摘要:
An electrophotographic photosensitive member is characterized by having a photosensitive layer containing at least one disazo pigment represented by the formula ##STR1## wherein Cp represents a coupler residue; B.sub.1, B.sub.2, B.sub.1 ', and B.sub.2 ' independently of one another represent atoms or groups selected from the group consisting of hydrogen, halogen, lower alkyl, lower alkoxy, acylamino, and hydroxyl; and A represents ##STR2## (D.sub.1 and D.sub.2 represent single bond between two ##STR3## or between two ##STR4##
摘要:
An improved method and apparatus for winding a yarn on a package are disclosed. The apparatus comprises the package supported on a pair of cradle arms and driven by a friction roller, with a traverse guide disposed between a traverse drum and a cam plate so as to reciprocatingly traverse the yarn from one end of the package to the other. The traverse cam plate is positionally controlled to vary the width of the traverse by an arcuate cam, affixed to the cradle arm, acting on a first pivoting lever connected by a rod to the cam plate such that the width of the traverse is decreased as the package size grows. A second cam, affixed to the cradle arm acts on a second lever during an initial winding period to maintain a pivot axis of the first lever in a fixed position. After disengagement of the second lever from the second cam, the second lever is engaged by a programmably driven third cam to vary the position of the pivot axis of the first lever such that the traverse width may be controllably varied, in addition to the decrease caused by the arcuate cam acting on the first lever, to stagger yarn rises at the edges of the package. The invention further includes the method of using the apparatus.
摘要:
An electrophotographic photosensitive member have a photosensitive layer, said photosensitive layer comprising at least one dis-azo pigment of Formula (I) or Formula (II) shown below: ##STR1## wherein Z represents an oxygen atom, a sulfur atom or >N--A.sub.2, wherein A.sub.2 is a hydrogen atom or a lower alkyl, A.sub.1 a hydrogen atom, a lower alkyl or a halogen atom; Ph.sub.1 an unsubstituted or substituted phenylene group, n an integer of 0 or 1, and B.sub.1 a coupler residue; with proviso that when n is 0, Z is an oxygen atom and A.sub.1 is a hydrogen atom, the case where Ph.sub.1 represents substituted phenyl radicals except for unsubstituted or mono-substituted phenyl radicals with a halogen atom, a lower alkyl or an alkoxy group;and ##STR2## wherein Ph.sub.2 represents an unsubstituted or substituted phenylene group and B.sub.2 a coupler residue.
摘要:
An electrophotographic photosensitive member is characterized by comprising a charge generation layer containing at least one disazo pigment represented by the following formula [I] and a charge transport layer containing at least one hydrazone compound represented by the following formula [II]: ##STR1## wherein A is a coupler residue, B represents hydrogen, halogen, alkyl, or alkoxy, and n is an integer of 1 to 4; ##STR2## wherein R.sub.1 represents N,N-dialkyl amino, or N,N-diarylamino, or N-alkyl-N-arylamino, or alkoxy or aryloxy, each being substituted or unsubstituted; R.sub.2 and R.sub.3 each represent alkyl, aralkyl, or aryl, each being substituted or unsubstituted, or R.sub.2 and R.sub.3, together with the nitrogen atom which links them, represent nitrogen-containing heterocyclic ring; R.sub.4 represents hydrogen, or alkyl, aralkyl, or aryl, each being substituted or unsubstituted; R.sub.5 represents hydrogen, alkyl, or alkoxy; and l is 0 or 1.
摘要:
An electrophotographic light-sensitive medium comprising a light-sensitive layer containing a dis-azo compound represented by Formula (1) ##STR1## wherein A represents a single chemical bond, a divalent hydrocarbon group containing a conjugated double bond, a divalent hydrocarbon group containing a nitrogen atom in a conjugated double bond, or a divalent heterocyclic group which may be condensed with a benzene ring or substituted and forms a conjugated double bond system in combination with the adjacent azomethine groups, and B and B', which may be the same or different, each represents a coupler having aromatic properties.
摘要:
An electrophotographic light-sensitive medium is described comprising a light-sensitive layer containing a dis-azo compound represented by Formula (1) ##STR1## wherein A represents a coupler having aromatic properties.
摘要:
A method and apparatus for producing a molded polyurethane foam without using low-boiling solvents such as Freon and methylene chloride which present problems when used as a blowing agent. The polyurethane foam has the same good appearance and soft feeling as that produced with low-boiling solvents. A polyurethane foam is produced by injecting a polyurethane material into an evacuated cavity and permitting it to expand so that it flows and fills the cavity, said polyurethane material being composed of 100 parts by weight of polyol component and 0.1-0.6 part by weight of water as a blowing agent. The cavity pressure may be maintained high spontaneously or low while the polyurethane material is flowing in the cavity. When the polyurethane material has reached the final fill position in the cavity, the fore-end of the polyurethane material is discharged from the cavity.
摘要:
An electrophotographic light-sensitive medium is described comprising at least an electrically conductive layer, a charge generation layer and a charge transport layer, the charge generation layer containing a dis-azo compound represented by Formula (1) wherein A represents a single bond, ##STR1## B represents a coupler having aromatic properties; and R represents a group selected from hydrogen, a halogen and a lower alkyl having 1 to 4 carbon atoms.