什么是裹背(bei)條(tiao)，裹背(bei)條(tiao)是通過皮殼(ke)機等(deng)機械用于精裝(zhuang)書(shu)(shu)本的(de)(de)書(shu)(shu)脊(ji)部分(fen)，使(shi)書(shu)(shu)貼(tie)連接得(de)更加牢固。書(shu)(shu)脊(ji)制(zhi)作弧長的(de)(de)計算，本器規格依(yi)書(shu)(shu)芯幅面大小進行調定，以能將(jiang)書(shu)(shu)芯平穩(wen)地(di)送(song)進夾(jia)書(shu)(shu)裝(zhuang)置內為標準。入本后的(de)(de)書(shu)(shu)冊不斜歪，四角垂直地(di)頂(ding)齊在(zai)夾(jia)書(shu)(shu)裝(zhuang)置的(de)(de)靠板(ban)、側規內。裁切尺寸(cun)正確一(yi)致，其質量要求與(yu)規格誤差與(yu)一(yi)般(ban)切書(shu)(shu)相同。

夾書(shu)(shu)簽絲帶(dai)裝置安放(fang)在(zai)切書(shu)(shu)機與扒圓(yuan)起(qi)脊機之間(jian)。即(ji)將切完(wan)的(de)書(shu)(shu)芯(xin)(xin)，用分(fen)本(ben)器從中(zhong)(zhong)間(jian)分(fen)開，再由(you)輸放(fang)絲帶(dai)器將絲帶(dai)夾入中(zhong)(zhong)心(xin)紙書(shu)(shu)芯(xin)(xin)的(de)中(zhong)(zhong)間(jian)靠訂縫(feng)一邊。絲帶(dai)夾在(zai)書(shu)(shu)芯(xin)(xin)內兩端(duan)各留(liu)出粘邊和使(shi)用的(de)余(yu)地，再經切刀(dao)(dao)（剪刀(dao)(dao)式）將其剪斷(duan)。

剪斷后(hou)的絲(si)(si)帶，裹背(bei)(bei)條芯(xin)部分被(bei)下(xia)面(mian)膠(jiao)輥著膠(jiao)、壓(ya)實完成夾書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)簽絲(si)(si)帶過程。書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)簽絲(si)(si)帶的長度(du)(du)與一(yi)般(ban)手工加(jia)(jia)工長度(du)(du)基本(ben)相同(tong)，可依書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)冊幅面(mian)長度(du)(du)調定(ding)。扒(ba)圓(yuan)(yuan)(yuan)起(qi)脊(ji)(ji)操作(zuo)及要求。書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)芯(xin)經(jing)裁切、夾粘(zhan)絲(si)(si)帶（或(huo)(huo)不(bu)夾粘(zhan)絲(si)(si)帶）后(hou)，繼(ji)續傳送（或(huo)(huo)翻(fan)轉變位）并(bing)做90°翻(fan)轉，使平(ping)放書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)芯(xin)變為(wei)后(hou)背(bei)(bei)朝上（或(huo)(huo)朝下(xia)）而(er)進入(ru)扒(ba)圓(yuan)(yuan)(yuan)起(qi)脊(ji)(ji)機。扒(ba)圓(yuan)(yuan)(yuan)起(qi)脊(ji)(ji)機的加(jia)(jia)工，其操作(zuo)分為(wei)兩步，但(dan)機器的結構(gou)是連在(zai)一(yi)起(qi)的，均是先(xian)扒(ba)圓(yuan)(yuan)(yuan)后(hou)起(qi)脊(ji)(ji)。扒(ba)圓(yuan)(yuan)(yuan)。扒(ba)圓(yuan)(yuan)(yuan)起(qi)脊(ji)(ji)機在(zai)扒(ba)圓(yuan)(yuan)(yuan)時，由一(yi)組（或(huo)(huo)一(yi)對）圓(yuan)(yuan)(yuan)輥，將書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)芯(xin)壓(ya)緊后(hou)作(zuo)相對旋轉動作(zuo)），使書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)背(bei)(bei)扒(ba)成適當(dang)規格圓(yuan)(yuan)(yuan)勢，加(jia)(jia)工成圓(yuan)(yuan)(yuan)背(bei)(bei)書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)芯(xin)。書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)芯(xin)書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)背(bei)(bei)的形狀分為(wei)圓(yuan)(yuan)(yuan)背(bei)(bei)有脊(ji)(ji)、圓(yuan)(yuan)(yuan)背(bei)(bei)無脊(ji)(ji)和方背(bei)(bei)（或(huo)(huo)稱平(ping)背(bei)(bei)）三種。平(ping)裝裹背(bei)(bei)條書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)刊(kan)的書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)脊(ji)(ji)不(bu)高出(chu)書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)芯(xin)平(ping)面(mian)，而(er)精裝書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)刊(kan)的書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)脊(ji)(ji)一(yi)般(ban)要高出(chu)書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)芯(xin)的平(ping)面(mian)。書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)脊(ji)(ji)分為(wei)真脊(ji)(ji)和假脊(ji)(ji)。

真(zhen)脊是利(li)用書(shu)背(bei)上下兩邊(bian)變形的(de)弧度高出(chu)書(shu)芯平面；假脊則是利(li)用紙(zhi)板(ban)鑲在書(shu)背(bei)后形成的(de)書(shu)脊，書(shu)脊的(de)脊高等于封面紙(zhi)板(ban)的(de)厚度。方背(bei)書(shu)芯。是指書(shu)芯的(de)書(shu)背(bei)平直方正。書(shu)背(bei)不突出(chu)，與平裝書(shu)刊的(de)書(shu)背(bei)基本(ben)相似。

背(bei)(bei)(bei)(bei)與書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)芯(xin)(xin)(xin)(xin)(xin)上(shang)下環襯互成直角，由(you)于精(jing)裝(zhuang)(zhuang)(zhuang)書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)芯(xin)(xin)(xin)(xin)(xin)是用(yong)鎖線訂(ding)訂(ding)連，每一(yi)個(ge)書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)帖(tie)(tie)的(de)(de)(de)訂(ding)口折縫里面(mian)都用(yong)線串過，因此，書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)芯(xin)(xin)(xin)(xin)(xin)背(bei)(bei)(bei)(bei)脊比書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)帖(tie)(tie)其它部分要厚(hou)一(yi)些，書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)籍的(de)(de)(de)帖(tie)(tie)數越多，書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)脊背(bei)(bei)(bei)(bei)與書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)芯(xin)(xin)(xin)(xin)(xin)其它部分厚(hou)度的(de)(de)(de)差別(bie)也越大。所以方(fang)背(bei)(bei)(bei)(bei)書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)芯(xin)(xin)(xin)(xin)(xin)的(de)(de)(de)形(xing)(xing)(xing)式一(yi)般只用(yong)于厚(hou)度約(yue)為20mm的(de)(de)(de)精(jing)裝(zhuang)(zhuang)(zhuang)書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)籍。圓(yuan)(yuan)(yuan)(yuan)背(bei)(bei)(bei)(bei)有(you)脊書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)芯(xin)(xin)(xin)(xin)(xin)。圓(yuan)(yuan)(yuan)(yuan)背(bei)(bei)(bei)(bei)有(you)脊又稱(cheng)圓(yuan)(yuan)(yuan)(yuan)背(bei)(bei)(bei)(bei)真脊書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)芯(xin)(xin)(xin)(xin)(xin)。書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)芯(xin)(xin)(xin)(xin)(xin)背(bei)(bei)(bei)(bei)部呈圓(yuan)(yuan)(yuan)(yuan)弧(hu)形(xing)(xing)(xing)，書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)脊高(gao)起有(you)脊壟(long)，堅硬挺實，這種書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)背(bei)(bei)(bei)(bei)的(de)(de)(de)形(xing)(xing)(xing)式適合于裝(zhuang)(zhuang)(zhuang)訂(ding)較厚(hou)的(de)(de)(de)書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)籍，裝(zhuang)(zhuang)(zhuang)上(shang)書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)殼(ke)后有(you)明顯(xian)的(de)(de)(de)書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)槽，翻(fan)閱方(fang)便。目前我(wo)國的(de)(de)(de)精(jing)裝(zhuang)(zhuang)(zhuang)書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)籍多采(cai)用(yong)這種圓(yuan)(yuan)(yuan)(yuan)背(bei)(bei)(bei)(bei)有(you)脊的(de)(de)(de)加工形(xing)(xing)(xing)式。圓(yuan)(yuan)(yuan)(yuan)背(bei)(bei)(bei)(bei)無脊書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)芯(xin)(xin)(xin)(xin)(xin)。圓(yuan)(yuan)(yuan)(yuan)背(bei)(bei)(bei)(bei)無脊書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)芯(xin)(xin)(xin)(xin)(xin)又稱(cheng)圓(yuan)(yuan)(yuan)(yuan)背(bei)(bei)(bei)(bei)假脊，書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)芯(xin)(xin)(xin)(xin)(xin)背(bei)(bei)(bei)(bei)部呈圓(yuan)(yuan)(yuan)(yuan)弧(hu)形(xing)(xing)(xing)，書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)背(bei)(bei)(bei)(bei)與書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)芯(xin)(xin)(xin)(xin)(xin)的(de)(de)(de)厚(hou)度相(xiang)同，堅實挺括(kuo)，但沒有(you)書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)裹背(bei)(bei)(bei)(bei)條脊。這種形(xing)(xing)(xing)式的(de)(de)(de)書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)芯(xin)(xin)(xin)(xin)(xin)，一(yi)般常與軟質書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)殼(ke)或塑(su)料壓制(zhi)而成的(de)(de)(de)書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)殼(ke)相(xiang)配套。中心紙有(you)些機器還沒有(you)沖(chong)(chong)圓(yuan)(yuan)(yuan)(yuan)裝(zhuang)(zhuang)(zhuang)置，即將(jiang)方(fang)背(bei)(bei)(bei)(bei)書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)先進行(xing)沖(chong)(chong)圓(yuan)(yuan)(yuan)(yuan)加工，作(zuo)初步定型。先根據書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)芯(xin)(xin)(xin)(xin)(xin)厚(hou)度和(he)中心紙幅面(mian)大小調定好(hao)夾(jia)書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)器及扒(ba)圓(yuan)(yuan)(yuan)(yuan)輥（或沖(chong)(chong)圓(yuan)(yuan)(yuan)(yuan)裝(zhuang)(zhuang)(zhuang)置）的(de)(de)(de)規矩(ju)，再使書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)芯(xin)(xin)(xin)(xin)(xin)進入(ru)夾(jia)書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)器內并送到扒(ba)圓(yuan)(yuan)(yuan)(yuan)輥之間(jian)，將(jiang)書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)背(bei)(bei)(bei)(bei)扒(ba)擠(ji)成一(yi)定圓(yuan)(yuan)(yuan)(yuan)勢。