of a polyvalent, in particular bi- or trivalent cation, water and optionally moisture retaining agents and further usual additives, wherein the polymer forming the polymer particles is selected from the group of polyesters, polyester amides, polymers and copolymers based on acrylate or methacrylate with a proportion of free carbox...

A marking apparatus that is useful for marking a line upon a ridge protruding from a surface of a continuously passing elongated article is disclosed. A stylus member of the marking apparatus has a notch in its foot, through which the ridge on the article passes. A tracking arm member is pivotally attached to a bar member, and supports the stylus member, so that the stylus member can follow the track of the ridge even if the article wanders from side to side as it passes the marking apparatus. M...

A marking apparatus for providing individual marker sleeves for cables is arranged to receive tubing and transport it lengthwise of itself past a marking head of the apparatus, the marking head being responsive to command signals supplied to it from a character generation unit to mark the tubing with required indicia or characters. Downstream of the marking head, a cutting mechanism is provided for severing or semi-severing the tubing according to the required individual marker sleeves.

A marking device is configured to retain a preprinted card normally printed with inventory or reminder list items. The body of the device has a support and a face piece with correspondingly mating embossing elements for so marking the related item on the list. The embossing elements are a number of manually movable keys that leave an impression on the card when depressed into engagement with the protrusions aligned with the support piece below. The body may be made of plastic with the face piece...

There is provided a marking apparatus, a marking method, and a marking system that enable the position of a marking target to be accurately shown, and that reliably enable only that portion containing the marking target to be removed. The marking system has a detector that detects a marking target on a subject material and acquires the position thereof, a marking apparatus having heads capable of marking an optional position in the transverse direction of the subject material, and a control appa...

Herein are disclosed marking plates in which opposed edges of a plate are bent toward one another to define channels opening upon a mid-part of the plate. A row of strip-parts of uniform width, each bearing a symbol, are held to the plate by having marginal edge portions slideably held in the channels. The mid-part of the plate defines a row of mounting holes parallel to the channels such that each hole has a length, and the holes are separated by this length, equal to the width of the strip-par...