An electrostatic latent image is formed on a photoconductive or dielectric image carrier by a technique in which the image carrier is charged and exposed utilizing the photoconductivity, or by a technique in which the surface of the image carrier is directly and selectively charged with a stylus or a pin tube. The latent image is either directly developed or subjected to reversal development to form a positive or a negative visual image on the carrier. The direct development or reversal developm...

A recording system with a chart recorder having a movable pen arranged for providing a record on a moving chart of the varying value of a variable has the feature that means are arranged for causing the pen repetitively, at intervals or at selected moments or occasions to execute a traverse on the chart and in so doing to record the current value of a second variable on the chart in binary representation by marking or not marking chart zones crossed in the traverse and allotted to respective inf...

A method of directly forming a light scattering image, wherein a recording layer is information-wise exposed in the visible light spectral region to a light energy dose of at least 10.sup.-1 Ws cm.sup.-2 with a focussed laser-beam having a beam intensity of at least 10.sup.4 W cm.sup.-2. The recording layer is a thermoplastic polymer layer having dissolved therein at least one substance absorbing visible light, which substance imparts a specular density to the recording layer of at least 0.1 wit...

A recording sheet comprising a support having thereon a layer of a color developer capable of forming a developed color image in the presence of a color former, wherein the color developer layer contains (1) a dimer of a compound of the formula (I): ##STR1## wherein R.sub.1, R.sub.2 and R.sub.3, which may be the same or different, each represents a hydrogen atom, an alkyl group, an aryl group or an aralkyl group, and n is an integer of 1 to 4, as a color developer, and (2) an oil adsorptive inor...

A recording apparatus includes a modular cutter assembly. The cutter assembly includes a rotary cutter blade which is spring biased into uniform engagement with a fixed complementary blade. An actuating lever for the cutter blade also includes the additional feature of serving as a guide platen between the cutter and the subsequent drive means for a record member. Further as the actuating lever is operated to actuate the cutter blade, a soft loop is formed in the record member to accommodate the...

There has been provided, in accordance with the present invention, a recording system for light sensitive recording medium in which a latent image is developed by heating the photographic emulsion by means of a current passing through a conductive coating on the back of the record member. The record member is exposed to a light pattern to impose a latent image over a predetermined sheet length of recording medium. The recording medium is driven past the exposure station by a driving roller, a ro...

A recording element comprising a support and microcapsules provided thereon, which microcapsules contain a specific color-former and, as a solvent therefor, a triarylmethane type hydrocarbon compound.

A recording device for recording electrical signals on a moving strip or ribbon-shaped recording medium characterized by the device having a housing, which supports a drive means for rotating a feed roller, a writing needle and means for actuating the writing needle, and a carriage which is received in the housing and supports a supply of the recording medium, and at least one pressure roller. The carriage has a preformed part adjacent to the writing edge which conforms to the desired path for t...

A magnetic tape recording and reproducing apparatus has a head assembly comprising a plurality of transducing heads, and guide means arranged so that the heads are spaced apart by a distance which is great enough so that only one head is affected by a blemish or dust speck on the tape but yet gives an ability to follow tracks on the tape which are closely packed. The guide means and the heads are disposed so that when the tape is transported across the heads, the heads follow paths which are par...

A recording sheet capable of developing color when contacted with substantially colorless electron donating organic compounds functioning as a color former comprising a support having thereon a layer of a dispersion comprising (1) at least one salt of a polyvalent metal and an aromatic carboxylic acid, as a color developer, (2) at least one water-soluble polymer containing hydroxyl groups and (3) at least one of a melamine resin and a urea resin.